Ultraviolet-to-microwave room-temperature photodetectors based on three-dimensional graphene foams

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

Research output: Journal article publicationJournal articleAcademic researchpeer-review

9 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)368-374
Number of pages7
JournalPhotonics Research
Volume8
Issue number3
DOIs
Publication statusPublished - 1 Mar 2020

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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