TY - JOUR
T1 - The Cu Concentration effect on the electro-optical properties of Cu2ZnSnSe4 thin films prepared by a non-vacuum solution-based nano-inks process
AU - Lee, Pay Yu
AU - Chang, Sheng Po
AU - Hsu, En Hao
AU - Chang, Shoou Jinn
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014/1
Y1 - 2014/1
N2 - 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 7.65×10-7 A when a bias of 10 V was applied.
AB - 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 7.65×10-7 A when a bias of 10 V was applied.
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U2 - 10.1166/sam.2014.1676
DO - 10.1166/sam.2014.1676
M3 - Article
AN - SCOPUS:84896930651
SN - 1947-2935
VL - 6
SP - 18
EP - 26
JO - Science of Advanced Materials
JF - Science of Advanced Materials
IS - 1
ER -