Enhanced Luminescence Efficiency for Bi, Eu Doped Y<sub>2</sub>O<sub>3</sub> Red Phosphors for White LEDs

Bi and Eu co-doped Y2O3 was used as a red phosphor with a very high efficiency synthesized by the solid state reaction and co-precipitation The emission spectrum consisted of a weak band at 581, 587, 593 and 599 nm corresponding to the 5D0 → 7F1 transition, with sharp peaks of maximum intensity occurring at about 611 nm due to the 5D0 → 7F2 transition of Eu3+. In addition, the excitation spectrum exhibited a broad band between 250 and 550 nm with peaks occurring at about 310 – 400 nm and a sharp peak at 465.5 nm. The relative emission intensity was improved by co-precipitation synthesis as compared to solid state reaction synthesis. This implies that an appropriate co-precipitation synthesis could improve the luminescent efficiency, particularly for the samples prepared with the optimized firing temperature of 1100 °C.

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Enhanced luminescence properties of Ca1+xSr2−xAl2O6:Eu3+ (0 ≤ x ≤ 1) red phosphors based on composition modulation

RSC Advances ◽

10.1039/d1ra01291f ◽

2021 ◽

Vol 11 (21) ◽

pp. 12981-12989

Author(s):

Biao Shen ◽

Jianghang Xu ◽

Qinan Mao ◽

Jiasong Zhong

Keyword(s):

Optical Properties ◽

Quantum Efficiency ◽

Luminescence Properties ◽

Composition Modulation ◽

Red Phosphors ◽

Potential Applications ◽

Enhanced Luminescence

A series of Ca1+xSr2−xAl2O6:Eu3+ (0 ≤ x ≤ 1) red-emitting phosphors with adjustable optical properties and excellent quantum efficiency was developed for potential applications in warm WLEDs.

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Reverse Lyotropic Liquid Crystals from Europium Nitrate and P123 with Enhanced Luminescence Efficiency

The Journal of Physical Chemistry B ◽

10.1021/jp507745s ◽

2014 ◽

Vol 118 (39) ◽

pp. 11581-11590 ◽

Cited By ~ 15

Author(s):

Sijing Yi ◽

Qintang Li ◽

Hongguo Liu ◽

Xiao Chen

Keyword(s):

Liquid Crystals ◽

Lyotropic Liquid Crystals ◽

Europium Nitrate ◽

Luminescence Efficiency ◽

Enhanced Luminescence

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Synthesis, photoluminescence and Judd–Ofelt analysis of red LiGd5P2O13 : Eu3+ phosphors for white LEDs

RSC Advances ◽

10.1039/c5ra06680h ◽

2015 ◽

Vol 5 (67) ◽

pp. 54622-54628 ◽

Cited By ~ 48

Author(s):

Xinguo Zhang ◽

Liya Zhou ◽

Qi Pang ◽

Menglian Gong

Keyword(s):

Thermal Stability ◽

Solid State ◽

Quantum Yield ◽

Solid State Reaction ◽

Red Light ◽

Solid State Reaction Method ◽

Reaction Method ◽

White Leds ◽

Good Thermal Stability ◽

Red Phosphors

LiGd5P2O13 : Eu3+ red phosphors were prepared by solid-state reaction method. Phosphors could be efficiently excited by NUV/blue light and emit pure-red light. LiGd5P2O13 : Eu3+ shows good thermal stability with quantum yield of 46.5%.

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The formation mechanism, improved photoluminescence and LED applications of red phosphor K2SiF6:Mn4+

Journal of Materials Chemistry C ◽

10.1039/c4tc00087k ◽

2014 ◽

Vol 2 (20) ◽

pp. 3879-3884 ◽

Cited By ~ 112

Author(s):

Lifen Lv ◽

Xianyu Jiang ◽

Shaoming Huang ◽

Xi'an Chen ◽

Yuexiao Pan

Keyword(s):

Formation Mechanism ◽

Manganese Oxides ◽

Experimental Results ◽

Red Phosphor ◽

White Leds ◽

Luminescence Efficiency

The formation mechanism of red phosphor K2SiF6:Mn4+ free of manganese oxides has been discussed based on detailed experimental results. Significant improvements in the luminescence efficiency make it a good candidate for applications in “warm” white LEDs.

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