Photonics Research, 2020, 8 (3): 03000368, Published Online: Feb. 26, 2020   

Ultraviolet-to-microwave room-temperature photodetectors based on three-dimensional graphene foams Download: 677次

Author Affiliations
1 Key Laboratory of Optoelectronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China
2 Department of Applied Physics and Materials, Research Centre, The Hong Kong Polytechnic University, Hong Kong, China
3 National Institute for Advanced Materials, Tianjin Key Laboratory of Metal and Molecule Based Material Chemistry, Key Laboratory of Functional Polymer Materials, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Materials Science and Engineering, Nankai University, Tianjin 300071, China
4 e-mail: shengquan@tju.edu.cn
5 e-mail: apafyan@polyu.edu.hk
6 e-mail: jqyao@tju.edu.cn
Abstract
Highly sensitive broadband photodetection is of critical importance for many applications. However, it is a great challenge to realize broadband photodetection by using a single device. Here we report photodetectors (PDs) based on three-dimensional (3D) graphene foam (GF) photodiodes with asymmetric electrodes, which show an ultra-broadband photoresponse from ultraviolet to microwave for wavelengths ranging from 102 to 106 nm. Moreover, the devices exhibit a high photoresponsivity of 103 A ·W?1, short response time of 43 ms, and 3 dB bandwidth of 80 Hz. The high performance of the devices can be attributed to the photothermoelectric (PTE, also known as the Seebeck) effect in 3D GF photodiodes. The excellent optical, thermal, and electrical properties of 3D GFs offer a superior basis for the fabrication of PTE-based PDs. This work paves the way to realize ultra-broadband and high-sensitivity PDs operated at room temperature.

Yifan Li, Yating Zhang, Yu Yu, Zhiliang Chen, Qingyan Li, Tengteng Li, Jie Li, Hongliang Zhao, Quan Sheng, Feng Yan, Zhen Ge, Yuxin Ren, Yongsheng Chen, Jianquan Yao. Ultraviolet-to-microwave room-temperature photodetectors based on three-dimensional graphene foams[J]. Photonics Research, 2020, 8(3): 03000368.

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