Mapping Current Collection in Cross Section: The case of Copper- doped CdTe Solar Cells
| Autor: | Niranjana Mohan Kumar, Eric Colegrove, Barry Lai, Trumann Walker, Mariana I. Bertoni, Michael Stuckelberger, Tara Nietzold, Abdul R. Shaik |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science business.industry Doping Photovoltaic system chemistry.chemical_element 02 engineering and technology Activation energy 021001 nanoscience & nanotechnology 01 natural sciences Copper Cadmium telluride photovoltaics law.invention chemistry law Metastability 0103 physical sciences Solar cell Optoelectronics Grain boundary 0210 nano-technology business |
| Zdroj: | 2020 47th IEEE Photovoltaic Specialists Conference (PVSC). |
| DOI: | 10.1109/pvsc45281.2020.9300979 |
| Popis: | For decades, copper has been used to improve the performance of cadmium telluride thin film solar cells. However, it has also been shown to be the main cause of metastability in CdTe. Recently a low activation energy has been reported for the thermal diffusion of Cu in CdTe explaining the ease of motion that it has under moderate temperatures. The community consensus is that copper segregates to the absorber grain boundaries, where it's either beneficial or detrimental to device performance depending on its concentration. Using nanoscale X-ray micrsocopy and a two-dimensional drift-diffusion model we present a preliminary correlation between local copper distribution and electrical performance of a single-junction CdTe/CdS solar cell. |
| Databáze: | OpenAIRE |
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