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- W2148123721 abstract "CdTe/CdS solar cells have shown great potential for terrestrial solar power applications. To be commercially viable they need to operate efficiently for about 30 years. CdS/CdTe solar cells fabricated at USF have shown record efficiencies upto 16.5% [46]. This research involves the study of thermal stress (TS) and light soaking (LS) on the stability of high efficiency (>10%) solar cells. The change in key electrical parameters Voc, FF, Jsc, A and Jo are quantified for more than 2000 hours of stressing. The device degradation was found to increase with stress temperature for TS. Below 100C, the changes were due to collection and recombination losses. Above 100C, “shunting” mechanisms were found to start affecting the device performance. A fast drop in performance within the first 500 hours was observed. It is believed to be due to an increase in deep-level Curelated defects that increase with stress temperature. Diffusion of Cui ions from the back contact along CdTe grain boundaries had been previously reported [16]. An increase in light/dark J-V crossover and bulk Rs with stress time and temperature was observed. A slow degradation component attributed to Cu-related substitutional defect [23] formation/diffusion to the junction and CdS is proposed. This should compensate the CdS over time and increase its photoconductivity/resistivity." @default.
- W2148123721 created "2016-06-24" @default.
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- W2148123721 date "2005-01-01" @default.
- W2148123721 modified "2023-09-24" @default.
- W2148123721 title "Stability Studies Of CdTe/CdS Thin Film Solar Cells" @default.
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