Abstract
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 language | English |
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Article number | 2001033 |
Journal | Advanced Functional Materials |
Volume | 30 |
Issue number | 32 |
Early online date | 25 Jun 2020 |
DOIs | |
Publication status | Published - 1 Aug 2020 |
Keywords
- optoelectronic devices
- perovskite homojunctions
- photodiodes, phototriodes
- single crystals
ASJC Scopus subject areas
- General Chemistry
- General Materials Science
- Condensed Matter Physics