Complex of online and onsite lectures on materials for hydrogen generation by solar water splitting (COOL LONGBOAT) (completed)

• Kasi, Vinoth Kumar; Shmagina, Elizaveta; Bereznev, Sergei; Nordseth, Ørnulf; Mayandi, Jeyanthinath & Karazhanov, Smagul (2026). Polysilazane-Derived Layer for Enhancing Durability of Yttrium Oxyhydride Photochromic Coatings. ACS Omega. 11(6), p. 10369–10375. doi: 10.1021/acsomega.5c10912. Full text in Research Archive
• Arslan, Halil; Kuzmin, Alexei; Kasi, Vinoth Kumar; Aulika, Ilze; Moldarev, Dimitrii & Primetzhofer, Daniel [Show all 10 contributors for this article] (2025). Anion vacancy-induced photochromism and lattice relaxation in yttrium oxyhydride. Communications Materials. 6. doi: 10.1038/s43246-025-00868-2. Full text in Research Archive
• Mamedov, Damir; Karazhanov, Smagul & Alonso-Vante, N. (2024). Fermi level pinning in metal oxides: influence on photocatalysis and photoelectrochemistry. Journal of Physics: Condensed Matter. ISSN 0953-8984. 36(41). doi: 10.1088/1361-648X/ad5d3b. Full text in Research Archive
• Åsland, Anna Cecilie; Cooil, Simon Phillip; Mamedov, Damir; Røst, Håkon; Bakkelund, Johannes & Li, Z. [Show all 8 contributors for this article] (2024). Initial stages of water absorption on CeO2 surfaces at very low temperatures for understanding anti-icing coatings. Materials Research Express. 11(11). doi: 10.1088/2053-1591/ad913e. Full text in Research Archive Show summary

  Anti-icing coatings are intended to prevent ice formation on surfaces, minimising the risk of surface-related damage and also reducing ice-related hazards in society. We demonstrate the usefulness of x-ray photoelectron spectroscopy (XPS) as a tool for investigating the anti-icing properties of surfaces simultaneously with their chemical composition by looking at the initial stages of water absorption on the surface of CeO2 coatings. CeO2 coatings are robust, hydrophobic, and transmit light, thus they are suitable for a range of applications. In this work, CeO2 coatings were grown by sputter deposition and transferred to an ultra-high vacuum chamber where they were cooled to ≈ 100 K and exposed to a H2O atmosphere at 1 × 10−8 mbar. XPS measurements were performed before and after the exposure to H2O, in-situ and at cryogenic temperatures. The chemical composition of CeO2 did not change significantly during the experiment. Additionally, XPS revealed that little to no ice formed on the surface of CeO2 after the H2O exposure at ≈ 100 K. In contrast, ice was observed all over the sample holder on which the CeO2 was mounted. These findings suggest CeO2 is a promising candidate for future anti-icing coatings and that XPS is a useful technique to investigate the anti-icing properties of surfaces.

• Fernando, John Senith Ravishan; Asaithambi, Shivani S. & Chavan, Sachin Maruti (2024). Amino-Functionalizing Ce-Based MOF UiO-66 for Enhanced CO<inf>2</inf> Adsorption and Selectivity. ChemPlusChem. doi: 10.1002/cplu.202400107. Full text in Research Archive Show summary

  Metal-organic frameworks (MOF) hold great promise for CO2 adsorption due to their high surface areas, tunable pore sizes, and the ability to modify their chemical properties to enhance CO2 affinity. MOFs tagged with functional groups either at linker or metal sites have shown improved CO2 uptake capacity and selectivity. This study focuses on investigating the potential of selective CO2 adsorption using amino functionalization of linker forming Ce-UiO-66. The physicochemical properties and characteristics of MOFs to determine the degree of amino functionalization and structural stability were examined using powder X-ray diffraction (PXRD), Fourier transformer infra-red (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and N2 porosimetry and specific surface area (BET). This work unveils a novel array of results on CO2, N2 and water vapour adsorption on Ce-UiO-66-NH2. The amino-functionalized Ce-UiO-66-NH2 shows 63 % higher CO2 uptake and 84 % higher CO2/N2 selectivity at 273 K and 1 bar over Ce-UiO-66. Ce-UiO-66-NH2 also shows excellent structural stability after gas and vapour sorption making Ce-UiO-66-NH2 potential adsorbent for CO2 capture.

• Gabov, Artem; Kato, Daichi; Ubukata, Hiroki; Aso, Ryotaro; Kakudou, Naoji & Fujita, Koji [Show all 12 contributors for this article] (2024). Internal strain-driven bond manipulation and band engineering in Bi<inf>2−x</inf>Sb<inf>x</inf>YO<inf>4</inf>Cl photocatalysts with triple fluorite layers. Chemical Science. ISSN 2041-6520. 15(30), p. 11856–11864. doi: 10.1039/D4SC02092H. Full text in Research Archive
• Aravinthkumar, Kombiah; Karazhanov, Smagul & Mohan, Chinnan Raja (2024). Facile formation of STO/gC<inf>3</inf>N<inf>4</inf> hybrid composite to effectively degrade the dye and antibiotic under white light. Zeitschrift für Physikalische Chemie. ISSN 0942-9352. 238(11), p. 2033–2053. doi: 10.1515/zpch-2023-0398. Full text in Research Archive
• Mamedov, Damir; Åsland, Anna Cecilie; Cooil, Simon Phillip; Røst, Håkon; Bakkelund, Johannes & Allaniyazov, Atabek [Show all 8 contributors for this article] (2023). Enhanced hydrophobicity of CeO<inf>2</inf> thin films: Role of the morphology, adsorbed species and crystallography. Materials Today Communications. 35. doi: 10.1016/j.mtcomm.2023.106323. Full text in Research Archive Show summary

  In order to guarantee the long-term efficiency of hydrophobic materials in real-world situations, it is necessary that their surfaces are highly resistant to scratching, fouling and misting. Furthermore, for the specific applications, e.g. in photovoltaic systems, the water-repelling material must necessarily have a large bandage, such that it does not absorb light in the spectral range which is utilized by the underlying photovoltaic cell. One especially promising candidate for this and many other technologically important applications is cerium dioxide (CeO2, ceria). In the current study, we propose the production framework for the manufacturing of CeO2-based thin films with tunable wetting behavior. For obtaining the coatings with various hydrophobicity, ceria is deposited on the substrates with different roughness via reactive magnetron sputtering, with consequent treatment of the films in vapor of different hydrocarbons. By systematic study using the XRD, SEM, XPS and water contact angle (WCA) instruments, we found that surface texturization, different plains at the surface of the films as well as the adsorbed organic molecules all strongly influence on wettability of the CeO2 thin films. In addition, comparison of WCAs for ceria and silicon oxide SiOx is performed. The higher wettability for the former points out the essential role of the surface material despite presence of hydrocarbons. It is demonstrated that by purposeful controlling for all the parameters – surface texturization, the top material and its crystallography, and adsorbed organic molecules – one can reach superhydrophobic state of the surface.

• Mamedov, Damir; Karazhanov, Smagul & Alonso-Vante, N. (2023). Surface-Related Factors Affecting the Photocatalytic Process of Semiconductor Oxides: Ceria and Titania. Journal of the Electrochemical Society. ISSN 0013-4651. 170(5). doi: 10.1149/1945-7111/acd1bd. Full text in Research Archive
• Bazarbayev, Rustam; Zhou, Biao; Allaniyazov, Atabek; Zeng, Guanggen; Mamedov, Damir & Ivanitskaya, Evgenia [Show all 11 contributors for this article] (2022). Physical and chemical properties of dust in the Pre-Aral region of Uzbekistan. Environmental Science and Pollution Research. ISSN 0944-1344. 29(27), p. 40893–40902. doi: 10.1007/s11356-022-18827-6. Full text in Research Archive
• Bazarbayev, R.B.; Yakubov, K.R.; Kurbanov, D.Sh.; Allaniyazov, A.I.; Balakumar, S. & Kamalov, A.B. [Show all 11 contributors for this article] (2022). Performance of crystalline Si solar cells and module on temperature and illumination intensity. Materials Today: Proceedings. 64(5), p. 1661–1665. doi: 10.1016/j.matpr.2022.04.930. Full text in Research Archive
• Mamedov, Damir & Karazhanov, Smagul (2022). Doping-induced modulation of electronic, optical and wetting properties of CeO2. Journal of Physics and Chemistry of Solids. ISSN 0022-3697. 168. doi: 10.1016/j.jpcs.2022.110820. Full text in Research Archive
• Banu, A. Aseema; Sinthika, S.; Premkumar, S.; Vigneshwaran, J.; Karazhanov, Smagul & Jose, Sujin P. (2022). DFT study of NH3 adsorption on 2D monolayer MXenes (M2C, M = Cr, Fe) via oxygen functionalization: Suitable materials for gas sensors. FlatChem - Chemistry of Flat Materials. 31. doi: 10.1016/j.flatc.2021.100329. Full text in Research Archive
• Peter, I. John; Vijaya, S.; Anandan, S.; Karazhanov, Smagul & Nithiananthi, P. (2022). MWCNT Aided Cobalt Antimony Sulfide Electrocatalyst for Dye-Sensitized Solar Cells and Supercapacitors: Designing Integrated Photo-Powered Energy System. Journal of the Electrochemical Society. ISSN 0013-4651. 169(5). doi: 10.1149/1945-7111/ac6aef. Full text in Research Archive
• Kumaresan, Thileep Kumar; Masilamani, Shanmugharaj Andikkadu; Raman, Kalaivani; Karazhanov, Smagul & Subashchandrabose, Raghu (2021). High performance sodium-ion battery anode using biomass derived hard carbon with engineered defective sites. Electrochimica Acta. ISSN 0013-4686. 368. doi: 10.1016/j.electacta.2020.137574. Full text in Research Archive
• Gayathri, V.; Peter, I. John; Ramachandran, K.; Karazhanov, Smagul & Mohan, C. Raja (2021). Graphene Quantum Dots Embedded in NiCo2S4/MWCNT Nanocomposite as a Promising Candidate for Supercapacitors and i 3-Reduction in Dye-Sensitized Solar Cells. Energy & Fuels. ISSN 0887-0624. 35(16), p. 13360–13369. doi: 10.1021/acs.energyfuels.1c01471. Full text in Research Archive
• Devadiga, Dheeraj; Selvakumar, Muthu; Shetty, Prakasha; Santosh, Mysore Sridhar; Chandrabose, Raghu Subash & Karazhanov, Smagul (2021). Recent developments in metal‐free organic sensitizers derived from carbazole, triphenylamine, and phenothiazine for dye‐sensitized solar cells. International Journal of Energy Research. ISSN 0363-907X. 45(6), p. 6584–6643. doi: 10.1002/er.6348. Full text in Research Archive
• Strugovshchikov, Evgenii; Pishtshev, Aleksandr & Karazhanov, Smagul (2021). Orthogonal chemistry in the design of rare-earth metal oxyhydrides. Pure and Applied Chemistry. ISSN 0033-4545. 93(11), p. 1293–1299. doi: 10.1515/pac-2021-0207. Full text in Research Archive
• Strugovshchikov, Evgenii; Pishtshev, Aleksandr & Karazhanov, Smagul (2021). Theoretical Design of Effective Multilayer Optical Coatings Using Oxyhydride Thin Films. Physica status solidi (b). ISSN 0370-1972. 258(10). doi: 10.1002/pssb.202100179. Full text in Research Archive
• Banu, A. Aseema; Karazhanov, Smagul; Kumar, K. Vinoth & Jose, Sujin P. (2020). Platinum doped iron carbide for the hydrogen evolution reaction: The effects of charge transfer and magnetic moment by first-principles approach. International Journal of Hydrogen Energy. ISSN 0360-3199. 45(56), p. 31825–31840. doi: 10.1016/j.ijhydene.2020.08.163. Full text in Research Archive
• Kois, Julia; Polivtseva, Svetlana; Mamedov, Damir; Samieipour, Ali & Karazhanov, Smagul (2020). Visible light-assisted instability of kesterite Cu2ZnSnS4: What are the implications? Solar Energy Materials and Solar Cells. ISSN 0927-0248. 208. doi: 10.1016/j.solmat.2019.110384. Full text in Research Archive
• Pishtshev, Aleksandr; Strugovshchikov, Evgenii & Karazhanov, Smagul (2020). On Prediction of a Novel Chiral MaterialY2H3O(OH): A Hydroxyhydride HoldingHydridic and Protonic Hydrogens. Materials. 13(4). doi: 10.3390/ma13040994. Full text in Research Archive
• Baba, Elbruz Murat; Montero, José; Strugovshchikov, Evgenii; Zayim, Esra Özkan & Karazhanov, Smagul (2020). Light-induced breathing in photochromic yttrium oxyhydrides. PHYSICAL REVIEW MATERIALS. 4. doi: 10.1103/PhysRevMaterials.4.025201. Full text in Research Archive
• Polivtseva, Svetlana; Adegite, Joseph Olanrewaju; Kois, Julia; Mamedov, Damir; Karazhanov, Smagul & Maricheva, Jelena [Show all 7 contributors for this article] (2020). A Novel Thermochemical Metal Halide Treatment for High-Performance Sb2Se3 Photocathodes. Nanomaterials. 11(1). doi: 10.3390/nano11010052. Full text in Research Archive
• Baba, Elbruz Murat; Amenedo, José Montero; Strugovshchikov, Evgenii; Zayim, E. O. & Karazhanov, Smagul (2019). Light-induced breathing in photochromic yttrium oxy-hydrides. arXiv.org. ISSN 2331-8422. p. 1–8. doi: 10.1103/physrevmaterials.4.025201. Full text in Research Archive
• Banu, Aseema; Karazhanov, Smagul & Jose, Sujin P. (2019). Electronic structure of cobalt/iron carbide from ab-initio calculations. Materials Research Express. 6(7). doi: 10.1088/2053-1591/ab11ba. Full text in Research Archive
• Pishtshev, Aleksandr; Strugovshchikov, Evgenii & Karazhanov, Smagul (2019). Conceptual Design of Yttrium Oxyhydrides: Phase Diagram, Structure, and Properties. Crystal Growth & Design. ISSN 1528-7483. 19(5), p. 2574–2582. doi: 10.1021/acs.cgd.8b01596. Full text in Research Archive
• Vasquez, Geraldo Cristian; Maestre, David; Cremades, Ana; Ramírez-Castellanos, Julio; Magnano, Elena & Nappini, Silvia [Show all 7 contributors for this article] (2018). Understanding the effects of Cr doping in rutile TiO2 by DFT calculations and X-ray spectroscopy. Scientific Reports. 8(1). doi: 10.1038/s41598-018-26728-3. Full text in Research Archive
• Borisyuk, P.V.; Chubunova, E.V.; Lebedinskii, Yu Yu; Tkalya, E.V.; Vasilyev, O.S. & Yakovlev, V.P. [Show all 10 contributors for this article] (2018). Experimental studies of thorium ion implantation from pulse laser plasma into thin silicon oxide layers. Laser Physics Letters. ISSN 1612-2011. 15(5). doi: 10.1088/1612-202X/aaacf8. Full text in Research Archive
• Kirubakaran, D.David; Pitchaimuthu, Sudhagar; Dhas, C. Ravi; Prabhakaran, Selvaraj; Karazhanov, Smagul & Sundaram, Senthilarasu (2018). Jet-nebulizer-spray coated copper zinc tin sulphide film for low cost platinum-free electrocatalyst in solar cells. Materials Letters. ISSN 0167-577X. 220, p. 122–125. doi: 10.1016/j.matlet.2018.02.122. Full text in Research Archive
• Pishtshev, Aleksandr; Strugovshchikov, Evgenii & Karazhanov, Smagul (2018). Two Faces of Hydrogen in Yttrium Hydroxyhydride: Y2H3O(OH) – a New Inorganic Chiral System with Hydridic and Protonic Hydrogens. ChemRxiv. ISSN 2573-2293. p. 1–38. doi: 10.26434/chemrxiv.6301571.v1. Full text in Research Archive
• Ullah, Habib; Tahir, Asif A; Bibi, Salma; Mallick, Tapas K. & Karazhanov, Smagul (2018). Electronic properties of β-TaON and its surfaces for solar water splitting. Applied Catalysis B: Environmental. ISSN 0926-3373. 229, p. 24–31. doi: 10.1016/j.apcatb.2018.02.001. Full text in Research Archive
• Karazhanov, Smagul; Pishtshev, Aleksandr & Klopov, M (2015). Electronic and optical properties of magnesium and calcium hydroxides: the role of covalency and many-body effects. Physica Scripta. ISSN 0031-8949. 90:094015(9). doi: 10.1088/0031-8949/90/9/094015. Full text in Research Archive
• Narra, Vamsi K; Ullah, Habib; Singh, Varun K; Giribabu, Lingamallu; Senthilarasu, S & Karazhanov, Smagul [Show all 9 contributors for this article] (2015). D-π-A system based on zinc porphyrin dyes for dye-sensitized solar cells: Combined experimental and DFT-TDDFT study. Polyhedron. ISSN 0277-5387. 100, p. 313–320. doi: 10.1016/j.poly.2015.08.035. Full text in Research Archive

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• Karazhanov, Smagul; Vante, Nicolas Alonso & Das, Santanu (2021). Book of abstracts of the online international school "“DESIGN FABRICATION AND APPLICATIONS OF SOLAR ENERGY CONVERSION DEVICES" (December 1-3, 2021). Institutt for energiteknikk. ISBN 9788251837361. 62 p. Full text in Research Archive

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• Karazhanov, Smagul; Rougier, Aline; Dam, Bernard & Capon, Fabien (2022). Organizing the Symposium M "Chromogenic Materials and Devices" at E-MRS Spring Meeting in May 30-June 4, 2022 in Strassbourg, France (to be held in 2021, but because of covid-19 shifted to 2022. [Journal]. Strassbourg, France. Full text in Research Archive
• Mamedov, Damir & Karazhanov, Smagul (2022). Modification of CeO2 by doping for glass industry applications: ab-initio study. Full text in Research Archive
• Karazhanov, Smagul & Vante, Nicolas Alonso (2022). Topical issue "Materials and Processes for Production of Solar Hydrogen” in the Elsevier journal Materials Letters. Materials Letters. ISSN 0167-577X. Full text in Research Archive
• Pishtshev, Aleksandr; Strugovshchikov, Evgenii & Karazhanov, Smagul (2022). Physics and crystal chemistry of rare-earth metal oxyhydride systems. Full text in Research Archive
• Strugovshchikov, Evgenii; Pishtshev, Aleksandr & Karazhanov, Smagul (2021). First-principles studies on rare-earth metal-hydride-based smart materials. Full text in Research Archive
• Karazhanov, Smagul; Das, Santanu & Vante, Nicolas Alonso (2021). Organizing the second online international school "“DESIGN FABRICATION AND APPLICATIONS OF SOLAR ENERGY CONVERSION DEVICES" (December 1-3, 2021) within the project “Complex of online and onsite lectures on materials for hydrogen generation by solar water splitting” (COOL LONGBOAT). Full text in Research Archive
• Pishtshev, Aleksandr; Strugovshchikov, Evgenii & Karazhanov, Smagul (2021). New, exotic materials Getting oxygen into yttrium hydrides. Research Outreach. ISSN 2517-7028. p. 1–2. doi: 10.32907/RO-122-1291164836. Full text in Research Archive
• Roshaninejad, Parisa; Mamedov, Damir; Karazhanov, Smagul & Zavorotynska, Olena (2021). Polarized Raman studies of CeO2 thin films. Full text in Research Archive
• Vijayan, Athira; Ragavendran, V.; Mayandi, Jeyanthinath & Karazhanov, Smagul (2021). Analysis of different concentration of TiCl4 treated with TiO2 as photoanode for dye-sensitized solar cell application. Full text in Research Archive
• Ramakrishnan, K.; Gayathri, V; Aravinthkumar, V.; Ramachandran, K; Ajitha, B. & Rameshbabu, M [Show all 10 contributors for this article] (2021). TiO2/CeO2 Core/Shell Nanostructures for Photocatalytic and Photo Electrochemical Applications. Full text in Research Archive
• Mamedov, Damir; Karazhanov, Smagul & Vante, Nicolas Alonso (2021). Factors affecting the photocatalytic process. Full text in Research Archive
• Kuvshinov, Mikhail; Karazhanov, Smagul; Hallsteinsen, Ingrid & Chatzitakis, Athanasios (2021). Synthesis and characterization of Ni-Mo alloy for applications as cathodes in photoelectrochemical (PEC) cells. Full text in Research Archive
• Kumar, K. Vinoth; Banu, Aseema; Karazhanov, Smagul & Jose, Sujin P. (2021). The First-principles approach on Platinum doped iron carbide for the hydrogen evolution reaction. Full text in Research Archive
• Aravinthkumar, V.; Babu, G. Anandha; Navaneethan, M.; Karazhanov, Smagul & Mohan, C. Raja (2021). Impurity defects in chromium (Cr) doped SrTiO3 nanoparticles for dye-sensitized solar cell (DSSC) and photocatalytic dye degradation. Full text in Research Archive
• Mamedov, Damir & Karazhanov, Smagul (2021). Theoretical study of electronic structure, optical properties and wettability of CeO2. Full text in Research Archive
• Knudsen, Tina; Zavorotynska, Olena & Karazhanov, Smagul (2021). Characterisation of YHO films with Raman spectroscopy. Full text in Research Archive
• Zavorotynska, Olena (2021). Structural characterization of energy-related materials. Full text in Research Archive
• Thorstensen, Bernt & Karazhanov, Smagul (2021). Titania photocatalysis. What can we learn, both process wise and material wise, from simple experiments. Full text in Research Archive
• Das, Santanu & Karazhanov, Smagul (2021). Pt-free electrodes for applications in electrochemical hydrogen generation. Full text in Research Archive
• Chatzitakis, Athanasios (2021). Fuel(s) from the Sun. Full text in Research Archive
• Karazhanov, Smagul; Zavorotynska, Olena & Chatzitakis, Athanasios (2021). Organizing online international school "Materials and processes for production of solar hydrogen" within the “Complex of online and onsite lectures on materials for hydrogen generation by solar water splitting” med acronym” (COOL LONGBOAT) project. Full text in Research Archive
• Vante, Nicolas Alonso & Karazhanov, Smagul (2021). Photo(electro)catalysis - Introductory aspects: Electrochemical and Photoelectrochemical cells. Full text in Research Archive
• Norby, Truls (2021). Electrode kinetics in fuel cells and electrolyzers. Full text in Research Archive
• Karazhanov, Smagul (2021). Oxyhydrides: synthesis, characterization and applications. Full text in Research Archive
• Karazhanov, Smagul (2021). Photovoltaic modules: applications and challenges. Full text in Research Archive
• Karazhanov, Smagul (2021). Emerging solar cells, design, applications, and Challenges. Full text in Research Archive
• Karazhanov, Smagul (2021). Artificial photosynthesis: State of Research, Scientific-Technological Challenges and Perspectives. Full text in Research Archive
• Kageyama, Hiroshi & Karazhanov, Smagul (2021). Mixed anion materials. Full text in Research Archive
• Karazhanov, Smagul (2019). Yttrium oxyhydride-based nanomaterials. Full text in Research Archive
• Karazhanov, Smagul (2019). Symposium “Advanced Functional Materials”. Full text in Research Archive
• Karazhanov, Smagul & Marstein, Erik Stensrud (2019). Nanomaterials for energy conversion and energy saving applications. Full text in Research Archive
• Amenedo, José Montero; Baba, Elbruz Murat & Karazhanov, Smagul (2019). Photochromic oxy-hydrides for smart fenestration: the case of yttrium oxy-hydride. Full text in Research Archive
• Karazhanov, Smagul; Cremades, Ana & Ton-That, Cuong (2019). Metal oxide- and oxyhydride-based nanomaterials for energy and environment-related applications. Full text in Research Archive
• Mamedov, Damir; Baba, Elbruz Murat & Karazhanov, Smagul (2019). Structural properties, electronic structure and optical properties of cerium oxyhydride. Full text in Research Archive
• Mamedov, Damir; Baba, Elbruz Murat; Marstein, Erik Stensrud & Karazhanov, Smagul (2019). Electronic properties of CeO2 with intrinsic and extrinsic point defects. Full text in Research Archive
• Karazhanov, Smagul (2018). Theoretical and experimental study of photochromic yttrium oxyhydride. Full text in Research Archive
• Karazhanov, Smagul (2018). Materials research for solar cells and smart windows by first-principles calculations. Full text in Research Archive
• Bjørk, Christopher; Karazhanov, Smagul; Tecedor, Miguel; Hurtado, Felix; Vasquez, Cristian & Cremades, Ana [Show all 7 contributors for this article] (2016). Nanoteknologi skal gjøre solceller billigere. [Internet]. http://siu.no/For-media/Nyheter-fra-SIU/Nanoteknologi-skal-g. Full text in Research Archive
• Karazhanov, Smagul (2015). Invited Lecture “Introduction to DFT calculations. Surface related problems and other cases of application”. Full text in Research Archive
• Karazhanov, Smagul (2015). Modeling of materials properties. Full text in Research Archive
• Pishtshev, Aleksandr & Karazhanov, Smagul (2015). New insight into common materials - magnesium and calcium hydroxides: Multifunctionality driven by the electronic charge localization. Full text in Research Archive
• Arici, Elif; Ergun, R.; Karaagac, H.; Mingazov, Azat; Klopov, M. & Subrahmanyan, A. [Show all 7 contributors for this article] (2015). Theoretical and experimental study of Cu2ZnSnS4: synthesis and characterization. Full text in Research Archive
• Karazhanov, Smagul (2015). DFT and device modeling. Full text in Research Archive
• Karazhanov, Smagul; Mongstad, TT; Martinsen, Fredrik Aleksander; Amenedo, J. M.; Zayim, E. O. & Mohseni, A. [Show all 15 contributors for this article] (2015). Photochromic Materials & Applications. Full text in Research Archive
• Karazhanov, Smagul (2015). Optical properties of Si/TiO2 composite nanoparticles. Full text in Research Archive
• Karazhanov, Smagul (2015). Lecture «Introduction to DFT calculations. Surface related problems and other cases of application». Full text in Research Archive
• Karazhanov, Smagul (2015). Introduction to photovoltaics, wafer-based and thin film solar cells. Full text in Research Archive
• Karazhanov, Smagul (2015). Metal hydrides for smart window applications. Full text in Research Archive
• Karazhanov, Smagul (2015). Materials for Energy saving applications. Full text in Research Archive
• Karazhanov, Smagul; Mingazov, Azat & Ganchenkova, Maria (2015). Study of materials properties for Cu2ZnSn(S,Se)4 from first-principles calculations. Full text in Research Archive
• Karazhanov, Smagul (2015). DFT and device modeling. Full text in Research Archive
• Karazhanov, Smagul; Ibragimova, Rina & Ganchenkova, Maria (2015). Electronic properties of SnS from first principles calculations. Full text in Research Archive
• Karazhanov, Smagul (2015). Introduction to DFT calculations: Surface related problems and other cases of application. Full text in Research Archive
• Karazhanov, Smagul; Pishtshev, Aleksandr & Klopov, Mihhail (2015). magnesium and calcium hydroxides for solar cell applications. Full text in Research Archive
• Karazhanov, Smagul; Ganchenkova, Maria & Marstein, Erik Stensrud (2014). Electronic properties of hydrogen-doped Silicon. Full text in Research Archive
• Vazquez, G. C.; Karazhanov, Smagul; Peche-Herrero, M. Andrea; Maestre, David; Cremades, Ana & Ramírez-Castellanos, Julio [Show all 8 contributors for this article] (2014). DFT studiesof pointdefectsin TiO2. Full text in Research Archive
• Marstein, Erik Stensrud & Karazhanov, Smagul (2014). CZTS-teknologi kan redde solcellene fra Kinas jordart-monopol. [Internet]. http://www.tu.no/. Full text in Research Archive
• Karazhanov, Smagul (2014). Computational Materials Science. Full text in Research Archive
• Omer, Ayman; Karazhanov, Smagul & Mamedov, Damir (2022). Theoretical study of Sb2Se3 -based solar cells by device modelling. National Research Nuclear University "MEPhI". Full text in Research Archive
• Dicel, Ayse & Karazhanov, Smagul (2021). Encapsulation yttrium oxyhydride by metal oxide and polymer coatings. Istanbul Technical University. Full text in Research Archive
• Strugovshchikov, Evgenii; Karazhanov, Smagul & Pishtshev, Aleksandr (2021). First-principles studies on rare-earth metal-hydride-based smart materials. University of Tartu. Full text in Research Archive
• Karazhanov, Smagul; Vante, Nicolas Alonso & Thorstensen, Bernt (2021). Report on AURORA project 308903 "Yttrium oxyhydride for hydrogen generation by solar water splitting" funded by the Research Council of Norway. Institutt for energiteknikk. Full text in Research Archive
• Knudsen, Tina; Zavorotynska, Olena; Karazhanov, Smagul & Baba, Elbruz Murat (2021). Study of Photochromic Effect in Yttrium Oxyhydride Films. Universitetet i Stavanger. Full text in Research Archive Show summary

  Mixed anion compounds have multiple different anions as part of their structure. Due to the different nature of individual anions the mixed anion compounds may exhibit other properties than the well known single anion compounds (examples being oxides and hydrides). One group of the relatively new field of mixed anion compounds is the oxyhydrides. The oxyhydrides contain both H− and O2− anions. In this work yttrium oxyhydride (YHO), regarded as one of the rare-earth oxyhydrides (RE-O-H), was studied. This compound had already been observed to have interesting photochromic (PC) properties when illuminated by UV and visible light. A complete understanding on the origin of the PC effect and its limitations had although not yet been established. The aim of this thesis was to study thin films of YHO on glass before and after UV- illumination to understand more of the color changing mechanism. Thin films of YHO deposited by reactive magnetron sputtering were studied by the methods of Raman spec- troscopy, X-ray diffraction (XRD) and cyclic optical testing. Some films coated with thin layers of palladium (Pd) were studied with regards to electrical resistivity as well. The latter was an attempt on revealing whether hydrogen diffusion takes part in the photodarkening. The electrical measurements were performed with a four point probe. The thin films of YHO were observed to easily burn when exposed to lasers of wavelength 532 and 633 nm. From Raman measurements within the damaged spots on the film it was clear that the sample had been destroyed by the lasers. Thus, a large part of this work was related to optimizing the measurement conditions for Raman spectroscopy. The Raman peaks of the obtained spectra before and after UV exposure were assigned by literature study on similar compounds and factor group analysis (FGA). The average grain size of the films was estimated by the Scherrer equation from the diffractograms obtained by XRD. Average grain size was shown to decrease with increasing deposition pressure. The experimental diffraction patterns were compared to reference patterns of yttrium hydrides and yttria in addition to theoretical patterns of different YHO structures. Raman and XRD showed possible hydrogen distortion after UV-illumination performed in Ar atmosphere and the possibility of multiple crystal structures present.

• Yaseen, Anisa; Karazhanov, Smagul; Kuznetsov, Andrej & Cremades, Ana (2020). Polymer-Silicon Interface Study. Universitetet i Oslo. Full text in Research Archive
• Palchikov, A. & Karazhanov, Smagul (2018). Theoretical study of the Zn-Cd-O system for the polarization photovoltaic devices. Department of Materials Science, National Research Nuclear University "MEPhI". Full text in Research Archive

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