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Improvement of a-Si solar cells fabricated by mercury-sensitized photo-CVD using H/sub 2/ dilution method
Description
The high quality-wide bandgap i-layers prepared by the hydrogen dilution method were applied to a-Si solar cells fabricated by mercury-sensitized photo-CVD. It was found that the initial efficiency and stability of the cells were significantly improved compared to the undiluted one. This improvement was due to the increase in the quality and stability of an i-layer as confirmed by the dark I-V characteristics measurement of the solar cell. Two techniques for increasing the stabilized efficiency of the H/sub 2/-diluted i-layer-based solar cell were employed. First, the use of appropriate bandgap profile leads to the increase in J/sub ac/ while maintaining high FF, resulting in the increase in the stabilized efficiency. Another one is the improvement of V/sub oc/ of the solar cell by the optimization of the p- and buffer layer. By lowering the temperature of p- and buffer layers, a solar cell with V/sub oc/ as high as 0.990 V has been obtained.
Journal
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- Proceedings of 1994 IEEE 1st World Conference on Photovoltaic Energy Conversion - WCPEC (A Joint Conference of PVSC, PVSEC and PSEC)
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Proceedings of 1994 IEEE 1st World Conference on Photovoltaic Energy Conversion - WCPEC (A Joint Conference of PVSC, PVSEC and PSEC) 1 492-495, 2002-12-17
IEEE