Good stability of protocrystalline silicon multilayer solar cells against light irradiation originating from vertically regular distribution of isolated nano-sized silicon grains
Conference Record of the 2006 IEEE 4th World Conference on Photovoltaic Energy Conversion, WCPEC-4
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Photoluminescence and Fourier transform infrared spectra measured at room temperature, and transmission electron microscopy micrographs produce strong evidence that nano-sized silicon grains are embedded in alternately hydrogen-diluted protocrystalline silicon multilayers. We suggest that the vertically regular distribution of isolated nano-sized silicon grains caused by the repeatedly layered structure, as well as the improved structural order in the a-Si:H matrix reduces "slow" metastable defects, resulting in a fast light-induced stabilization with a low degradation. ©2006 IEEE.