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.

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.

Deep red emission in Eu2+-activated Sr4(PO4)2O phosphors for blue-pumped white LEDs

2015 ◽  
Vol 3 (28) ◽  
pp. 7356-7362 ◽  
Author(s):  
Naoyuki Komuro ◽  
Masayoshi Mikami ◽  
Paul J. Saines ◽  
Katsuhiro Akimoto ◽  
Anthony K. Cheetham
Keyword(s):  
Excitation Peak ◽  
Red Phosphor ◽  
Red Emission ◽  
Blue Led ◽  
White Leds

The deep red phosphor Sr4(PO4)2O:Eu2+, which has an excitation peak around 450 nm for blue LED applications, is reported.

A novel double-perovskite Gd2ZnTiO6:Mn4+red phosphor for UV-based w-LEDs: structure and luminescence properties

2016 ◽  
Vol 4 (12) ◽  
pp. 2374-2381 ◽  
Author(s):  
Hui Chen ◽  
Hang Lin ◽  
Qingming Huang ◽  
Feng Huang ◽  
Ju Xu ◽  
...  
Keyword(s):  
Double Perovskite ◽  
Luminescence Properties ◽  
Red Phosphor ◽  
White Leds

This work highlights a novel double-perovskite red phosphor Gd2ZnTiO6:Mn4+for UV-based warm white LEDs.

VUV-Photoluminescence Properties of (Gd, La)2O2CO3: Eu3+

2014 ◽  
Vol 1052 ◽  
pp. 203-206
Author(s):  
Zhi Long Wang ◽  
Shi Qin Wang ◽  
Nin Yao ◽  
Xing Min Wei
Keyword(s):  
Charge Transfer ◽  
Vacuum Ultraviolet ◽  
Charge Transfer Band ◽  
Broad Band ◽  
Photoluminescence Properties ◽  
Flux Method ◽  
Excitation Spectra ◽  
Red Emission ◽  
Ultraviolet Excitation

(Gd,La)2-x O2CO3:Eux3+(0.01 ≤x≤0.04) were synthesized via a flux method at 400°C, and their photoluminescence properties under vacuum ultraviolet (VUV) excitation were examined. The excitation spectra showed two bands in the region from 125 nm to 300 nm, the first band centered at 190 nm was ascribed to absorption of related CO32- complex, and the second broad band centered at 246nm and 278nm in Gd2O2CO3:Eu3+ was ascribed to the charge transfer band of O2-→ Eu3+. Series samples exhibited red emission at around 611 nm under vacuum ultraviolet excitation corresponding to the 5D0→ 7F2.transition of Eu3+.

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

2014 ◽  
Vol 2 (20) ◽  
pp. 3879-3884 ◽  
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.

Optimized photoluminescence of red phosphor Na2 SnF6 :Mn4+ as red phosphor in the application in “warm” white LEDs

2017 ◽  
Vol 100 (5) ◽  
pp. 2005-2015 ◽  
Author(s):  
Luqing Xi ◽  
Yuexiao Pan ◽  
Xian Chen ◽  
Shaoming Huang ◽  
Mingmei Wu
Keyword(s):  
Red Phosphor ◽  
White Leds

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,...

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