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Light-induced structural changes in hydrogenated amorphous silicon

T. A. ABTEW1,* , D. A. DRABOLD1,*

Affiliation

  1. Department of Physics and Astronomy, Ohio University, Athens Ohio 45701, USA

Abstract

A direct ab initio calculation of network dynamics and diffusion both for the ground state and light excited state for a-Si:H was performed. In the light excited state there was observed enhanced hydrogen diffused and formation of new silicon dihydride configurations: (H-Si Si-H)2(H-Si Si-H) and SiH2. For the first time, we show the detailed dynamic pathways that arise from light induced occupation changes, and provide one explicit example of defect creation and paired H formation..

Keywords

a+Si:H, Light-induced structural changes, Network dynamic.

Submitted at: Oct. 27, 2006
Accepted at: Nov. 2, 2006

Citation

T. A. ABTEW, D. A. DRABOLD, Light-induced structural changes in hydrogenated amorphous silicon, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 6, pp. 1979-1988 (2006)