Good stability of protocrystalline silicon multilayer solar cells against light irradiation originating from vertically regular distribution of isolated nano-sized silicon grains

Authors

Seung Yeop Myong, Korea Advanced Institute of Science and Technology
Seong Won Kwon, Korea Advanced Institute of Science and Technology
Joong Hwan Kwak, Korea Advanced Institute of Science and Technology
Koeng Su Lim, Korea Advanced Institute of Science and Technology
Joshua M. Pearce, Clarion UniversityFollow
Makoto Konagai, Tokyo Institute of Technology

Document Type

Conference Proceeding

Publication Date

1-1-2006

Volume

2

Journal

Conference Record of the 2006 IEEE 4th World Conference on Photovoltaic Energy Conversion, WCPEC-4

First Page

1584

URL with Digital Object Identifier

10.1109/WCPEC.2006.279788

Last Page

1587

Abstract

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.