期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 23, 期 40, 页码 23024-23031出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cp03536c
关键词
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资金
- National Key Research & Development Program of China [2016YFA0201902]
- National Natural Science Foundation of China [62022081, 61974099, 91733302, 61605073, 61935017]
- Guangdong- Hong Kong-Macau Joint Laboratory [2019B121205001]
- Shenzhen Nanshan District Pilotage Team Program [LHTD20170006]
- Macau Science and Technology Development Fund (FDCT) [0098/2020/A2, 0019/2019/AGJ, FDCT-091/2017/A2, FDCT-014/2017/AMJ]
- University of Macau [MYRG2019-00055-IAPME]
- Natural Science Foundation of Guangdong Province [2021A1515010694]
Photodetectors based on the graphene-Mo2C heterostructure exhibit high responsivity over a broad wavelength range from visible to infrared, due to enhanced light absorption and minimal resistance for photoexcited carriers in both materials.
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 Mo2C). The graphene-Mo2C 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 Mo2C. Consequently, photodetectors based on the graphene-Mo2C heterostructure deliver a very high responsivity from visible to infrared telecommunication wavelengths.
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