Preparation and photoelectric properties of SnTe nanofilm

Liyuan Song; Libin Tang; Qun Hao; Chunli Yang; Kar Seng Teng; Haipeng Wang; Junbin Li

doi:10.1117/12.2620629

8 July 2022 Preparation and photoelectric properties of SnTe nanofilm

Liyuan Song, Libin Tang, Qun Hao, Chunli Yang, Kar Seng Teng, Haipeng Wang, Junbin Li

Proceedings Volume 12284, 2021 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications; 1228405 (2022) https://doi.org/10.1117/12.2620629
Event: 2021 International Conference on Optical Instruments and Technology, 2022, Online Only

Abstract

As a topological crystal insulator, tin telluride (SnTe) has unique properties that are different from those of traditional topological insulators. Due to its helical multi-surface states, strong topological protection characteristics, gapless topological surface states, narrow bulk band gap, high mobility at room temperature and other excellent properties, SnTe has a great application potential in photodetectors with minimal energy consumption, broad spectrum and ultra-fast response. However, the preparation of large area high quality SnTe nanofilms is still a big challenge. Here, we report a facile and efficient preparation method for large area SnTe nanofilm (2 cm ×2 cm) by RF magnetron sputtering method. The nanofilm having a thickness of 5.8 nm and surface roughness of 0.51 nm was obtained. Moreover, the prepared nanofilm was crystallized without annealing treatment and exhibited uniform surface. The photoconductive prototype device based on the SnTe nanofilm demonstrated a significant photoelectric response under an illumination of 365, 555 and 850 nm light source at room temperature. Furthermore, the ultraviolet, visible and near infrared photoelectric performance of the device remained stable even after six months in the atmosphere of the drying cabinet. These results indicate that the SnTe nanofilm has potential applications in broad spectrum photodetectors.

Citation Download Citation

Liyuan Song, Libin Tang, Qun Hao, Chunli Yang, Kar Seng Teng, Haipeng Wang, and Junbin Li "Preparation and photoelectric properties of SnTe nanofilm", Proc. SPIE 12284, 2021 International Conference on Optical Instruments and Technology: IRMMW-THz Technologies and Applications, 1228405 (8 July 2022); https://doi.org/10.1117/12.2620629

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KEYWORDS

Tellurium

Tin

Sputter deposition

Crystals

Near infrared

Absorption

Raman spectroscopy

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