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Title: Dynamic Impact of Electrode Materials on Interface of Single-Crystalline Methylammonium Lead Bromide Perovskite

Journal Article · · Advanced Materials Interfaces

One of the current challenges in methylammonium lead halide (MAPbX3) perovskite application research is understanding contact formation and interfacial phenomena for highly efficient and stable device performance. For semiconductors, development of contact formation is inseparable from device performance and stability. Single–crystalline MAPbX3 has become of great interest for perovskite devices in photodetectors, light–emitting diodes, and more recently in high–energy radiation detection. Deeper research is required to understand interfacial interactions in single–crystalline MAPbX3. This article focuses on the dynamic impact of electrode metal (Au and Cr) on methylammonium lead bromide (MAPbBr3) single crystals. It is studied how charge transport properties of single crystal MAPbBr3 can be tuned via electrode material selection at the metal/MAPbBr3 interface to improve device performance with proper contact formation. The ability to create an ohmic–like or nonohmic contact by switching the electrode metal from Cr to Au, respectively, is demonstrated. It is observed that the interfacial charge transfer resistance (recombination resistance) of the Cr/MAPbBr3 interface is 1.79 × 109 Ω, compared to 1.32 × 107 Ω for the Au/MAPbBr3. Cr contacts can reduce hysteretic behavior by reducing interfacial recombination and interfacial polarization. Furthermore, these studies provide insight to metal/MAPbX3 interfacial interactions toward device engineering for hole transport layer–free MAPbX3 device structures.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1456783
Journal Information:
Advanced Materials Interfaces, Vol. 5, Issue 18; ISSN 2196-7350
Publisher:
Wiley-VCHCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

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Cited By (3)

A Review of Perovskites Solar Cell Stability journal February 2019
Understanding the Impact of Bismuth Heterovalent Doping on the Structural and Photophysical Properties of CH 3 NH 3 PbBr 3 Halide Perovskite Crystals with Near‐IR Photoluminescence journal March 2019
Operational stability of perovskite light emitting diodes journal January 2020

Figures / Tables (6)