Solution-based synthesis of high yield CZTS (Cu2ZnSnS4) spherical quantum dots

被引：28
作者：
Rajesh, G. [1 ]
Muthukumarasamy, N. [1 ]
Subramanian, E. P. [2 ]
Venkatraman, M. R. [1 ]
Agilan, S. [1 ]
Ragavendran, V. [3 ]
Thambidurai, M. [4 ]
Velumani, S. [5 ]
Yi, Junsin [6 ]
Velauthapillai, Dhayalan [7 ]
机构：
[1] Coimbatore Inst Technol, Dept Phys, Coimbatore, Tamil Nadu, India
[2] Coimbatore Inst Technol, Dept Chem, Coimbatore, Tamil Nadu, India
[3] Madurai Kamaraj Univ, Sch Chem, Dept Mat Sci, Madurai 625021, Tamil Nadu, India
[4] Seoul Natl Univ, Global Frontier Ctr Multiscale Energy Syst, Dept Elect & Comp Engn, Seoul, South Korea
[5] CINVESTAV, Dept Elect Engn SEES, Mexico City 06730, DF, Mexico
[6] Sungkyunkwan Univ, Coll Informat & Commun Engn, Suwon 440746, South Korea
[7] Univ Coll Bergen, Dept Engn, Bergen, Norway
来源：
SUPERLATTICES AND MICROSTRUCTURES | 2015年 / 77卷
关键词：
Chemical precipitation technique; Quantum dots; High yield; Low temperature; NANOCRYSTALS; EFFICIENCY; FILMS;
D O I：
10.1016/j.spmi.2014.11.016
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
High yield CZTS quantum dots have been synthesized using simple precursors by chemical precipitation technique. Formation mechanism of CZTS spherical quantum dots also has been investigated. According to the mechanism, copper sulfide nuclei firstly forms, and serves as the starting point for the nucleation and growth of CZTS. X-ray diffraction pattern, X-ray photoelectron spectra (XPS) and Raman spectra reveals the formation of pure kesterite structure Cu2ZnSnS4 nanoparticles. HRTEM analysis reveals the formation of CZTS quantum dots with an average particle size of similar to 8.3 nm. The elemental distribution of CZTS quantum dots studied using STEM elemental mapping reveals that Cu, Zn, Sn and S are present in the sample. The photoluminescence spectra of CZTS exhibit a broad red emission band at 657 nm. The optical band gap is shifted to the higher energy side and it shows the presence of quantum confinement effect. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：305 / 312
页数：8
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