Enhanced photoluminescence quantum efficiency and stability of water assisted CsPbBr3 perovskite nanocrystals

[Display omitted] Perovskite nanocrystals (NCs) are promising emissive materials for application in light-emitting diodes (LEDs) due to their high quantum efficiency and narrow full width at half maximum (FWHM). However, the ion bonding character of perovskite leads to their quick chemical decomposi...

Full description

Saved in:
Bibliographic Details
Published inJournal of industrial and engineering chemistry (Seoul, Korea) Vol. 88; pp. 84 - 89
Main Authors Kim, Minji, Kim, Jae Ho, Kim, Maengsuk, Kim, Chang Su, Choi, Jin Woo, Choi, Keunsu, Lee, Jun Hee, Park, Juyun, Kang, Young-Cheol, Jin, Sung-Ho, Song, Myungkwan
Format Journal Article
LanguageEnglish
Published Elsevier B.V 25.08.2020
한국공업화학회
Subjects
CsPbBr3
Nanocrystals
Perovskite
Quantum dots
Water-assisted
화학공학
Perovskite
CsPbBr3
Nanocrystals
Quantum dots
Water-assisted
Online AccessGet full text

Cover

More Information
Summary:[Display omitted] Perovskite nanocrystals (NCs) are promising emissive materials for application in light-emitting diodes (LEDs) due to their high quantum efficiency and narrow full width at half maximum (FWHM). However, the ion bonding character of perovskite leads to their quick chemical decomposition under atmospheric moisture. Herein, we present CsPbBr3 perovskite NCs that achieved improved efficiency and stability with the addition of water during the synthesis process. The CsPbBr3 NCs synthesized with a controlled amount of water exhibited a quantum yield greater than 90%, sustained stability over 35 days and a much narrower FWHM than CsPbBr3 NCs that did not use water. Finally, water-added perovskite NC LEDs were fabricated and they showed a nearly 5-times improvement in current efficiency compared to the reference device.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2020.04.027