Germanium/perovskite heterostructure for high-performance and broadband photodetector from visible to infrared telecommunication band

Wei Hu; Hui Cong; Wei Huang; Yu Huang; Lijuan Chen; Anlian Pan; Chunlai Xue

doi:10.1038/s41377-019-0218-y

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Germanium/perovskite heterostructure for high-performance and broadband photodetector from visible to infrared telecommunication band

Article

- Germanium/perovskite heterostructure for high-performance and broadband photodetector from visible to infrared telecommunication band
- Light: Science & Applications Vol. 8, Issue 6, Pages: 1063-1072(2019)
- Affiliations：
  
  1.Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, School of Physics and Electronics, Hunan University, Changsha, Hunan 410082, China
  2.State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China
  3.Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  4.Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, College of Materials Science and Engineering, Hunan University, Changsha, Hunan 410082, China
- Author bio：
  
  Chunlai Xue (clxue@semi.ac.cn)
- Funds：
- DOI：10.1038/s41377-019-0218-y
  CLC：
- Published：2019，
  
  Published Online：21 November 2019，
  
  Received：26 June 2019，
  
  Revised：17 October 2019，
  
  Accepted：04 November 2019
- Accepted：
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Hu, W. et al. Germanium/perovskite heterostructure for high-performance and broadband photodetector from visible to infrared telecommunication band. Light: Science & Applications, 8, 1063-1072 (2019).
DOI：

Hu, W. et al. Germanium/perovskite heterostructure for high-performance and broadband photodetector from visible to infrared telecommunication band. Light: Science & Applications, 8, 1063-1072 (2019). DOI： 10.1038/s41377-019-0218-y.

摘要

Abstract

A high-performance and broadband heterojunction photodetector has been successfully fabricated. The heterostructure device is based on a uniform and pinhole-free perovskite film constructed on top of a single-crystal germanium layer. The perovskite/germanium photodetector shows enhanced performance and a broad spectrum compared with the sin

gle-material-based device. The photon response properties are characterized in detail from the visible to near-infrared spectrum. At an optical fibre communication wavelength of 1550 nm

the heterojunction device exhibits the highest responsivity of 1.4 A/W. The performance is promoted because of an antireflection perovskite coating

the thickness of which is optimized to 150 nm at the telecommunication band. At a visible light wavelength of 680 nm

the device shows outstanding responsivity and detectivity of 228 A/W and 1.6 × 10

Jones

respectively. These excellent properties arise from the photoconductive gain boost in the heterostructure device. The presented heterojunction photodetector provides a competitive approach for wide-spectrum photodetection from visible to optical communication areas. Based on the distinguished capacity of light detection and harvesting from the visible to near-infrared spectrum

the designed germanium/perovskite heterostructure configuration is believed to provide new building blocks for novel optoelectronic devices.

关键词

Keywords

references

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