题目：

Large-Scale Production of Bismuth Chalcogenide and Graphene Heterostructure and Its Application for Flexible Broadband Photodetector

作者：

Jingchao Song¹, Jian Yuan², Fang Xia³, Jingying Liu¹, Yupeng Zhang¹, Yu Lin Zhong¹, Jialu Zheng¹, Yan Liu², Shaojuan Li², Meng Zhao⁴, Zhiming Tian¹, Rachel A. Caruso⁵, Kian Ping Loh⁴, and Qiaoliang Bao*²

单位：

¹Department of Materials Science and Engineering Monash University Clayton, VIC 3800, Australia

²Institute of Functional Nano and Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou 215123, China

³School of Engineering and Information Technology Murdoch University Murdoch, WA 6150, Australia

⁴Graphene Research Centre and Department of Chemistry, National University of Singapore Singapore 117543, Singapore

⁵Particulate Fluids Processing Centre School of Chemistry, The University of Melbourne Melbourne, VIC 3010, Australia

摘要：

Large-scale production of 2D van der Waals heterostructures with precisely controlled chemical composition is the major challenge hindering their practical electric and optoelectronic applications. In this work, a solvothermal method is demonstrated to produce van der Waals heterostructures consisting of metal chalcogenides and graphene in a large scale. In situ powder X-ray diffraction reveals that graphene plays an important role as atomic template to grow bismuth chalcogenide nanoplatelets with preferential stoichiometry of Bi₂Se_1.5Te_1.5, which is naturally unstable. It is found that Bi₂Se_1.5Te_1.5 has the minimum lattice mismatch with graphene (<0.1%). The release of lattice mismatch strain between Bi₂Se_1.5Te_1.5 and graphene sheet is evidenced by a new peak in the ultraviolet photoelectron spectroscopy. A macroscale free-standing heterostructured thin film with excellent mechanical flexibility is fabricated by simply filtering the large-scale solution processed heterostructure. The heterostructure film is used to fabricate a flexible photodetector, which shows a broadband photo response and excellent durability in a bending test. The heterostructure material and device demonstrated in this work may shed light to flexible optoelectronic devices and applications.

影响因子：

新期刊

分区情况：

新期刊

链接：

http://onlinelibrary.wiley.com/doi/10.1002/aelm.201600077/abstract

(责任编辑：杨阳，联系方式：yangyangcnst@suda.edu.cn)