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Emission wavelength control of CsPb(Br1−xClx)3nanocrystals for blue light-emitting diode applications

Title
Emission wavelength control of CsPb(Br1−xClx)3nanocrystals for blue light-emitting diode applications
Author(s)
Cho, Seung-BumJung, Jin-WooKim, Yoon SeokCho, Chang-HeePark, Il-Kyu
DGIST Authors
Cho, Seung-BumJung, Jin-WooKim, Yoon SeokCho, Chang-HeePark, Il-Kyu
Issued Date
2021-04
Type
Article
Keywords
EfficiencyLightPerovskiteBlue emitting devicesBlue light emitting diodesEmission wavelengthFull-color displaysInorganic materialsLuminescence efficienciesPhotoluminescence emissionTrimethylsilyl chlorideLight emitting diodesChemical analysisChlorine compounds
ISSN
1466-8033
Abstract
All-inorganic materials, mixed halide perovskite (MHP) nanocrystals (NCs), have attracted considerable attention recently because of their excellent luminescence efficiencies and extraordinary physical properties, making them a promising material for next-generation lighting and full-color display. On the other hand, an essential development of blue-emitting devices rather than other color emitters has been hindered by their defect tolerance and quantum efficiency which are relatively lower than those of green-emitting NCs. Moreover, few studies have examined the synthesis and properties of blue-emitting MHP NCs or their applications to light-emitting diodes (LEDs). To solve these problems, this paper reports a facile and controllable way of producing emission wavelength tunable CsPb(Br1−xClx)3NCs using a fast and straightforward chemical treatment with the trimethylsilyl chloride (TMSC) additive. Structural and chemical analysis showed that the Cl content in the CsPb(Br1−xClx)3NCs could be modulated by TMSC addition without changing the morphologies. The photoluminescence emission peak wavelength of the CsPb(Br1−xClx)3NCs could be modulated from 515 to 416 nm by increasing the TMSC content. To this end, blue and green LEDs were successfully demonstrated by using the TMSC-treated CsPb(Br1−xClx)3NCs as an emissive layer, showing a controllable emission wavelength from 473 to 511 nm. © The Royal Society of Chemistry 2021.
URI
http://hdl.handle.net/20.500.11750/15429
DOI
10.1039/d1ce00132a
Publisher
Royal Society of Chemistry
Related Researcher
  • 조창희 Cho, Chang-Hee 화학물리학과
  • Research Interests Semiconductor; Nanophotonics; Light-Matter Interaction
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Appears in Collections:
Department of Physics and Chemistry Future Semiconductor Nanophotonics Laboratory 1. Journal Articles

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