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Open AccessArticle

Ultrawide Color Gamut Perovskite and CdSe/ZnS Quantum-Dots-Based White Light-Emitting Diode with High Luminous Efficiency

1
Department of Photonics and Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
2
Department of Applied Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad-826004, India
3
Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361005, China
4
Department of Materials Science and Engineering, National Formosa University, Yunlin 63201, Taiwan
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Nanomaterials 2019, 9(9), 1314; https://doi.org/10.3390/nano9091314
Received: 22 August 2019 / Revised: 9 September 2019 / Accepted: 10 September 2019 / Published: 14 September 2019
(This article belongs to the Special Issue Quantum Dots and Micro-LED Display)
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 (CsPbBr1.2I1.8) 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. View Full-Text
Keywords: ultrawide color gamut display; perovskite quantum dots; white LED ultrawide color gamut display; perovskite quantum dots; white LED
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Lin, C.-H.; Kang, C.-Y.; Verma, A.; Wu, T.; Pai, Y.-M.; Chen, T.-Y.; Tsai, C.-L.; Yang, Y.-Z.; Sharma, S.; Sher, C.-W.; Chen, Z.; Lee, P.-T.; Chung, S.-R.; Kuo, H.-C. Ultrawide Color Gamut Perovskite and CdSe/ZnS Quantum-Dots-Based White Light-Emitting Diode with High Luminous Efficiency. Nanomaterials 2019, 9, 1314.

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