A solution-processed octahedral nano-blocks structure CaIn2S4film for UV/vis photodetection

Ping Rong; Yi Liu; Shiyong Gao; Huiqing Lu; Shuai Ren; Lin Li; Xinzhi Ma; Qicheng Zhou; Junpei Chen; Jinzhong Wang

doi:10.1088/1361-6528/ac5a7f

A solution-processed octahedral nano-blocks structure CaIn₂S₄film for UV/vis photodetection

Nanotechnology. 2022 Mar 25;33(24). doi: 10.1088/1361-6528/ac5a7f.

Authors

Ping Rong¹, Yi Liu¹, Shiyong Gao^{2

1}, Huiqing Lu², Shuai Ren¹, Lin Li², Xinzhi Ma², Qicheng Zhou¹, Junpei Chen¹, Jinzhong Wang¹

Affiliations

¹ School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China.
² Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, People's Republic of China.

PMID: 35240594
DOI: 10.1088/1361-6528/ac5a7f

Abstract

A novel CaIn₂S₄with three-dimensional octahedral nano-blocks (ONBs) are successfully synthesized on fluorine-doped tin oxide (FTO) substrate by a simple hydrothermal method. The CaIn₂S₄ONBs are uniform grown and scattered on the whole FTO substrate with high regular and symmetric morphology as well as average diagonal length of about 600 nm. Based on the as-synthesized CaIn₂S₄ONBs, a photodetector (PD) is fabricated. Satisfyingly, it is found that the CaIn₂S₄ONBs PD achieves a broad-band response ranging from ultraviolet (UV) to visible ( vis) light at zero bias voltage. It is also significant that the CaIn₂S₄ONBs PD enables a fast response, in which the rise time and decay time are less than 0.15 and 0.2 s, respectively. Furthermore, the morphological evolution of the CaIn₂S₄ONBs and plausible UV/vis detection mechanism of the CaIn₂S₄ONBs PD are discussed.

Keywords: CaIn2S4; octahedral nano-blocks; photodetector; ultraviolet/visible.