scholarly journals Broad red-emission of Sr3Y2Ge3O12:Eu2+ garnet phosphors under blue excitation for warm WLED applications

RSC Advances ◽  
2017 ◽  
Vol 7 (22) ◽  
pp. 13281-13288 ◽  
Author(s):  
Sk. Khaja Hussain ◽  
Jae Su Yu
Keyword(s):  
Red Phosphor ◽  
Red Emission ◽  
Blue Excitation

By blending a novel Sr3Y2Ge3O12:Eu2+ red phosphor with a commercial Y3Al5O12:Ce3+ phosphor, a warm WLED was fabricated with a CRI value of 85.81.

Novel Mn4+-activated layered oxide-fluoride perovskite-type KNaMoO2F4 red phosphor for wide gamut warm white light-emitting diodes backlight

2021 ◽  
Author(s):  
Jiao Wu ◽  
Bo Wang ◽  
Zhiyuan Liu ◽  
Kang Zhang ◽  
Xiaoshuang Li ◽  
...  
Keyword(s):  
Solid State ◽  
White Light ◽  
Light Emitting Diodes ◽  
Solid State Lighting ◽  
Red Phosphor ◽  
Red Emission ◽  
Light Emitting ◽  
Warm White Light ◽  
White Light Emitting Diodes ◽  
Perovskite Type

Mn4+-activated oxidefluoride phosphors are attractive for application in wide solid-state lighting devices because of its distinct red emission at about 630 nm and the abundant storage of Mn4+ ion. However,...

A highly-efficient blue-light excitable red phosphor: intramolecular π-stacking interactions in one dinuclear europium(iii) complex

2016 ◽  
Vol 45 (7) ◽  
pp. 2839-2844 ◽  
Author(s):  
Zhengliang Wang ◽  
Hui Yang ◽  
Pei He ◽  
Yonghui He ◽  
Jishou Zhao ◽  
...  
Keyword(s):  
Blue Light ◽  
Stacking Interactions ◽  
Red Phosphor ◽  
Red Emission ◽  
Highly Efficient ◽  
Π Stacking ◽  
Light Excitation

The europium(iii) complex [Eu2(2,7-BTFDBC)(DBM)4(Phen)2] with multiple T-shaped and parallel-displaced π-stacking interactions exhibits intense red emission under blue light excitation with high colour purity.

scholarly journals Strongly enhanced luminescence of Sr4Al14O25:Mn4+phosphor by co-doping B3+and Na+ions with red emission for plant growth LEDs

RSC Advances ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 1469-1476 ◽  
Author(s):  
Jiaqi Long ◽  
Xuanyi Yuan ◽  
Chaoyang Ma ◽  
Miaomiao Du ◽  
Xiaoli Ma ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Plant Growth ◽  
Emission Spectrum ◽  
Chlorophyll B ◽  
Red Phosphor ◽  
Red Emission ◽  
Co Doping ◽  
Na Ions ◽  
Enhanced Luminescence ◽  
Blue Chip

(a) Emission spectrum of LEDs fabricated with 445 nm blue chip and Sr2Si5N8:Eu2+red phosphor. (b) Emission spectrum of LEDs fabricated with 445 nm blue chip and Sr4Al14O25:Mn4+phosphor. (c and d) Absorption spectrum of chlorophyll-b and chlorophyll-a.

Multi-peaked broad-band red phosphor Y3Si6N11:Pr3+ for white LEDs and temperature sensing

2020 ◽  
Vol 49 (48) ◽  
pp. 17779-17785
Author(s):  
Dashuai Sun ◽  
Liangliang Zhang ◽  
Zhendong Hao ◽  
Hao Wu ◽  
Huajun Wu ◽  
...  
Keyword(s):  
Broad Band ◽  
Temperature Sensing ◽  
Red Phosphor ◽  
Red Emission ◽  
White Leds

The origin of multi-peaked broad-band red emission of the Y3Si6N11:Pr3+ phosphor and its application in WLED and temperature sensing.

Highly efficient red phosphor Cs2GeF6:Mn4+for warm white light-emitting diodes

RSC Advances ◽  
2015 ◽  
Vol 5 (100) ◽  
pp. 82409-82414 ◽  
Author(s):  
Zhengliang Wang ◽  
Yayun Zhou ◽  
Yong Liu ◽  
Qiang Zhou ◽  
Lijun Luo ◽  
...  
Keyword(s):  
Cation Exchange ◽  
White Light ◽  
Light Emitting Diodes ◽  
Exchange Method ◽  
Red Phosphor ◽  
Red Emission ◽  
Light Emitting ◽  
Highly Efficient ◽  
Warm White Light ◽  
White Light Emitting Diodes

Red phosphor Cs2GeF6:Mn4+synthesized by the cation exchange method exhibits an intense red emission with a high colour-purity. The warm WLED fabricated with this phosphor emits an intense white light under 20 mA current excitation.

Synthesis and Photoluminescence Properties of the Novel Red Phosphor Gd2MoB2O9: Eu

2011 ◽  
Vol 311-313 ◽  
pp. 1327-1331 ◽  
Author(s):  
Ling He ◽  
Wei Min Sun ◽  
Yu Tian Ding ◽  
Yu Hua Wang
Keyword(s):  
Solid State ◽  
Broad Band ◽  
Emission Peak ◽  
The Novel ◽  
Excitation Band ◽  
Photoluminescence Properties ◽  
Red Phosphor ◽  
Red Emission ◽  
Main Emission Peak ◽  
Red Luminescence

A novel phosphor, Gd2MoB2O9:Eu3+ has been synthesized by solid-state reaction and its photoluminescence in UV-VUV range are investigated. A sharp excitation band is observed in the region of 120–135 nm, which is related to the charge-transfer (CT) band of Gd3+. The broad band around 135–160 nm can be assigned to the BO3 host absorption. The broad bands around 248 nm are assigned to the CT band of Eu3+-O2-. The phosphors emit strong red luminescence centered at about 591 nm, 614 nm and 626 nm due to the5D0–7F1 and 5D0–7F2 transitions of Eu3+. The main emission peak under 254 and 147 nm excitations also shows different shifts with increasing Eu3+ concentration. This could be due to the different luminescence sites selected at high doping concentrations of Eu3+. Gd2MoB2O9:Eu3+ shows the pure red emission under both 254 and 147 nm excitations.

Synthesis of Sr2Si5N8:Eu2+ Phosphor for Enhanced Red Emission

2011 ◽  
Vol 233-235 ◽  
pp. 2705-2709 ◽  
Author(s):  
Van Duong Luong ◽  
Wen Tao Zhang ◽  
Hong Ro Lee
Keyword(s):  
Single Phase ◽  
Luminescence Properties ◽  
Heating Process ◽  
X Ray Diffraction ◽  
Red Phosphor ◽  
Red Emission ◽  
Light Emitting ◽  
White Leds ◽  
Xrd Patterns ◽  
White Light Emitting Diodes

For removing impurities to improve luminescence properties, Eu2+- activated Sr2Si5N8 red phosphor for white light-emitting diodes (LEDs) was prepared by multiple heat-treatment synthesis which includes carbothermal reduction and nitridation. The X-ray diffraction (XRD) patterns were showed the standard single phase of Sr2Si5N8. With an optimized amount of Eu2+ (2 at. %) dopant, the broad excitation band of Sr2Si5N8:Eu2+ indicated that the phosphor was suitable for application of white LEDs with UV or blue chip, and red emission peak at 628 nm in spectra originating from the 4f65d1→4f7 transition of Eu2+ ion. After third heating process, luminescence properties of the obtained phosphor were improved obviously and higher than commercial YAG:Ce3+ phosphor.

Multicolor tunable yellow-red emission in Eu/Er:LiNbO 3 under ultraviolet and blue excitation

2017 ◽  
Vol 97 ◽  
pp. 111-115 ◽  
Author(s):  
Zhengyu Zhang ◽  
Xunze Tang ◽  
Yannan Qian ◽  
Haiyan Zhang ◽  
Wenguang Wang ◽  
...  
Keyword(s):  
Red Emission ◽  
Blue Excitation

Strong f ‐ f Excitation and Bright Red Emission in Cd 4 Gd 1‐ x Eu x O(BO 3 ) 3 (0≤ x ≤1): Near‐UV LED Pumped Red Phosphor with Low Thermal Quenching

2019 ◽  
Vol 14 (9) ◽  
pp. 1541-1548 ◽  
Author(s):  
Chao Yin ◽  
Mufei Yue ◽  
Pengfei Jiang ◽  
Ruirui Yang ◽  
Xianju Zhou ◽  
...  
Keyword(s):  
Thermal Quenching ◽  
Red Phosphor ◽  
Red Emission ◽  
Uv Led
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