Luminescence properties of single-phase color-tunable Li4SrCa(Si2O4N8/3):Eu2+ phosphor for white light-emitting diodes

RSC Advances ◽  
2016 ◽  
Vol 6 (45) ◽  
pp. 38731-38740 ◽  
Author(s):  
Chenxia Li ◽  
Jian Dai ◽  
Hua Yu ◽  
Degang Deng ◽  
Jun Huang ◽  
...  
Keyword(s):  
White Light ◽  
Single Phase ◽  
Light Emitting Diodes ◽  
Color Temperature ◽  
White Led ◽  
Light Emitting ◽  
Color Coordinates ◽  
Uv Led ◽  
Color Tunable ◽  
White Light Emitting Diodes

A white LED consisting of a LSCSN:0.03Eu2+ phosphor and a 375 nm UV LED chip had CIE color coordinates of (0.3568, 0.3111) and achieved a Ra of 82.5 around the correlated color temperature of 3318 K.

Crystal structure and photoluminescence tuning of novel single-phase Ca8ZnLu(PO4)7:Eu2+,Mn2+ phosphors for near-UV converted white light-emitting diodes

2019 ◽  
Vol 7 (27) ◽  
pp. 8374-8382 ◽  
Author(s):  
Jing Yan ◽  
Ziwang Zhang ◽  
Dawei Wen ◽  
Jianbang Zhou ◽  
Yiqin Xu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
White Light ◽  
Single Phase ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Color Tunable ◽  
Color Rendering Index ◽  
White Light Emitting Diodes ◽  
Color Rendering

A single phase color-tunable white light emitting Ca8ZnLu(PO4)7:Eu2+,Mn2+ phosphor with high color rendering index has been rationally designed via combination of cyan and red emissions.

A promising single-phase, color-tunable phosphor (Ba0.9Sr0.1)9Lu2Si6O24: Eu2+, Mn2+ for near-ultraviolet white-light-emitting diodes

2019 ◽  
Vol 214 ◽  
pp. 116585 ◽  
Author(s):  
Rujia Dong ◽  
Wei Liu ◽  
Yanhua Song ◽  
Xiangting Zhang ◽  
Zhengce An ◽  
...  
Keyword(s):  
White Light ◽  
Single Phase ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Near Ultraviolet ◽  
Color Tunable ◽  
White Light Emitting Diodes

Ba1.3Ca0.7SiO4:Eu2+,Mn2+: A Promising Single-Phase, Color-Tunable Phosphor for Near-Ultraviolet White-Light-Emitting Diodes

2014 ◽  
Vol 53 (20) ◽  
pp. 11007-11014 ◽  
Author(s):  
Wenzhen Lv ◽  
Mengmeng Jiao ◽  
Qi Zhao ◽  
Baiqi Shao ◽  
Wei Lü ◽  
...  
Keyword(s):  
White Light ◽  
Single Phase ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Near Ultraviolet ◽  
Color Tunable ◽  
White Light Emitting Diodes

scholarly journals COLOR AND SPECTRAL CHARACTERISTICS OF WHITE LIGHT EMITTING DIODES AND THEIR VARIATION DURING AGING

Doklady BGUIR ◽  
2019 ◽  
pp. 39-45
Author(s):  
A. L. Gurkii ◽  
M. V. Masheda
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Spectral Characteristics ◽  
Color Temperature ◽  
Luminescence Spectra ◽  
White Led ◽  
Green Band ◽  
Blue Band ◽  
Light Emitting ◽  
White Light Emitting Diodes

The relation between numerical values of photometric characteristics (total luminous flux TLF, correlated color temperature CCT, color rendering index CRI) of white light emitting diodes (LED) and the variation of the spectral shape of their radiation during aging has been investigated. All the measurements were made on internationally adopted test methods, taking into account environmental conditions, electrical parameters and evaluated measurement uncertainty. Every piece of test and measurement equipment has actual verification or calibration with traceability to national and international references. It was demonstrated that in the luminescence spectra consisting of the “blue” band around 450 nm originating from the semiconductor heterostructure, and the broad “yellow” band from luminophor, the last band is nonelementary and consists of at least two bands: the “green” one around 530 nm and the “orange” one around 580 nm. The most unstable “green” band has the highest impact on photometric characteristics. As a consequence, further investigation should be performed on how instability of elementary bands and its quantity will link not only with photometric characteristics, but with production conditions and material properties of LED heterostructure and luminophor itself. In particular, for improvement of the color stability of white LED, the parameters of luminophor forming the “green” band should be stabilized. А unified method for accelerated testing of LED products and method for long-time lifetime prediction shall be developed, taking into account not only depreciation of TLF, but also shift of other photometric and spectral characteristics of white LED.

ChemInform Abstract: Ba1.3Ca0.7SiO4:Eu2+,Mn2+: A Promising Single-Phase, Color-Tunable Phosphor for Near-Ultraviolet White-Light-Emitting Diodes.

ChemInform ◽  
2014 ◽  
Vol 45 (51) ◽  
pp. no-no
Author(s):  
Wenzhen Lv ◽  
Mengmeng Jiao ◽  
Qi Zhao ◽  
Baiqi Shao ◽  
Wei Lue ◽  
...  
Keyword(s):  
White Light ◽  
Single Phase ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Near Ultraviolet ◽  
Color Tunable ◽  
White Light Emitting Diodes

Color tunable Eu-doped CaSrNb2O7 phosphors for white light-emitting diodes and optical thermometers

2020 ◽  
Vol 227 ◽  
pp. 117582
Author(s):  
Qianchao Ma ◽  
Qihu Li ◽  
Guangqing Zhang ◽  
Shuiquan Han ◽  
Qianxin Zhang ◽  
...  
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Color Tunable ◽  
White Light Emitting Diodes

Synthesis, structure and photoluminescence properties of a novel color-tunable Si1.92Al0.08O1.08N1.92:Eu2+,Tb3+,Sm2+phosphor for ultraviolet white light-emitting diodes

RSC Advances ◽  
2015 ◽  
Vol 5 (107) ◽  
pp. 88477-88484 ◽  
Author(s):  
Yichao Wang ◽  
Jianyan Ding ◽  
Yanyan Li ◽  
Yuhua Wang
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Photoluminescence Properties ◽  
Light Emitting ◽  
Color Tunable ◽  
White Light Emitting Diodes

The emission colors can be changed in the blue, green, red and even white.

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