Study of Bandgap Profiling Control on Photovoltaic Performance in the Three Stacked Amorphous Solar Cells

Author:

Nakata Y.,Sannomiya H.,Moriuchi S.,Yokota A.,Inoue Y.,Itoh M,Itoh H

Abstract

ABSTRACTA series of systematic experiments has been made on a bandgap profiling control using a-SiGe and a-SiC cells to clarify the cause for the improvement of the photovoltaic performance by the bandgap profiling in the photovoltaic active layer. It has been shown from the analysis that the most important contribution to the cell performance is an optimization of the ambipolar carrier collection by the bandgap profiling. On the basis of the results, an efficiency of 10.1% was obtained at the promising a-SiC/a-Si/ a-SiGe multi-bandgap stacked cell by the bandgap profiling.

Publisher

Springer Science and Business Media LLC

Subject

General Engineering

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