Design of Highly Efficient Deep-red Emission in Mn4+ Doped New-Type Structure CaMgAl10O17 for Plant Growth LED Light

2021 ◽  
Author(s):  
Yunpeng Zhou ◽  
Takatoshi Seto ◽  
Ziyong Kang ◽  
Yuhua Wang
Keyword(s):  
Plant Growth ◽  
Light Emitting Diodes ◽  
Luminous Efficiency ◽  
Stable Structure ◽  
Type Structure ◽  
Red Emission ◽  
Light Emitting ◽  
Led Light ◽  
Highly Efficient ◽  
New Type

Abstract The auxiliary light equipment for plant growth requires phosphor-converted light-emitting-diodes (pc-LEDs) with high luminous efficiency and stable structure, and the properties of phosphors highly determine the performance of the...

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.

High-Efficiency White Organic Light-Emitting Diodes Using Blue and Red Phosphorescent Materials with Exciton Blocking Layer

2008 ◽  
Vol 8 (9) ◽  
pp. 4607-4610
Author(s):  
Jung Hyun Park ◽  
Ji Hoon Seo ◽  
Ji Hyun Seo ◽  
Seok Jae Lee ◽  
Ja Ryong Koo ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Blue Emission ◽  
Luminous Efficiency ◽  
Organic Light Emitting Diodes ◽  
Blocking Layer ◽  
Maximum Luminance ◽  
Red Emission ◽  
Light Emitting ◽  
Organic Light

High-efficiency white organic light-emitting diodes (WOLEDs) were fabricated with two emissive layers and an exciton blocking layer (EBL) was sandwiched between two phosphorescent dyes, bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl) iridium III (FIrpic) as the blue emission and iridium(III) bis(5-acetyl-2-phenylpyridinato-N,C2′) acetylacetonate ((acppy)2Ir(acac)) as the red emission. This EBL effectively prevented a triple–triple energy transfer between the two phosphorescent emissive layers with blue and red emission. The white device showed Commission Internationale De L'Eclairage (CIEx,y) coordinates of (0.33, 0.42) at 22400 cd/m2, a maximum luminance of 27300 cd/m2 at 13.2 V, and a maximum luminous efficiency of 26.9 cd/A.

The Effects of Two Spacers on White Organic Light-Emitting Diodes

2008 ◽  
Vol 8 (9) ◽  
pp. 4584-4587 ◽  
Author(s):  
Ji Hoon Seo ◽  
Jun Ho Kim ◽  
Woo Young Kim ◽  
Kum Hee Lee ◽  
Seung Soo Yoon ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Luminous Efficiency ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light

The authors have demonstrated highly efficient white organic light-emitting diodes (WOLEDs) by using two emissive materials as a dopant, 1,4-Bis[2-(4′-diphenylaminobiphenyl-4-yl)vinyl]benzene (DABPV-ph) and iridium(III) bis(5-acetyl-2-phenylpyridinato-N,C2′) acetylacetonate ((acppy)2Ir (acac)). In these WOLEDs, 2-methyl-9,10-di(2-naphthyl)anthracene (MADN), and 4,4′-N,N′-dicarbazole-biphenyl (CBP) were used as a spacer among the three emissive layers. The maximum luminous efficiency of the three devices with no spacer, MADN and CBP as a spacer were 11.50, 8.32, and 25.70 cd/A at 0.08, 12.7, and 0.01 mA/cm2 and the Commission Internationale De L'Eclairage (CIEx,y) coordinates were (x = 0 21, y = 0.34), (x = 0.21, y = 0.34), and (x = 0.33, y = 0.33) at 11 V, respectively.

scholarly journals Enhancement of red emission and site analysis in Eu2+ doped new-type structure Ba3CaK(PO4)3 for plant growth white LEDs

2019 ◽  
Vol 356 ◽  
pp. 236-244 ◽  
Author(s):  
Jinmeng Xiang ◽  
Jiming Zheng ◽  
Ziwei Zhou ◽  
Hao Suo ◽  
Xiaoqi Zhao ◽  
...  
Keyword(s):  
Plant Growth ◽  
Type Structure ◽  
Red Emission ◽  
White Leds ◽  
Site Analysis ◽  
New Type

Novel bluish green benzimidazole-based iridium(iii) complexes for highly efficient phosphorescent organic light-emitting diodes

2017 ◽  
Vol 41 (5) ◽  
pp. 1973-1979 ◽  
Author(s):  
Jin-Hui Zhao ◽  
Yong-Xu Hu ◽  
Yan Dong ◽  
Xin Xia ◽  
Hai-Jun Chi ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Luminous Efficiency ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light ◽  
Bluish Green

Fluorinated benzimidazole-based Ir(iii) complexes were developed to regulate the emitting color and improve the luminous efficiency of Ir(iii) phosphors.

Red Phosphorescent Platinum(II) Complexes with Tetradentate Pyridine-Containing Ligands for Organic Light Emitting Diodes

2020 ◽  
Vol 20 (11) ◽  
pp. 6669-6674
Author(s):  
Jeongkyu Woo ◽  
Soo Kyung Kang ◽  
Ju Hee Han ◽  
Ki Ju Kim ◽  
Yu Ji Moon ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Power Efficiency ◽  
Light Emitting Diodes ◽  
Luminous Efficiency ◽  
Organic Light Emitting Diodes ◽  
Red Emission ◽  
Light Emitting ◽  
Organic Light ◽  
20 Nm

Here, red phosphorescent platinum(II) complexes based on tetradentate pyridine-containing lig-ands are studied. To investigate their electroluminescent properties, multilayer devices were fabricated in the following sequence; ITO (180 nm)/4,4′,4″-Tris[2-naphthyl(phenyl)amino]triphenylamine (2-TNATA) (30 nm)/N, N′-di(1-naphthyl)-N,N′-diphenyl-1,1′-biphenyl)4,4′-diamine (NPB) (20 nm)/ Tris(4-carbazoyl-9-ylphenyl)amine (TCTA) (10 nm)/4,4′-Bis(N-carbazolyl)-1,1′-biphenyl (CBP) (20 nm)/Platinum(II) complex (20 nm)/1,3,5-Tris(1-Phenyl-1H-benzimidazol-2-yl)benzene) (TPBi) (40 nm)/Liq (2 nm)/Al (100 nm). In particularly, a device using platinum(II) complex based on N-(3,5-di-tert-butylphenyl)-3-(pyridin-2-yl)-N-(3-(pyridin-2-yl)phenyl)benzenamineligand showed the efficient red emission, with a luminous efficiency, power efficiency, and external quantum efficiency of, and the Commission International de LEclairge (CIE) coordinates of 27.26 cd/A, 10.54 lm/W, 8.50% at 20 mA/cm2, and (0.65, 0.33) at 11.0 V, respectively.

A far-red emission (Ca,Sr)14Zn6Ga10O35:Mn4+ phosphor for potential application in plant-growth LEDs

2018 ◽  
Vol 47 (43) ◽  
pp. 15574-15582 ◽  
Author(s):  
Yibing Wu ◽  
Ying Lv ◽  
Kaibin Ruan ◽  
Zhi Xie
Keyword(s):  
Plant Growth ◽  
Potential Application ◽  
Light Emitting Diodes ◽  
Red Emission ◽  
Light Emitting

To facilitate phosphor-converted light-emitting diodes (LEDs) for plant growth, the development of phosphor materials with efficient red or far-red emission is essential.

Homoleptic mer-Ir(iii) complexes for highly efficient solution-processable green phosphorescent organic light-emitting diodes with high current efficiency

2020 ◽  
Vol 8 (18) ◽  
pp. 6086-6092 ◽  
Author(s):  
Athithan Maheshwaran ◽  
Vijaya Gopalan Sree ◽  
Raja Kumaresan ◽  
Ho-Yeol Park ◽  
Jungmin Choi ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Efficient Solution ◽  
Light Emitting Diodes ◽  
Luminous Efficiency ◽  
Organic Light Emitting Diodes ◽  
High Current ◽  
High Current Efficiency ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light

Highly efficient green-emitting phosphorescent Ir(iii) complexes with meridional configurations are introduced for solution-processed PHOLEDs that achieve high CE with high EQE. The unexpected high PLQYs leads to high luminous efficiency. 

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