中国物理B ›› 2021, Vol. 30 ›› Issue (9): 97803-097803.doi: 10.1088/1674-1056/abf10c

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Enhanced absorption process in the thin active region of GaAs based p-i-n structure

Chen Yue(岳琛)1,2,3, Xian-Sheng Tang(唐先胜)1,2,3, Yang-Feng Li(李阳锋)1, Wen-Qi Wang(王文奇)1, Xin-Xin Li(李欣欣)1,2,3, Jun-Yang Zhang(张珺玚)1,2,3, Zhen Deng(邓震)1, Chun-Hua Du(杜春花)1, Hai-Qiang Jia(贾海强)1,3,4, Wen-Xin Wang(王文新)1,3,4, Wei Lu(陆卫)5, Yang Jiang(江洋)1,†, and Hong Chen(陈弘)1,3,4,‡   

  1. 1 Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Academy of Sciences, Beijing 100049, China;
    3 Center of Material and Optoelectronics Engineering, University of Academy of Sciences, Beijing 100049, China;
    4 Songshan Lake Material Laboratory, Dongguan 523808, China;
    5 State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
  • 收稿日期:2020-12-10 修回日期:2021-03-19 接受日期:2021-03-23 出版日期:2021-08-19 发布日期:2021-08-19
  • 通讯作者: Yang Jiang, Hong Chen E-mail:jiangyang@iphy.ac.cn;hchen@iphy.ac.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61991441) and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB33000000).

Enhanced absorption process in the thin active region of GaAs based p-i-n structure

Chen Yue(岳琛)1,2,3, Xian-Sheng Tang(唐先胜)1,2,3, Yang-Feng Li(李阳锋)1, Wen-Qi Wang(王文奇)1, Xin-Xin Li(李欣欣)1,2,3, Jun-Yang Zhang(张珺玚)1,2,3, Zhen Deng(邓震)1, Chun-Hua Du(杜春花)1, Hai-Qiang Jia(贾海强)1,3,4, Wen-Xin Wang(王文新)1,3,4, Wei Lu(陆卫)5, Yang Jiang(江洋)1,†, and Hong Chen(陈弘)1,3,4,‡   

  1. 1 Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Academy of Sciences, Beijing 100049, China;
    3 Center of Material and Optoelectronics Engineering, University of Academy of Sciences, Beijing 100049, China;
    4 Songshan Lake Material Laboratory, Dongguan 523808, China;
    5 State Key Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
  • Received:2020-12-10 Revised:2021-03-19 Accepted:2021-03-23 Online:2021-08-19 Published:2021-08-19
  • Contact: Yang Jiang, Hong Chen E-mail:jiangyang@iphy.ac.cn;hchen@iphy.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61991441) and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB33000000).

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摘要： The optical absorption is the most important macroscopic process to characterize the microscopic optical transition in the semiconductor materials. Recently, great enhancement has been observed in the absorption of the active region within a p-n junction. In this paper, GaAs based p-i-n samples with the active region varied from 100 nm to 3 μ were fabricated and it was observed that the external quantum efficiencies are higher than the typical results, indicating a new mechanism beyond the established theories. We proposed a theoretical model about the abnormal optical absorption process in the active region within a strong electric field, which might provide new theories for the design of the solar cells, photodetectors, and other photoelectric devices.

关键词: photoelectric, p-n junction, absorption coefficient

Abstract: The optical absorption is the most important macroscopic process to characterize the microscopic optical transition in the semiconductor materials. Recently, great enhancement has been observed in the absorption of the active region within a p-n junction. In this paper, GaAs based p-i-n samples with the active region varied from 100 nm to 3 μ were fabricated and it was observed that the external quantum efficiencies are higher than the typical results, indicating a new mechanism beyond the established theories. We proposed a theoretical model about the abnormal optical absorption process in the active region within a strong electric field, which might provide new theories for the design of the solar cells, photodetectors, and other photoelectric devices.

Key words: photoelectric, p-n junction, absorption coefficient

中图分类号:  (III-V semiconductors)

  • 78.55.Cr
78.40.Fy (Semiconductors) 78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)) 72.20.Jv (Charge carriers: generation, recombination, lifetime, and trapping)