Li substituent tuning of LED phosphors with enhanced efficiency, tunable photoluminescence, and improved thermal stability

Ming Zhao, Zhiguo Xia, Xiaoxiao Huang, Lixin Ning, Romain Gautier, Maxim S. Molokeev, Yayun Zhou, Yu Chun Chuang, Qinyuan Zhang, Quanlin Liu, Kenneth R Poeppelmeier

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

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 interplaywith Li-related defects. A pc-WLED using the Li-codoped NaAlSiO4:Eu as a green component exhibits improved performance. The phosphorswithmultiple activator sites can facilitate the positive synergistic effect on luminescence properties.

Original languageEnglish
Article numbereaav0363
JournalStudies in Spanish and Latin American Cinemas
Volume15
Issue number3
DOIs
Publication statusPublished - Jan 1 2019

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Phosphors
Light emitting diodes
Photoluminescence
Thermodynamic stability
Tuning
efficiency
Luminescence
substitution
work environment
occupation
industry
Lithium
Substitution reactions
Lighting
Color
performance
Defects
Industry

ASJC Scopus subject areas

  • Cultural Studies
  • Communication
  • Visual Arts and Performing Arts

Cite this

Li substituent tuning of LED phosphors with enhanced efficiency, tunable photoluminescence, and improved thermal stability. / Zhao, Ming; Xia, Zhiguo; Huang, Xiaoxiao; Ning, Lixin; Gautier, Romain; Molokeev, Maxim S.; Zhou, Yayun; Chuang, Yu Chun; Zhang, Qinyuan; Liu, Quanlin; Poeppelmeier, Kenneth R.

In: Studies in Spanish and Latin American Cinemas, Vol. 15, No. 3, eaav0363, 01.01.2019.

Research output: Contribution to journalArticle

Zhao, Ming ; Xia, Zhiguo ; Huang, Xiaoxiao ; Ning, Lixin ; Gautier, Romain ; Molokeev, Maxim S. ; Zhou, Yayun ; Chuang, Yu Chun ; Zhang, Qinyuan ; Liu, Quanlin ; Poeppelmeier, Kenneth R. / Li substituent tuning of LED phosphors with enhanced efficiency, tunable photoluminescence, and improved thermal stability. In: Studies in Spanish and Latin American Cinemas. 2019 ; Vol. 15, No. 3.
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AU - Molokeev, Maxim S.

AU - Zhou, Yayun

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