Centimeter‐Scale PdS2 Ultrathin Films with High Mobility and Broadband Photoresponse

Author:

He Kun1,Xu Weiting1,Tang Jingmei2,Lu Yuan3,Yi Chen1,Li Bailing2,Zhu Hongzhou1,Zhang Hongmei2,Lin Xiaohui2,Feng Ya1,Zhu Manli1,Shen Jingru1,Zhong Mianzeng4,Li Bo156ORCID,Duan Xidong2

Affiliation:

1. Hunan Provincial Key Laboratory of Two‐Dimensional Materials Advanced Semiconductor Technology and Application Engineering Research Center of Ministry of Education of China School of Physics and Electronics Changsha Semiconductor Technology and Application Innovation Research Institute College of Semiconductors (College of Integrated Circuits) Hunan University Changsha 410082 China

2. State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China

3. School of Materials Science and Energy Engineering Foshan University Foshan 528000 China

4. School of Physics and Electronics Central South University Changsha 410083 China

5. Research Institute of Hunan University in Chongqing Chongqing 401120 China

6. Shenzhen Research Institute of Hunan University Shenzhen 518063 China

Abstract

Abstract2D 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.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Chongqing

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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