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To establish reliable model for long term reliability of a-Si:H PV module, outdoor field aging results and indoor light soaking test has been investigated. For the appropriate comparisons, one type of outdoor system modules and test cells has been fabricated from the same commercial module production line. Severe early stage degradation in outdoor site has been resulted and compared to the indoor...
Effects of crystallinity of the p window layers in the pin solar cells having hydrogenated microcrystalline silicon (μc-Si:H) films as an absorber layer on solar cell performance are investigated through the evaluation of the photovoltaic characteristics of solar cells prepared by varying the gas ratio of SiH4/H2 during the p layer deposition. By Raman scattering spectroscopy analysis, it is observed...
The passivation characteristic of c-Si wafer with thin a-Si:H layer plays key parameter in a-Si:H/c-Si hetero-junction (HJ) solar cells. The significance of passivation depends not only on the quality of a-Si layers but also condition of c-Si substrate surface. C-Si substrates are textured to pyramid shape for effective absorption of light using NaOH or KOH with IPA. Textured c-Si substrates are different...
The n-type hydrogenated microcrystalline silicon-incorporated silicon oxide (n-μc-SiO:H) films are prepared by 13.56 MHz plasma enhanced chemical vapor deposition (rf-PECVD) using SiH4, H2 and CO2 gases for an inter-layer between the amorphous silicon (a-Si:H) top-cell and the microcrystalline silicon (μc-Si:H) bottom-cell in the thin-film silicon tandem solar cells. The optical and electrical properties...
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