Issue 6, 2023

Unveiling the degraded electron durability in reduced-dimensional perovskites

Abstract

The operational stability of reduced-dimensional metal halide perovskites (RD-MHPs) lags far behind the practical requirements for future high-definition displays. Thereinto, the electron durability of RD-MHPs plays a critical role in stable LEDs during continuous operation, however, it still lacks adequate research and a deep understanding. Herein, the electron durability and deterioration mechanism of phenethylammonium (PEA+)-modified RD-MHPs are systematically conducted through an in situ photoelectron spectroscopy technique by implementing tunable electron-beam radiation to simulate device operation. The formation of detrimental metallic lead (Pb0) caused by the reduction of lead ions (Pb2+) is observed along with the decomposition of PEA+ under electron-beam radiation, thereby changing the photophysical properties of PEA+-doped RD-MHPs. These results provide deep insight into the process of how injected electrons affect the performance of PEA+-doped perovskite LEDs, which may also provide potential guidance for designing robust and effective organic spacers for RD-MHPs.

Graphical abstract: Unveiling the degraded electron durability in reduced-dimensional perovskites

Supplementary files

Article information

Article type
Paper
Submitted
28 Pun 2022
Accepted
08 Phe 2023
First published
09 Phe 2023

Nanoscale, 2023,15, 2798-2805

Unveiling the degraded electron durability in reduced-dimensional perovskites

Y. Lu, Y. Shen, Y. Li, K. Shen, W. Zhou and J. Tang, Nanoscale, 2023, 15, 2798 DOI: 10.1039/D2NR06635A

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