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    2D materials with mixed crystal phase will lead to the nonuniformity of performance and go against the practical application. Therefore, it is of great significance to develop a valid method to synthesize 2D materials with typical stoichiometry. Here, 2D palladium sulfides with centimeter scale and uniform stoichiometric ratio are synthesized via controlling the sulfurization temperature of palladium thin films. The relationship between sulfurization temperature and products is investigated in depth. Besides, the high-quality 2D PdS2 films are synthesized via sulfurization at the temperature of 450-550 °C, which would be compatible with back-end-of-line processes in semiconductor industry with considering of process temperature. The PdS2 films show an n-type semiconducting behavior with high mobility of 10.4 cm2 V-1 s-1 . The PdS2 photodetector presents a broadband photoresponse from 450 to 1550 nm. These findings provide a reliable way to synthesizing high-quality and large-area 2D materials with uniform crystal phase. The result suggests that 2D PdS2 has significant potential in future nanoelectronics and optoelectronic applications. © 2023 Wiley-VCH GmbH.


    Kun He, Weiting Xu, Jingmei Tang, Yuan Lu, Chen Yi, Bailing Li, Hongzhou Zhu, Hongmei Zhang, Xiaohui Lin, Ya Feng, Manli Zhu, Jingru Shen, Mianzeng Zhong, Bo Li, Xidong Duan. Centimeter-Scale PdS2 Ultrathin Films with High Mobility and Broadband Photoresponse. Small (Weinheim an der Bergstrasse, Germany). 2023 Apr;19(17):e2206915

    PMID: 36725313

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