Surface-induced phase engineering and defect passivation of perovskite nanograins for efficient red light-emitting diodes

Nanoscale ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 340-348
Author(s):  
Yong-Chun Ye ◽  
Yanqing Li ◽  
Yu Tian ◽  
Xiao-Yi Cai ◽  
Yang Shen ◽  
...  
Keyword(s):  
Surface Engineering ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Red Emission ◽  
Light Emitting ◽  
Defect Passivation ◽  
Phase Engineering

Efficient and stable red-emission perovskite light-emitting diodes with an EQE of 17.1% are realized by guanidinium iodide-assisted surface engineering.

Phase-transition-induced giant enhancement of red emission in Mn4+-doped fluoride elpasolite phosphors

2018 ◽  
Vol 6 (15) ◽  
pp. 3951-3960 ◽  
Author(s):  
Yiwen Zhu ◽  
Daqin Chen ◽  
Lin Huang ◽  
Yong Liu ◽  
Mikhail G. Brik ◽  
...  
Keyword(s):  
Phase Transition ◽  
White Light ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Luminescence Properties ◽  
Red Emission ◽  
Light Emitting ◽  
Significant Interest ◽  
Light Components ◽  
White Light Emitting Diodes

Mn4+-Doped red fluoride phosphors have attracted significant interest of researchers because of their excellent luminescence properties that can address the issue of the lack of red light components in commercial white light-emitting-diodes (WLEDs).

scholarly journals Understanding the luminescent nature of organic radicals for efficient doublet emitters and pure-red light-emitting diodes

2020 ◽  
Vol 19 (11) ◽  
pp. 1224-1229 ◽  
Author(s):  
Alim Abdurahman ◽  
Timothy J. H. Hele ◽  
Qinying Gu ◽  
Jiangbin Zhang ◽  
Qiming Peng ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Red Light ◽  
Organic Radicals ◽  
Light Emitting

Synthesis and Characterization of Thieno[3,4-b]pyrazine Materials for Solution-processible Organic Red Light-emitting Diodes

2011 ◽  
Vol 40 (4) ◽  
pp. 417-419 ◽  
Author(s):  
Qing Li ◽  
Jiuyan Li ◽  
Lijun Deng ◽  
Qian Wang ◽  
Zhanxian Gao ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Red Light ◽  
Synthesis And Characterization ◽  
Light Emitting

(K0.5Na0.5)NbO3:Eu3+/Bi3+: a novel, highly efficient, red light-emitting material with superior water resistance behavior

RSC Advances ◽  
2015 ◽  
Vol 5 (6) ◽  
pp. 4707-4715 ◽  
Author(s):  
Qiwei Zhang ◽  
Haiqin Sun ◽  
Tao Kuang ◽  
Ruiguang Xing ◽  
Xihong Hao
Keyword(s):  
Blue Light ◽  
White Light ◽  
High Performance ◽  
Water Resistance ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Light Emitting ◽  
Highly Efficient ◽  
White Light Emitting Diodes

Materials emitting red light (∼611 nm) under excitation with blue light (440–470 nm) are highly desired for fabricating high-performance white light-emitting diodes (LEDs).

scholarly journals (Y,Gd)BO3:Eu red phosphor for dual-layer phosphor structure to enhance the optical performance of white light-emitting diodes

2021 ◽  
Vol 10 (4) ◽  
pp. 1930-1935
Author(s):  
Phan Xuan Le ◽  
Le Hung Tien
Keyword(s):  
White Light ◽  
Light Emitting Diodes ◽  
Red Light ◽  
Phosphor Layer ◽  
Light Emitting ◽  
Conformal Coating ◽  
Color Quality ◽  
Remote Phosphor ◽  
White Light Emitting Diodes ◽  
Color Rendering

Among the structures using for fabricating white light-emitting diodes (WLEDs) such as the conformal coating or in-cup geometries, the remote phosphor structure gives the highest luminous efficacy. However, in terms of color quality, its performance is not as good as the others. The red-light compensation has been reported as the effective solution for enhancing the color quality of WLEDs. Hence, this study adopted the idea and applied to the dual-layer phosphor structure. The phosphor used to boost the red color in light formation is (Y,Gd)BO3:Eu particle. The dual-layer remote phosphor structure was simulated with the red (Y,Gd)BO3:Eu phosphor layer above the original yellow phosphor YAG:Ce3+ one. The WLEDs with different correlated color temperatures of 5600 K, 6600 K and 7700K were experimented. Mie-theory and Lambert-Beer law were applied to examine the results. The growth in color rendering index (CRI) and color quality scale (CQS) with the increase of (Y,Gd)BO3:Eu phosphor concentration was observed. Nevertheless, the lumen efficacy would be degraded if the concentration was over a certain number. The information provided in this article is useful for the development of high-power WLED production with greater color quality.

scholarly journals Yellow-red light-emitting diodes using periodic Ga-flow interruption during deposition of InGaN well

2017 ◽  
Vol 25 (13) ◽  
pp. 15152 ◽  
Author(s):  
Kwanjae Lee ◽  
Hamin Lee ◽  
Cheul-Ro Lee ◽  
Tae-Hoon Chung ◽  
Yoon Seok Kim ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Red Light ◽  
Light Emitting ◽  
Flow Interruption
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