Cu2ZnSnS4 thin films by simple replacement reaction route for solar photovoltaic application

被引：22
作者：
Tiwari, Devendra [1 ]
Chaudhuri, Tapas K. [1 ]
Ray, Arabinda [2 ]
Tiwari, Krishan Dutt [3 ]
机构：
[1] Charotar Univ Sci & Technol, Dr KC Patel Res & Dev Ctr, Changa 388421, Gujarat, India
[2] Charotar Univ Sci & Technol, PD Patel Inst Appl Sci, Changa 388421, Gujarat, India
[3] Powerdeal Energy Syst India Private Ltd, Nasik 422010, Maharashtra, India
来源：
THIN SOLID FILMS | 2014年 / 551卷
关键词：
Replacement reaction; Copper zinc tin sulfide; Thin film solar cells; Solution deposition; SULFURIZATION; FABRICATION; CELLS;
D O I：
10.1016/j.tsf.2013.11.095
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A process for deposition of Cu2ZnSnS4 (CZTS) films using replacement of Zn2+ in ZnS is demonstrated. X-ray diffraction pattern and Raman spectroscopy confirm the formation of pure CZTS. Atomic force microscopy shows the films to be homogeneous and compact with root mean squared roughness of 6 nm. The direct band gap of CZTS films as elucidated by UV-Vis-NIR spectroscopy is 1.45 eV. The CZTS films exhibit p-type conduction with electrical conductivity of 4.6 S/cm. The hole concentration and hole mobility is determined to be 3.6 x 10(17) cm(-3) and 1.4 cm(2)V(-1) s(-1) respectively. Solar cells with structure: graphite/CZTS/CdS/ZnO/SnO2:In/Soda lime glass are also fabricated, gave photo-conversion efficiency of 6.17% with open circuit voltage and short circuit current density of 521 mV and 19.13 mA/cm(2), respectively and a high fill factor of 0.62. The external quantum efficiency of the solar cell lies above 60% in the visible region. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：42 / 45
页数：4
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