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

doi:10.3390/nano9091314

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

Nanomaterials (Basel). 2019 Sep 14;9(9):1314. doi: 10.3390/nano9091314.

Authors

Chih-Hao Lin¹, Chieh-Yu Kang¹, Akta Verma², Tingzhu Wu³, Yung-Min Pai¹, Tzu-Yu Chen¹, Chun-Lin Tsai¹, Ya-Zhu Yang⁴, S K Sharma², Chin-Wei Sher¹, Zhong Chen⁵, Po-Tseng Lee¹, Shu-Ru Chung⁶, Hao-Chung Kuo⁷

Affiliations

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. wutingzhu@xmu.edu.cn.
⁴ Department of Materials Science and Engineering, National Formosa University, Yunlin 63201, Taiwan.
⁵ Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361005, China.
⁶ Department of Materials Science and Engineering, National Formosa University, Yunlin 63201, Taiwan. srchung@nfu.edu.tw.
⁷ Department of Photonics and Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan. hckuo@faculty.nctu.edu.tw.

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 (CsPbBr_1.2I_1.8) 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.

Keywords: perovskite quantum dots; ultrawide color gamut display; white LED.

Abstract

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