Effect of hydrogen dilution on the structure of amorphous silicon alloys

We investigate why high levels of hydrogen dilution of the process gas lead to enhanced light soaking stability of amorphous silicon (a-Si) alloy solar cells by studying the microstructural properties of the material using high-resolution transmission electron microscopy (TEM) and Raman spectroscopy...

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Bibliographic Details
Published in:Applied physics letters 1997-09, Vol.71 (10), p.1317-1319
Main Authors: Tsu, D. V., Chao, B. S., Ovshinsky, S. R., Guha, S., Yang, J.
Format: Article
Language:English
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Summary:We investigate why high levels of hydrogen dilution of the process gas lead to enhanced light soaking stability of amorphous silicon (a-Si) alloy solar cells by studying the microstructural properties of the material using high-resolution transmission electron microscopy (TEM) and Raman spectroscopy. The TEM results show that a-Si alloy (with or without hydrogen dilution) is a heterogeneous mixture of amorphous network and linear-like objects that show evidence of order along their length. The volume fraction of these ordered regions increases with increasing hydrogen dilution.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.119928