CsPbBr3 and Cs4PbBr6 perovskite light-emitting diodes using a thermally evaporated host–dopant system

This article shows the results of fabricating a device through vacuum deposition by synthesizing a perovskite thin film in the powder form. Light emitting diodes (LEDs) were fabricated using a single-source and host–dopant system of the perovskite produced in the powder form. Both CsPbBr3 and Cs4PbB...

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Bibliographic Details
Published in:Nanoscale 2023-06, Vol.15 (21), p.9533-9542
Main Authors: Bae, Sa-Rang, Seol, Myeong Jin, Kim, Soo Young
Format: Article
Language:English
Subjects:
Aluminum
Dopants
Efficiency
Light emitting diodes
Luminance
Optical properties
Perovskites
Photoluminescence
Quantum efficiency
Thin films
Vacuum deposition
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Summary:This article shows the results of fabricating a device through vacuum deposition by synthesizing a perovskite thin film in the powder form. Light emitting diodes (LEDs) were fabricated using a single-source and host–dopant system of the perovskite produced in the powder form. Both CsPbBr3 and Cs4PbBr6 used in the host–dopant system were green, and the host was tris(8-quinolinolato) aluminum(iii). It is confirmed that the display efficiency and optical characteristics are significantly improved by the dopant ratio. The 3%-doped CsPbBr3 based LED shows a luminance of 9083 cd m−2, 3.36% external quantum efficiency (EQE), and 96% photoluminescence quantum yield (PLQY) efficiency (for the undoped CsPbBr3 LED, luminance: 844 cd m−2/EQE: 1.93%/PLQY: 85%). The LED based on 5%-doped Cs4PbBr6 shows a luminance of 11 440 cd m−2, an EQE of 6.27%, and 99% PLQY efficiency (for the undoped Cs4PbBr6 LED, luminance:1113 cd m−2/EQE: 1.64%/PLQY: 93%). It is expected that the results of this research will contribute to the perovskite LED research performed by thermal evaporation in the future.
ISSN:2040-3364
2040-3372
DOI:10.1039/d3nr01190a