Related Experiment Video
Updated: Apr 13, 2026
11:38
Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
Published on: February 27, 2017
19.0K
Strategies for Enhancing the Stability of High-Electric-Field Perovskite Single-Crystal Radiation Detectors
Wenqing Zhang1,2,3, Hu Wang1,2,3, Jie Fu1,4
1Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
ACS Energy Letters
|January 15, 2026
Summary
High electric fields in MAPbBr3 detectors cause corrosion, but titanium ion migration is limited to grain boundaries. Device stability can be restored by surface treatment and encapsulation is crucial.
Area of Science:
- Materials Science
- Solid-State Physics
- Detector Technology
Background:
- High electric fields improve sensitivity and speed in MAPbBr3 detectors.
- However, high fields also cause interfacial corrosion and ion migration, reducing device stability.
Purpose of the Study:
- To investigate the mechanism of interfacial electrochemical corrosion and ion migration in MAPbBr3 single-crystal radiation detectors under high electric fields.
- To identify strategies for restoring and enhancing device stability.
Main Methods:
- Utilized high electric fields to study MAPbBr3 single-crystal detectors.
- Analyzed ion migration pathways and interfacial reactions.
- Investigated surface treatment and encapsulation techniques.
Main Results:
- Multivalent titanium ion (Ti4+) migration requires grain boundary (GBs) assistance and is confined to polycrystalline regions, far from the crystal surface.
- Device performance was fully restored by removing the corroded surface and redepositing the electrode.
- Humidity and oxygen accelerate interfacial electrochemical reactions.
Conclusions:
- Titanium ion migration in MAPbBr3 detectors is GB-assisted and surface-confined.
- Surface treatment and electrode redeposition can restore detector performance.
- Encapsulation is essential to protect perovskite single-crystal devices from environmental factors.
