Color-tunable photoluminescence and energy transfer of (Tb1-: XMnx)3Al2(Al1- xSix)3O12:Ce3+ solid solutions for white light emitting diodes

Tianchun Lang, Tao Han, Cong Zhao, Shixiu Cao, Shuangqiang Fang, Shuai Li, Lei Zhao, Vladimir I. Korepanov, Alexey N. Yakovlev

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

(Tb1-xMnx)3Al2(Al1-xSix)3O12:Ce3+ solid solution phosphors were synthesized by introducing the isostructural Mn3Al2(SiO4)3 (MAS) into Tb3Al5O12:Ce3+ (TbAG). Under 456 nm excitation, (Tb1-xMnx)3Al2(Al1-xSix)3O12:Ce3+ shows energy transfers (ET) in the host, which can be obtained from the red emission components to enhance color rendering. Moreover, (Tb1-xMnx)3Al2(Al1-xSix)3O12:Ce3+ (x = 0-0.2) exhibits substantial spectral broadening (68 → 86 nm) due to the 5d → 4f transition of Ce3+ and the 4T16A1 transition of Mn2+. The efficiency of energy transfer (ηT, Ce3+ → Mn2+) gradually increases with increasing Mn2+ content, and the value reach approximately 32% at x = 0.2. Namely, the different characteristics of luminescence evolution based on the effect of structural variation by substituting the (MnSi)6+ pair for the larger (TbAl)6+ pair. Therefore, with structural evolution, the luminescence of the solid solution phosphors could be tuned from yellow to orange-red, tunable by increasing the content of MAS for the applications of white light emitting diodes (wLED).

Original languageEnglish
Pages (from-to)36056-36062
Number of pages7
JournalRSC Advances
Volume8
Issue number63
DOIs
Publication statusPublished - 2018

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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