Fabrication of MAPbBr3 Single Crystal p-n Photodiode and n-p-n Phototriode for Sensitive Light Detection Application

Feng Xia Liang, Jing Jing Jiang, Yao Zu Zhao, Zhi Xiang Zhang, Di Wu, Long Hui Zeng, Yuen Hong Tsang, Lin Bao Luo

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)


In this study, MAPbBr3 single crystal (MSC) p-n perovskite homojunction photodiode and n-p-n phototriode are successfully fabricated through controlled incorporation of Bi3+ ions in solution. Optoelectronic analysis reveals that the photodiode shows typical photovoltaic behavior and the best photovoltaic performance can be achieved when the n-type MSC is grown in 0.3% Bi3+ feed solution. The as-assembled p-n MSC photovoltaic detector displays obvious sensitivity to 520 nm illumination, with a high responsivity of up to 0.62 A W-1 and a specific detectivity of 2.16 × 1012 Jones, which surpass many those of MSC photodetectors previously reported. Further performance optimization can be realized by constructing an n-p-n phototriode using the same growth method. The photocurrent magnification rate of the as-fabricated n-p-n phototriode can reach a maximum value of 2.9 × 103. Meanwhile, a higher responsivity of 14.47 A W-1, specific detectivity of 4.67 × 1013 Jones, and an external quantum efficiency of up to 3.46 × 103 are achieved under an emitter–collector bias of 8 V. These results confirm that the present p-n and n-p-n MSC homojunctions are promising device configurations, which may find potential application in future optoelectronic devices and systems.

Original languageEnglish
Article number2001033
JournalAdvanced Functional Materials
Issue number32
Early online date25 Jun 2020
Publication statusPublished - 1 Aug 2020


  • optoelectronic devices
  • perovskite homojunctions
  • photodiodes, phototriodes
  • single crystals

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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