Journal
APPLIED PHYSICS LETTERS
Volume 120, Issue 8, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0085902
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Funding
- National Natural Science Foundation of China [62004075, 62050039, 5171101030, 51761145048, 62005089, 61725401]
- China Postdoctoral Science Foundation [2021T140229, 2020M682413, 2019M662624, 2020M682398]
- Fund for Innovative Research Groups of the Natural Science Foundation of Hubei Province [2020CFA034]
- Post-Doctoral Innovative Talent Support Program [BX20200142]
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Reduced-dimensional perovskites with self-assembled multi-quantum well structures are promising for LEDs due to their high color purity, high photoluminescence quantum yield, and decent stability. Thermal evaporation is an appealing option for RDP film fabrication with uniform crystallization, high repeatability, and precise control.
Reduced-dimensional perovskites (RDPs) with self-assembled multi-quantum well structures have emerged as promising candidates for light-emitting diodes (LEDs) due to their high color purity, high photoluminescence quantum yield, and decent stability. Compared to the traditional RDP film preparation methods reported in the previous literature, thermal evaporation is an appealing option for RDP film fabrication with uniform crystallization, high repeatability, and precise control. Here, based on the vacuum deposition method, we adopted a combined strategy, including annealing treatment and device structure optimization. Meanwhile, we investigated the effects of post-annealing on charge carrier recombination kinetics, exciton energy transfer, and phase distribution of vacuum-deposited RDP films. As a result, we achieved an external quantum efficiency of 6.5% for the device, which is one of the best performances among prevailing research on vacuum-processed RDP-based LEDs.
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