TY - JOUR
T1 - Color-tunable photoluminescence and energy transfer of (Tb1-: XMnx)3Al2(Al1- xSix)3O12:Ce3+ solid solutions for white light emitting diodes
AU - Lang, Tianchun
AU - Han, Tao
AU - Zhao, Cong
AU - Cao, Shixiu
AU - Fang, Shuangqiang
AU - Li, Shuai
AU - Zhao, Lei
AU - Korepanov, Vladimir I.
AU - Yakovlev, Alexey N.
PY - 2018
Y1 - 2018
N2 - (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 4T1 → 6A1 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).
AB - (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 4T1 → 6A1 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).
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U2 - 10.1039/c8ra07994c
DO - 10.1039/c8ra07994c
M3 - Article
AN - SCOPUS:85056121633
VL - 8
SP - 36056
EP - 36062
JO - RSC Advances
JF - RSC Advances
SN - 2046-2069
IS - 63
ER -