The Cu Concentration effect on the electro-optical properties of Cu2ZnSnSe4 thin films prepared by a non-vacuum solution-based nano-inks process

Pay Yu Lee, Sheng Po Chang, En Hao Hsu, Shoou Jinn Chang

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)18-26
Number of pages9
JournalScience of Advanced Materials
Volume6
Issue number1
DOIs
Publication statusPublished - 2014 Jan

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Fingerprint Dive into the research topics of 'The Cu Concentration effect on the electro-optical properties of Cu<sub>2</sub>ZnSnSe<sub>4</sub> thin films prepared by a non-vacuum solution-based nano-inks process'. Together they form a unique fingerprint.

Cite this