Spin-coated kesterite CZTS thin films for photovoltaic applications

被引：0
作者：
L. Majula
N. R. Mlyuka
M. E. Samiji
R. S. Bryce
D. Y. Kim
S. H. Kim
H. J. Lee
H. J. Choi
机构：
[1] University of Dar es Salaam,Physics Department
[2] Heriot Watt University,School of Engineering & Physical Sciences
[3] Edinburgh Campus,School of Advanced Materials Engineering
[4] Kookmin University,undefined
来源：
Journal of the Korean Physical Society | 2015年 / 67卷
关键词：
Copper zinc tin-sulfide (CZTS); Thin film; Photovoltaics; Spin coating; Rapid thermal processing;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Copper zinc tin-sulfide (CZTS) films have been widely studied over recent years due to the inherent advantages of low cost, high absorption coefficient (≥ 104 cm−1), suitable band gap (∼1.5 eV) and nontoxicity. In this work, spin coating was used to obtain CZTS films of various compositions and degrees of crystallization on glass substrates, which were then annealed at 500 °C in a N2 atmosphere by using a rapid thermal processing (RTP) furnace in order to optimize their structure. Non-stoichiometric precursors and low spinning speeds resulted in a lower sheet resistance, which is considered to be a result of lower degree of crystallization. Furthermore, the non-stoichiometric films had a high optical band gap (> 1.66 eV) whereas the band gap of the stoichiometric films (1.4 to 1.6 eV) was close to the optimal value (1.5 eV) for solar-cell applications.
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页码：1078 / 1081
页数：3
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