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Zhao, M., Xia, Z., Huang, X., Ning, L., Gautier, R., Molokeev, M. S., Zhou, Y., Chuang, Y.-C., Zhang, Q., Liu, Q. & Poeppelmeier, K. R. (2019) Li substituent tuning of LED phosphors with enhanced efficiency, tunable photoluminescence, and improved thermal stability. Science Advances, 5 eaav0363. 
Added by: Richard Baschera (2019-02-22 10:09:11)   Last edited by: Richard Baschera (2019-02-22 10:13:30)
Type de référence: Article
DOI: 10.1126/sciadv.aav0363
Clé BibTeX: Zhao2019
Voir tous les détails bibliographiques
Catégories: INTERNATIONAL, MIOPS
Créateurs: Chuang, Gautier, Huang, Liu, Molokeev, Ning, Poeppelmeier, Xia, Zhang, Zhao, Zhou
Collection: Science Advances
Consultations : 10/345
Indice de consultation : 3%
Indice de popularité : 0.75%
Résumé     
Solid-state phosphor-converted white light-emitting diodes (pc-WLEDs) are currently revolutionizing the lighting industry. To advance the technology, phosphors with high efficiency, tunable photoluminescence, and high thermal stability are required. Here, we demonstrate that a simple lithium incorporation in NaAlSiO4: Eu system enables the simultaneous fulfillment of the three criteria. The Li substitution at Al sites beside Na sites in NaAlSiO4: Eu leads to an enhanced emission intensity/efficiency owing to an effective Eu3+ to Eu2+ reduction, an emission color tuning from yellow to green by tuning the occupation of different Eu sites, and an improvement of luminescence thermal stability as a result of the interplay with Li-related defects. A pc-WLED using the Li-codoped NaAlSiO4: Eu as a green component exhibits improved performance. The phosphors with multiple activator sites can facilitate the positive synergistic effect on luminescence properties.
  
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