Comparison of the Thermal Stability of Differently Buffered CIGSe Solar Cells
| Autor: | Christian A. Kaufmann, Tim Kodalle, Tobias Bertram, Hasan A. Yetkin, Bernd Szyszka, Alejandra Villanueva-Tovar, Rutger Schlatmann, Reiner Klenk |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Tandem business.industry Photovoltaic system Energy conversion efficiency 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Amorphous solid Stress (mechanics) 0103 physical sciences Optoelectronics Degradation (geology) Thermal stability Thin film 0210 nano-technology business |
| Zdroj: | 2020 47th IEEE Photovoltaic Specialists Conference (PVSC). |
| Popis: | In this contribution the impact of thermal stress on Cu(In,Ga)Se 2 (CIGSe) thin film photovoltaic devices is investigated. The tolerance of such devices to high temperatures is of particular interest for their potential use as bottom devices in tandem applications in order to overcome the theoretical efficiency limit of single junction solar cells. When CdS-buffered CIGSe high efficiency solar cells are subjected to thermal stress, elemental interdiffusion of Na and Cd between the absorber and the window layers as well as chemical reactions at the CIGSe/CdS interface result in a degraded power conversion efficiency (PCE). Here, we compare the degradation mechanisms of CdS and amorphous GaO x buffered CIGSe solar cells under thermal stress. A model explaining the observed degradation behaviours is proposed. |
| Databáze: | OpenAIRE |
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