scholarly journals Highly efficient, ultralow turn-on voltage red and white organic light-emitting devices based on a novel exciplex host

2021 ◽  
Author(s):  
Jian Song ◽  
Fujun Zhang ◽  
Liping Yang ◽  
Keming Chen ◽  
Asu Li ◽  
...  
Keyword(s):  
Power Efficiency ◽  
High Performance ◽  
Maximum Power ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Turn On ◽  
Highly Efficient ◽  
Organic Light ◽  
White Oleds ◽  
Organic Light Emitting Devices

We have prepared high-performance white OLEDs based on exciplex systems and blue ultra-thin FIrPic layers, exhibiting a low turn-on voltage of 2.2 V with a maximum power efficiency of 34.1 lm W−1, and the CIE coordinate (0.33,0.33) at 1000 cd m−2.

High-Efficient Non-Doped Type White Organic Light-Emitting Devices Using an Electron/Exciton Blocker

2005 ◽  
Vol 475-479 ◽  
pp. 1799-1804
Author(s):  
Wenfa Xie ◽  
Shi Yong Liu
Keyword(s):  
Power Efficiency ◽  
Maximum Power ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
White Region ◽  
Organic Light ◽  
High Efficient ◽  
Organic Electroluminescent ◽  
Cie Coordinates ◽  
Organic Light Emitting Devices

Non-doped type white organic electroluminescent (EL) devices have the following structure ITO/m-MTDATA (30nm) /NPB (20-dnm) /rubrene (0.1nm) /NPB (dnm) /DPVBi (20nm) /TPBi (20nm) /Alq (10nm) /LiF/Al were fabricated. The EL spectrum of the devices are dependent on the d and when d=3, the CIE coordinates of the device were well within the white region for voltage raging from 3V to 15V. This device has a luminance of 18950cd/m2 at 15V and maximum power efficiency of 5.65cd/A at 6V.

Highly Efficient and Unusual Structure White Organic Light-Emitting Devices Based on Phosphorescence Sensitized 5,6,11,12-Tetraphenylnaphthacene

2007 ◽  
Vol 364-366 ◽  
pp. 1095-1099
Author(s):  
Wen Long Jiang ◽  
Yu Duan ◽  
Hui Ying Li ◽  
De Chang Li ◽  
Gui Ying Ding
Keyword(s):  
Power Efficiency ◽  
Fluorescent Dye ◽  
Triplet Energy ◽  
Device Structure ◽  
Unusual Structure ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Highly Efficient ◽  
Organic Light ◽  
Organic Light Emitting Devices

Highly efficient and unusual structures white organic light-emitting devices were fabricated based on phosphorescence sensitized 5,6,11,12-tetraphenylnaphthacene. The device structure was ITO / NPB (30 nm)/CBP: 10% DPVBi (10 nm)/CBP (5 nm) /CBP:x% Ir(ppy)3 : y% rubrene (20 nm)/ CBP (5 nm)/ CBP: 10% DPVBi (10 nm)/BCP (10 nm)/ Alq3 (30 nm)/LiF(0.5 nm)/Al, where NPB is N,N '-bis- (1-naphthyl)- N,N ' –diphenyl -1, 1 '- biphenyl-4,4 '-diamine as a hole transporting layer, CBP 4,4,N,N’-dicarbazolebiphenyl as host,DPVBi is 4,4 '-bis(2,2 -diphenyl vinyl)-1,1 '-biphenyl as blue fluorescent dye，Rubrene is 5,6,11,12,-tetraphenylnaphthacene as fluorescent dye,Ir(ppy)3 is factris (2-phenylpyridine) iridium as phosphorescent sensitizer .BCP is 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline as hole-blocking layer, and Alq3 is tris(8- hydroxyquinoline) aluminum as an electron-transporting layer. In this device, phosphorescent emissive layer was sandwiched between two blue fluorescent doped ones. This architecture allowed for resonant energy transfer from both the host singlet and triplet energy levels that minimized exchange energy losses. Thus, a WOLED with a maximum luminous efficiency of 11.63 cd/A, a maximum power efficiency of 7.37 lm/W, a maximum luminance of 31770cd/m2, and Commission Internationale de L’Eclairage coordinates of (0.34.0.36) was achieved.

scholarly journals Tailoring the Spectra of White Organic Light-Emitting Devices by Trap Effect of a Concentration-Insensitive Dopant

2013 ◽  
Vol 2013 ◽  
pp. 1-6
Author(s):  
Qi Wang ◽  
Junsheng Yu ◽  
Ming Li ◽  
Zhiyun Lu
Keyword(s):  
High Power ◽  
Power Efficiency ◽  
High Performance ◽  
Iridium Complex ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices ◽  
Doping Ratio ◽  
High Power Efficiency

Highly efficient phosphorescent organic light-emitting devices (PhOLEDs) had been fabricated by using a novel iridium complex, bis[2-(3′,5′-di-tert-butylbiphenyl-4-yl)benzothiazolato-N,C2′]iridium(III) (acetylacetonate) [(tbpbt)2Ir(acac)], as the emitter. With a wide doping ratio ranging from 15 wt% to 25 wt%, the PhOLEDs maintained a comparable high performance, indicating concentration-insensitive property of the (tbpbt)2Ir(acac). On the basis of the unique characteristic of concentration insensitivity, the application of this phosphor was explored by fabricating white organic light-emitting devices (WOLEDs) with altered doping ratio, indicating that trap effect of (tbpbt)2Ir(acac) could effectively tailor WOLEDs spectra. Typically, a high-power efficiency, current efficiency, and external quantum efficiency of 30.0 lm/W, 38.8 cd/A, 18.1%, were achieved by 20 wt% doped WOLEDs.

A novel nicotinonitrile derivative as an excellent multifunctional blue fluorophore for highly efficient hybrid white organic light-emitting devices

2015 ◽  
Vol 3 (34) ◽  
pp. 8817-8823 ◽  
Author(s):  
Wei Liu ◽  
Zhan Chen ◽  
Cai-Jun Zheng ◽  
Xiao-Ke Liu ◽  
Kai Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Highly Efficient ◽  
Organic Light ◽  
Organic Light Emitting Devices

A multifunctional compound that serves as both an efficient blue fluorescent emitter and a high performance host for various phosphors simultaneously.

Applying intermolecular hydrogen bonding to exploit TADF emitters for high-performance orange-red non-doped OLEDs

2021 ◽  
Author(s):  
Yi-Zhong Shi ◽  
Kai Wang ◽  
Xiao-Chun Fan ◽  
Hao Wu ◽  
Xuemei Ou ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
High Performance ◽  
Intermolecular Hydrogen Bonding ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Highly Efficient ◽  
Radiative Transitions ◽  
Organic Light ◽  
Organic Light Emitting Devices

Exploiting novel TADF emitters for highly efficient orange-red non-doped organic light-emitting devices (OLEDs) is a research hotspot. Nevertheless, serious non-radiative transitions of the electrogenerated excitons significantly hinder the pace of...

Structurally robust phosphorescent [Pt(O^N^C^N)] emitters for high performance organic light-emitting devices with power efficiency up to 126 lm W−1 and external quantum efficiency over 20%

2014 ◽  
Vol 5 (12) ◽  
pp. 4819-4830 ◽  
Author(s):  
Gang Cheng ◽  
Steven C. F. Kui ◽  
Wai-Hung Ang ◽  
Man-Ying Ko ◽  
Pui-Keong Chow ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Power Efficiency ◽  
High Performance ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Organic Light Emitting Devices ◽  
White Oled

Practical strongly phosphorescent platinum(II) green to white OLED emitters with bulky tetradentate O^N^C^N ligands.

Dendritic Luminescent Gold(III) Complexes for Highly Efficient Solution-Processable Organic Light-Emitting Devices

2012 ◽  
Vol 52 (1) ◽  
pp. 446-449 ◽  
Author(s):  
Man-Chung Tang ◽  
Daniel Ping-Kuen Tsang ◽  
Maggie Mei-Yee Chan ◽  
Keith Man-Chung Wong ◽  
Vivian Wing-Wah Yam
Keyword(s):  
Efficient Solution ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Highly Efficient ◽  
Organic Light ◽  
Solution Processable ◽  
Organic Light Emitting Devices

scholarly journals Luminescent zinc(ii) and copper(i) complexes for high-performance solution-processed monochromic and white organic light-emitting devices

2015 ◽  
Vol 6 (8) ◽  
pp. 4623-4635 ◽  
Author(s):  
Gang Cheng ◽  
Gary Kwok-Ming So ◽  
Wai-Pong To ◽  
Yong Chen ◽  
Chi-Chung Kwok ◽  
...  
Keyword(s):  
High Performance ◽  
Platinum Group Metals ◽  
Solution Processed ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Cie Coordinates ◽  
Organic Light Emitting Devices ◽  
Platinum Group

High performance orange (EQE up to 15.64%) and white (EQE up to 6.88%) solution processed OLEDs fabricated solely with emitters of non-platinum group metals were reported. The white device has CIE coordinates of (0.42, 0.44) and CRI of 81.

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