Highly crystalline ReSe2 atomic layers synthesized by chemical vapor transport
Lei Xing,
Xingxu Yan,
Jingying Zheng,
Guanchen Xu,
Zhixing Lu,
Lina Liu,
Jinghui Wang,
Peng Wang,
Xiaoqing Pan,
Liying Jiao
Affiliations
Lei Xing
Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry Tsinghua University Beijing China
Xingxu Yan
National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing China
Jingying Zheng
Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry Tsinghua University Beijing China
Guanchen Xu
Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry Tsinghua University Beijing China
Zhixing Lu
Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry Tsinghua University Beijing China
Lina Liu
Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry Tsinghua University Beijing China
Jinghui Wang
Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry Tsinghua University Beijing China
Peng Wang
National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing China
Xiaoqing Pan
Department of Materials Science and Engineering University of California Irvine California
Liying Jiao
Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Department of Chemistry Tsinghua University Beijing China
Abstract Two‐dimensional (2D) anisotropic rhenium diselenide (ReSe2) has attracted lots of attention due to its promising applications in electronics and optoelectronics. However, controlled synthesis of high quality ultrathin ReSe2 remains as a challenge. Here we developed an approach for synthesizing high quality 2D ReSe2 flakes with a thickness down to monolayer by chemical vapor transport (CVT) through carefully tuning the growth kinetics. The atomic structures and anisotropy of the obtained ReSe2 flakes were intensively characterized with scanning transmission electron microscope and angle‐resolved polarized Raman spectroscopy. Field‐effect transistors fabricated on the CVT‐grown ReSe2 flakes showed n‐type semiconducting behavior with an on/off current ratio of 105 and a mobility up to ∼5 cm2 V−1 s−1, which is comparable to mechanically exfoliated flakes and is obvious higher than the samples synthesized with other approaches. This study not only make high quality 2D ReSe2 easily accessible for both fundamental and application explorations but also sheds new lights on the chemical synthesis of other anisotropic 2D materials.
