Activation of Thin Film CdTe Solar Cells Using a Cadmium Bromide Treatment
| Autor: | Jake W. Bowers, Rachael Greenhalgh, Walajabad S. Sampath, Kurt L. Barth, John M. Walls, Amit Munshi, Ali Abbas, Tushar M. Shimpi |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Bromine Cadmium bromide Annealing (metallurgy) Energy conversion efficiency Analytical chemistry chemistry.chemical_element 02 engineering and technology Cadmium chloride 021001 nanoscience & nanotechnology 01 natural sciences Cadmium telluride photovoltaics chemistry.chemical_compound chemistry 0103 physical sciences Grain boundary Thin film 010306 general physics 0210 nano-technology |
| Zdroj: | 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC). |
| DOI: | 10.1109/pvsc.2018.8547756 |
| Popis: | The activation of CdTe with a cadmium chloride annealing treatment is a vital step in the fabrication of high efficiency solar cells. Thin film MZO/CdTe cells have been activated using CdBr 2 instead of CdCl 2 with a lower activation process temperature. Using this method, CdBr 2 does activate the cell as revealed by J-V and EQE measurements. TEM and EDX elemental maps from device cross-sections confirm that bromine is present in the grain boundaries. TEM shows that the treatment removes stacking faults at 425 °C. CdBr 2 treatment resulted in a relatively modest conversion efficiency of 5.49% when treated at 375 °C. Nevertheless, the experiments shed further light on the mechanisms involved in the activation. |
| Databáze: | OpenAIRE |
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