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Field modulation in Na-incorporated Cu(In,Ga)Se2 (CIGS) polycrystalline films influenced by alloy-hardening and pair-annihilation probabilities

Jeong, Yonkil and Kim, Chae-Woong and Park, Dong-Won and Jung, Seung Chul and Lee, Jongjin and Shim, Hee-Sang (2011) Field modulation in Na-incorporated Cu(In,Ga)Se2 (CIGS) polycrystalline films influenced by alloy-hardening and pair-annihilation probabilities. NANOSCALE RESEARCH LETTERS, 6 (1). pp. 1-6. ISSN 1931-7573 (Print) 1556-276X (Online)

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Official URL: http://www.nanoscalereslett.com/content/6/1/581

Abstract

The influence of Na on Cu(In,Ga)Se2 (CIGS) solar cells was investigated. A gradient profile of the Na in the CIGS absorber layer can induce an electric field modulation and significantly strengthen the back surface field effect. This field modulation originates from a grain growth model introduced by a combination of alloy-hardening and pair-annihilation probabilities, wherein the Cu supply and Na diffusion together screen the driving force of the grain boundary motion (GBM) by alloy hardening, which indicates a specific GBM pinning by Cu and Na. The pair annihilation between the ubiquitously evolving GBMs has a coincident probability with the alloy-hardening event.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
ID Code:11587
Deposited By:M T V
Deposited On:05 Jan 2012 10:32
Last Modified:05 Jan 2012 10:32

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