Ultrawide color gamut perovskite and cdse/zns quantum-dots-based white light-emitting diode with high luminous efficiency

Chih Hao Lin, Chieh Yu Kang, Akta Verma, Tingzhu Wu*, Yung Min Pai, Tzu Yu Chen, Chun Lin Tsai, Ya Zhu Yang, S. K. Sharma, Chin Wei Sher, Zhong Chen, Po Tseng Lee, Shu Ru Chung, Hao Chung Kuo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We demonstrate excellent color quality of liquid-type white light-emitting diodes (WLEDs) using a combination of green light-emitting CsPbBr3 and red light-emitting CdSe/ZnS quantum dots (QDs). Previously, we reported red (CsPbBr1.2 I1.8 ) and green (CsPbBr3 ) perovskite QDs (PQDs)-based WLEDs with high color gamut, which manifested fast anion exchange and stability issues. Herein, the replacement of red PQDs with CdSe/ZnS QDs has resolved the aforementioned problems effectively and improved both stability and efficiency. Further, the proposed liquid-type device possesses outstanding color gamut performance (132% of National Television System Committee and 99% of Rec. 2020). It also shows a high efficiency of 66 lm/W and an excellent long-term operation stability for over 1000 h.

Original languageEnglish
Article number1314
JournalNanomaterials
Volume9
Issue number9
DOIs
StatePublished - Sep 2019

Keywords

  • Perovskite quantum dots
  • Ultrawide color gamut display
  • White LED

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