The Cu Concentration Effect on the Electro-Optical Properties of Cu2ZnSnSe4 Thin Films Prepared by a Non-Vacuum Solution-Based Nano-Inks Process

被引：1
作者：
Lee, Pay-Yu [1 ]
Chang, Sheng-Po [1 ]
Hsu, En-Hao [2 ]
Chang, Shoou-Jinn [1 ]
机构：
[1] Natl Cheng Kung Univ, Dept Elect Engn, Ctr Micro Nano Sci & Technol, Adv Optoelect Technol Ctr,Inst Microelect, Tainan 70101, Taiwan
[2] Natl Univ Tainan, Dept Elect Engn, Tainan 700, Taiwan
来源：
SCIENCE OF ADVANCED MATERIALS | 2014年 / 6卷 / 01期
关键词：
Cu2ZnSnSe4; Nanocrystals; Cu; Photodetectors; Ink Solutions; Thin Films; SOLAR-CELL; NANOCRYSTAL INKS; QUANTUM DOTS; PERFORMANCE; CUINSE2; SELENIZATION; FABRICATION;
D O I：
10.1166/sam.2014.1676
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Cu2ZnSnSe4 (CZTSe) nanocrystals (NCs) were synthesized via a coordinating-solvent-based synthesis method using elemental sources. The precipitated NCs were redispersed in toluene to form ink solutions for characterization. The properties of thin films of these inks were investigated as a function of the chemical compositions of the inks. The Cu/(Zn+Sn) ratio of the inks was varied from 0.7 to 1.0, while the Zn/Sn ratio was kept constant at 1. The CZTSe thin film of the ink with a Cu/(Zn+Sn) ratio of 1 exhibited a Cu2-xSe phase. In addition, the absorption edges of the Cu-poor CZTSe thin films (i.e., the films with Cu/(Zn+Sn) ratios of 0.7, 0.8 and 0.9) were red shifted. Photodetectors (PDs) with a Au/CZTSe/soda-lime glass structure were fabricated. The PD corresponding to a Cu/(Zn+Sn) ratio of 0.70 exhibited excellent photoresponsivity, and its dark current was 7.65x10(-7) A when a bias of 10 V was applied.
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页码：18 / 26
页数：9
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