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http://dx.doi.org/10.46670/JSST.2021.30.5.279

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))
Publication Information
Journal of Sensor Science and Technology / v.30, no.5, 2021 , pp. 279-285 More about this Journal
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
Cesium tellurium iodide ($Cs_2TeI_6$); Halide perovskite; Photosensing properties; Chemical vapor deposition (CVD); Lead-free; Non-solution method;
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