Ultrawide Color Gamut Perovskite and CdSe/ZnS Quantum-Dots-Based White Light-Emitting Diode with High Luminous Efficiency
oleh: 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
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2019-09-01 |
Deskripsi
We demonstrate excellent color quality of liquid-type white light-emitting diodes (WLEDs) using a combination of green light-emitting CsPbBr<sub>3</sub> and red light-emitting CdSe/ZnS quantum dots (QDs). Previously, we reported red (CsPbBr<sub>1.2</sub>I<sub>1.8</sub>) and green (CsPbBr<sub>3</sub>) 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.