A graphene–Mo2C heterostructure for a highly responsive broadband photodetector. Issue 40 (6th October 2021)

• Record Type: Journal Article
• Authors: Bao, Xiaozhi; Sun, Tian; Liu, Yan; Xu, Chuan; Ma, Weiliang; Guo, Junpo; Zheng, Yun; Nanjunda, Shivananju Bannur; Liu, Huating; Huang, Zongyu; Li, Shaojuan; Lin, Shenghuang; Xing, Guichuan; Ren, Wencai; Bao, Qiaoliang; Shao, Huaiyu
• Is Part Of: Physical chemistry chemical physics. Volume 23:Issue 40(2021)
• Page Start: 23024
• Page End: 23031
• Publication Date: 2021-10-06
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/d1cp03536c
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : A photodetector based on a graphene–Mo2 C heterostructure delivers very high responsivities from visible to infrared telecommunication wavelengths. Abstract : Photodetectors based on intrinsic graphene can operate over a broad wavelength range with ultrafast response, but their responsivity is much lower than commercial silicon photodiodes. The combination of graphene with two-dimensional (2D) semiconductors may enhance the light absorption, but there is still a cutoff wavelength originating from the bandgap of semiconductors. Here, we report a highly responsive broadband photodetector based on the heterostructure of graphene and transition metal carbides (TMCs, more specifically Mo2 C). The graphene–Mo2 C heterostructure enhanced light absorption over a broad wavelength range from ultraviolet to infrared. In addition, there is very small resistance for photoexcited carriers in both graphene and Mo2 C. Consequently, photodetectors based on the graphene–Mo2 C heterostructure deliver a very high responsivity from visible to infrared telecommunication wavelengths.