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Hydrothermal synthesis and fast photoresponsive characterization of SnS2 hexagonal nanoflakes
- Tian, He, Fan, Chao, Liu, Gangzha, Zhang, Yonghui, Wang, Mengjun, Li, Erping
- Journal of materials science 2019 v.54 no.3 pp. 2059-2065
- detectors, hot water treatment, molybdenum disulfide, photovoltaic cells, prototypes, tin
- As an emerging material of layered metal dichalcogenides (LMDs), tin disulfide (SnS₂) has huge potentials in visible-light detectors and photovoltaic devices due to its 2.0–2.6 eV band gap. However, its photoresponsive characteristic is still relative rarely investigated compared to other LMDs, such as MoS₂. Herein, SnS₂ nanoflakes are synthesized by a facile and fruitful hydrothermal method, and photoresponsive characteristics are investigated. At first detailed phase structure, morphology and constitution are characterized. This SnS₂ is flake-like with a mean diameter of ~ 500 nm, and the atomic ratio of Sn to S is 1:2.1. Furthermore, prototype photodetectors are fabricated and characterized to explore photoresponsive characteristics of these SnS₂ nanoflakes. The results show that SnS₂ nanoflakes have excellently stable and repeatable photoresponse property to 532 nm and 405 nm incidents. In particular, it reveals a fast response time of 7.3 ms to the 405 nm incident, which enables SnS₂ nanoflakes promising candidate for photodetectors.