中国物理B ›› 2018, Vol. 27 ›› Issue (9): 97104-097104.doi: 10.1088/1674-1056/27/9/097104

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Visualizing light-to-electricity conversion process in InGaN/GaN multi-quantum wells with a p-n junction

Yangfeng Li(李阳锋), Yang Jiang(江洋), Junhui Die(迭俊珲), Caiwei Wang(王彩玮), Shen Yan(严珅), Haiyan Wu(吴海燕), Ziguang Ma(马紫光), Lu Wang(王禄), Haiqiang Jia(贾海强), Wenxin Wang(王文新), Hong Chen(陈弘)   

  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 Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2018-05-25 修回日期:2018-06-18 出版日期:2018-09-05 发布日期:2018-09-05
  • 通讯作者: Hong Chen E-mail:hchen@iphy.ac.cn
  • 基金资助:

    Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFB0400302 and 2016YFB0400603), the National Natural Science Foundation of China (Grant Nos. 11574362, 61210014, and 11374340), and the Innovative Clean-Energy Research and Application Program of Beijing Municipal Science and Technology Commission, China (Grant No. Z151100003515001).

Visualizing light-to-electricity conversion process in InGaN/GaN multi-quantum wells with a p-n junction

Yangfeng Li(李阳锋)1,2, Yang Jiang(江洋)1,2, Junhui Die(迭俊珲)1,2, Caiwei Wang(王彩玮)1,2, Shen Yan(严珅)1,2, Haiyan Wu(吴海燕)1,2, Ziguang Ma(马紫光)1,2, Lu Wang(王禄)1,2, Haiqiang Jia(贾海强)1,2, Wenxin Wang(王文新)1,2, Hong Chen(陈弘)1,2   

  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 Chinese Academy of Sciences, Beijing 100049, China
  • Received:2018-05-25 Revised:2018-06-18 Online:2018-09-05 Published:2018-09-05
  • Contact: Hong Chen E-mail:hchen@iphy.ac.cn
  • Supported by:

    Project supported by the National Key Research and Development Program of China (Grant Nos. 2016YFB0400302 and 2016YFB0400603), the National Natural Science Foundation of China (Grant Nos. 11574362, 61210014, and 11374340), and the Innovative Clean-Energy Research and Application Program of Beijing Municipal Science and Technology Commission, China (Grant No. Z151100003515001).

摘要:

Absorption and carrier transport behavior plays an important role in the light-to-electricity conversion process, which is difficult to characterize. Here we develop a method to visualize such a conversion process in the InGaN/GaN multi-quantum wells embedded in a p-n junction. Under non-resonant absorption conditions, a photocurrent was generated and the photoluminescence intensity decayed by more than 70% when the p-n junction out-circuit was switched from open to short. However, when the excitation photon energy decreased to the resonant absorption edge, the photocurrent dropped drastically and the photoluminescence under open and short circuit conditions showed similar intensity. These results indicate that the escaping of the photo-generated carriers from the quantum wells is closely related to the excitation photon energy.

关键词: multiple quantum wells, p-n junction, light-to-electricity, photocurrent

Abstract:

Absorption and carrier transport behavior plays an important role in the light-to-electricity conversion process, which is difficult to characterize. Here we develop a method to visualize such a conversion process in the InGaN/GaN multi-quantum wells embedded in a p-n junction. Under non-resonant absorption conditions, a photocurrent was generated and the photoluminescence intensity decayed by more than 70% when the p-n junction out-circuit was switched from open to short. However, when the excitation photon energy decreased to the resonant absorption edge, the photocurrent dropped drastically and the photoluminescence under open and short circuit conditions showed similar intensity. These results indicate that the escaping of the photo-generated carriers from the quantum wells is closely related to the excitation photon energy.

Key words: multiple quantum wells, p-n junction, light-to-electricity, photocurrent

中图分类号:  (III-V semiconductors)

  • 71.55.Eq
72.40.+w (Photoconduction and photovoltaic effects) 73.21.Fg (Quantum wells) 73.63.Hs (Quantum wells)