Proceedings of Online nanoGe Fall Meeting 20 (OnlineNFM20)
Publication date: 4th October 2020
Four terminal (4T) tandem solar cells generally suffer from parasitic absorption in their three obligatory transparent electrodes. Using highly optimized transparent conductive oxides (TCOs) such as hydrogen-doped indium oxide (IO:H) as electrode materials can reduce the parasitic absorption. [1] However, the sensitive layers of the perovskite cell limit the freedom of choice for the rear electrode to materials that are softly processed at low temperatures. Room-temperature-sputtered indium zinc oxide (IZO) is a suitable rear electrode material, but exhibits non-ideal absorption in the near-infrared. This study investigates, how reducing the thickness of the IZO electrode benefits the power conversion efficiency (PCE) of 4T perovskite-CIGS tandem solar cells. A metal finger-shaped grid on the rear of the 0.5 cm² sized perovskite top cell compensates for the resistive losses in the thinned IZO layers. Reducing the rear electrode thickness from 162 nm down to 54 nm and 34 nm significantly improves the transmittance of the top cell to over 90% maximum while maintaining its PCE at over 15%. With this approach we are able to push the PCE of the complete 4T perovskite-CIGS tandem device up to 23.8%.
This project has received funding from the European Union‘s Horizon 2020 research and innovation programme under grant agreement N° 850937 PERCISTAND and from the Federal Ministry of Economic Affairs and Energy under contract No 03EE1038A CAPITANO.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.