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

We demonstrate excellent color quality of liquid-type white light-emitting diodes (WLEDs) using a combination of green light-emitting CsPbBr(3) and red light-emitting CdSe/ZnS quantum dots (QDs). Previously, we reported red (CsPbBr(1.2)I(1.8)) and green (CsPbBr(3)) perovskite QDs (PQDs)-based WLEDs...

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Detalles Bibliográficos
Autores principales: Lin, Chih-Hao, Kang, Chieh-Yu, Verma, Akta, Wu, Tingzhu, Pai, Yung-Min, Chen, Tzu-Yu, Tsai, Chun-Lin, Yang, Ya-Zhu, Sharma, S.K., Sher, Chin-Wei, Chen, Zhong, Lee, Po-Tseng, Chung, Shu-Ru, Kuo, Hao-Chung
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6781062/
https://www.ncbi.nlm.nih.gov/pubmed/31540013
http://dx.doi.org/10.3390/nano9091314
Descripción
Sumario:We demonstrate excellent color quality of liquid-type white light-emitting diodes (WLEDs) using a combination of green light-emitting CsPbBr(3) and red light-emitting CdSe/ZnS quantum dots (QDs). Previously, we reported red (CsPbBr(1.2)I(1.8)) and green (CsPbBr(3)) 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.

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