Tri-chromatic white-light emission from a single-phase Ca9Sc(PO4)7:Eu2+,Tb3+,Mn2+ phosphor for LED applications

2015 ◽  
Vol 44 (39) ◽  
pp. 17241-17250 ◽  
Author(s):  
Lihong Jiang ◽  
Ran Pang ◽  
Da Li ◽  
Wenzhi Sun ◽  
Yonglei Jia ◽  
...  

A wide range color-tunable tri-chromatic Ca9Sc(PO4)7:Eu2+,Tb3+,Mn2+ w-LED phosphor was obtained based on the efficient Eu2+ to Tb3+ and Eu2+ to Mn2+ energy transfer processes.

2019 ◽  
Vol 213 ◽  
pp. 494-503 ◽  
Author(s):  
Hai Guo ◽  
Zhigang Zheng ◽  
Liming Teng ◽  
Rongfei Wei ◽  
Fangfang Hu

2018 ◽  
Vol 47 (19) ◽  
pp. 6860-6867 ◽  
Author(s):  
Chao Li ◽  
Hongwei Zheng ◽  
Hengwei Wei ◽  
Shijie Qiu ◽  
Ling Xu ◽  
...  

Achieving tunable color and white light emission in a single phase phosphor is a challenging issue.


2020 ◽  
Vol 222 ◽  
pp. 117122
Author(s):  
H. Félix-Quintero ◽  
E.V. Mejía-Uriarte ◽  
C. Falcony ◽  
D. Acosta ◽  
J. Hernández A ◽  
...  

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Ning Liu ◽  
Lefu Mei ◽  
Libing Liao ◽  
Jie Fu ◽  
Dan Yang

Abstract What ideal w-LED phosphors always aim to do is to achieve a single phase near-sunlight emission phosphor simultaneously with both high luminescence efficiency and high thermal stability at operation temperature. And It is well known that apatite compound phosphors are one of the most promising optical materials to realize those above because of their unique structure enhanced luminescence properties and thermal stability. Here, we synthesized a co-doped single phase apatite phosphors Ca2La8(SiO4)6O2:Dy3+/Sm3+ (CLSO:Dy3+/Sm3+) for white light emission, which was provided with excellent thermal stability and of which luminescence intensity at 150 °C still was 92 percentage of that at room temperature. Moreover, X-ray diffraction technique, Fourier transform infrared spectroscopy, scanning electron microscope were employed to characterization of phase structure and morphology, and consequently pure apatite structure and gravel-like morphology of phosphors were proved. Analysis of photoluminescence spectra indicated that concentration quenching effect exist in single-doped CLSO:Dy3+ phosphors owing to dipole-dipole interaction between Dy3+ ions. It is revealed that maybe exist Dy3+ ↔ Sm3+ bilateral non-radiative energy transfer processes in Dy3+/Sm3+ co-doped CLSO system by PL spectra and decay curves. And variation of Sm3+ ion concentration can control color emission, namely CIE chromaticity coordinates and correlated color temperature, finally to achieve white light emission (0.309,0.309) with CCT 6848 K, able to be a potential candidate for commercial lighting applications.


2019 ◽  
Vol 87 ◽  
pp. 63-69 ◽  
Author(s):  
Marta Sołtys ◽  
Agata Górny ◽  
Lidia Zur ◽  
Maurizio Ferrari ◽  
Giancarlo C. Righini ◽  
...  

Author(s):  
Tao Hu ◽  
Lei Xia ◽  
Wen Liu ◽  
Jiyang Xie ◽  
Zuimin Jiang ◽  
...  

Host-sensitized rare-earth-ion lighting has emerged as a promising route to realize single-phase white-light emission due to effectively overcoming the self-absorption problems within multiple phosphors. However, the involved energy transfer mechanism...


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