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Kim, Jin Young
Next Generation Energy Laboratory
Research Interests
  • Polymer solar cells, QD solar cells, organic-inorganic hybrid solar cells, perovskite solar cells, OLEDs, PeLEDs, organic FETs

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Origin of the luminescence spectra width in perovskite nanocrystals with surface passivation

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Title
Origin of the luminescence spectra width in perovskite nanocrystals with surface passivation
Author
Yoon, Yung JinShin, Yun SeopPark, Chan BeomSon, Jung GeonKim, Jae WonKim, Hyeon SeoLee, WoojinHeo, JungwooKim, Gi-HwanKim, Jin Young
Issue Date
2020-11
Publisher
ROYAL SOC CHEMISTRY
Citation
NANOSCALE, v.12, no.42, pp.21695 - 21702
Abstract
Though halide perovskite nanocrystal (PeNC) based blue light emitting devices have been improved in the last few years, and the reasons for the improvements have been successfully explained, the origin of the narrow emission spectra of PeNCs have not been studied much. Here, the factors that affect the width of the emission spectra of PeNCs are analyzed with controlled synthesis and surface passivation treatment. The overall spectra are governed by the size of PeNCs; however, the width could be narrowed by surface passivation treatment. The anion passivation effect of the surface passivation improved most of optoelectronic properties, but had less effect on the emission spectra width. The narrower emission spectra of PeNCs are obtained by ligand passivation effect of the surface passivation. Light emitting devices with enhanced optoelectronic properties are successfully fabricated and narrow (0.094 eV, 16.72 nm) blue electroluminescence emission spectra (similar to 470 nm) are obtained.
URI
https://scholarworks.unist.ac.kr/handle/201301/48852
URL
https://pubs.rsc.org/en/content/articlelanding/2020/NR/D0NR04757K#!divAbstract
DOI
10.1039/d0nr04757k
ISSN
2040-3364
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