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Yuan, H., Massuyeau, F., Gautier, N., Kama, A. B., Faulques, E., Chen, F., Shen, Q., Zhang, L., Paris, M. & Gautier, R. (2020) Doped Lead Halide White Phosphors for Very High Efficiency and Ultra-High Color Rendering. Angewandte Chemie International Edition, 59 2802–2807.
Added by: Richard Baschera (2020-04-24 10:26:41) Last edited by: Richard Baschera (2020-04-24 10:46:48) |
| Type de référence: Article DOI: 10.1002/anie.201910180 Numéro d'identification (ISBN etc.): 1521-3773 Clé BibTeX: Yuan2020 Voir tous les détails bibliographiques  |
Catégories: IMN, INTERNATIONAL, MIOPS Mots-clés: hybrid lead halides, photoluminescence, quantum yield, single-phase phosphor, ultra-high color rendering Créateurs: Chen, Faulques, Gautier, Gautier, Kama, Massuyeau, Paris, Shen, Yuan, Zhang Collection: Angewandte Chemie International Edition |
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| Liens URLs http://onlinelibra ... 002/anie.201910180 |
| Résumé |
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Near-UV-pumped white-light-emitting diodes with ultra-high color rendering and decreased blue-light emission is highly desirable. However, discovering a single-phase white light emitter with such characteristics remains challenging. Herein, we demonstrate that Mn doping as low as 0.027 % in the hybrid post-perovskite type (TDMP)PbBr4 (TDMP=trans-2,5-dimethylpiperaziniium) enables to achieve a bright pure white emission replicating the spectrum of the sun's rays. Thus, a white phosphor exhibiting an emission with CIE coordinates (0.330, 0.365), a high photoluminescence quantum yield of 60 % (new record for white light emission of hybrid lead halides), and an ultra-high color rendering index (CRI=96, R9=91.8), corresponding to the record value for a single phase emitter was obtained. The investigation of the photoluminescence properties revealed how free excitons, self-trapped excitons, and low amount of Mn dopants are coupled to give rise to such pure white emission.
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