Functionalization of conducting oxides by ion beam and defect engineering
The goal of the FUNCTION project is to develop novel oxide-based functionality compatible with the prevailing silicon technology for Photovoltaics (PV) devices by understanding and manipulating the electro-optical interaction between embedded semiconducting nanocrystals and a conductive oxide host material.
About the Project
A paramount challenge facing our common global future is access to sufficient supply of clean energy. Global energy demand is expected to double by year 2050 and the electricity demands will even triple. In this respect, solar energy conversion using PV is an outstanding alternative and a large scale industrial sector has emerged, almost exclusively
based on silicon-technology. However, the performance of Si solar cells is fundamentally limited by their conversion efficiency. Hence, disruptive innovations are required for further (and true) penetration of fossil-free energy production, but also for storage, conversion and distribution.
Different concepts have been suggested to overcome the Shockley-Queisser limit for conversion efficiency, such as implementation of high cost tandem cells, introduction of impurity band and intermediate band devices, hot electron extraction, and carrier multiplication (CM). An intriguing approach is to join one or more of these new concepts with the prevailing silicon technology. For instance, there is today a trend towards replacing the isolating Si-nitride-based anti-reflective (AR) coating with a transparent conductive oxide (TCO) layer; as a result, charge collection is enhanced and shadowing effects caused by the contact metal fingers are reduced. Moreover, this also opens up a multitude of possibilities to add new functionalities utilizing oxide semiconductors.
FUNCTION aims to increase efficiency and lower costs of PVs through the use of abundant and environmentally friendly materials. The proposed route to these goals is the functionalization of TCOs through embedding of semiconducting nanoparticles. The functionalized TCO can then be integrated in a larger heterostructure device, building on existing Si-based technology.
The Project is led by UiO and will run for 3 years.
The Research Council of Norway.
- Cecilie Skjold Granerød; Bjørn Lupton Aarseth; Phuong Dan Nguyen; Kalliopi Bazioti; Alexander Azarov; Bengt Gunnar Svensson; Lasse Vines & Øystein Prytz (2019). Structural and optical properties of individual Zn2GeO4 particles embedded in ZnO. Nanotechnology. ISSN 0957-4484. 30, s 1- 6
- Phuong Dan Nguyen; Cecilie Skjold Granerød; Bjørn Lupton Aarseth; Kalliopi Bazioti; Alexander Azarov; Bengt Gunnar Svensson; Lasse Vines & Øystein Prytz (2019). Structural and optical properties of individual Zn2GeO4 particles embedded in ZnO.
- Kristian Haug; Phuong Dan Nguyen; Ole Bjørn Karlsen; Thomas Aarholt; Kalliopi Bazioti & Øystein Prytz (2019). Zinc ferrite spinel embedded in ZnO matrix for solar applications.
- Kristian Haug (2019). Functionalization of transparent conducting oxides. Zinc ferrite spinel in ZnO.