Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Structural, morphological, optical, and photosensing properties of Cs2TeI6 thin film synthesized by two-step dry process

  • Hoat, Phung Dinh (School of Materials Science and Engineering, Kyungpook National University (KNU)) ;
  • Van Khoe, Vo (School of Materials Science and Engineering, Kyungpook National University (KNU)) ;
  • Bae, Sung-Hoon (School of Materials Science and Engineering, Kyungpook National University (KNU)) ;
  • Lim, Hyo-Jun (School of Materials Science and Engineering, Kyungpook National University (KNU)) ;
  • Hung, Pham Tien (Department of Physics, Le Quy Don Technical University) ;
  • Heo, Young-Woo (School of Materials Science and Engineering, Kyungpook National University (KNU))
  • Received : 2021.09.06
  • Accepted : 2021.09.22
  • Published : 2021.09.30
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Abstract

Recently, cesium tellurium iodine (Cs2TeI6) has emerged as an inorganic halide perovskite material with potential application in optoelectronic devices due to its high absorption coefficient, suitable bandgap and because it consists of nontoxic and earth-abundant elements. However, studies on its fabrication process as well as photoresponse characteristics are limited. In this study, a simple and effective method is introduced for the synthesis of Cs2TeI6 thin films by a two-step dry process. A Cs2TeI6-based lateral photosensor was fabricated, and its photoresponse characteristics were explored under laser illuminations of four different wavelengths in the visible range: 405, 450, 520, and 655 nm. The initial photosensing results suggest potential application and can lead to more promising studies of Cs2TeI6 film in optoelectronics.

Keywords

Acknowledgement

The work was financially supported by Kyungpook National University Development Project Research Fund, 2018.

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