Crystallization and surface segregation in CuIn0.7Ga0.3Se2 thin films on Cu foils grown by pulsed laser deposition

被引:30
作者
Jo, Yeon Hwa [1 ]
Mohanty, Bhaskar Chandra [1 ]
Cho, Yong Soo [1 ]
机构
[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
关键词
Chalcopyrite; CIGS; Pulsed laser deposition; Solar cells; SOLAR-CELLS; CUINSE2; CU(IN; GA)SE-2; TEMPERATURE; DEPENDENCE;
D O I
10.1016/j.apsusc.2010.02.091
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
This work reports unexpected crystallization and segregation behavior of CuIn0.7Ga0.3Se2 (CIGS) thin films deposited on flexible Cu foils by pulsed laser deposition. A composite-type microstructure containing nanometer-scaled CIGS crystallites embedded in amorphous Cu-rich matrix is observed even at the high temperature of 500 degrees C. The findings are attributed to very fast condensation of the ablated species and random nucleation induced from the amorphous matrix. Cu-rich particulates tend to precipitate on the film surface, and their average size, shape, number density and composition exhibit a strong dependence on the substrate temperature up to 500 degrees C. The similar crystallization properties of the films on Cu foils and glass substrates are noticeable to the use of Cu foils for flexible solar cells. (C) 2010 Elsevier B. V. All rights reserved.
引用
收藏
页码:6819 / 6823
页数:5
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