scholarly journals Highly efficient red OLEDs using DCJTB as the dopant and delayed fluorescent exciplex as the host

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Bo Zhao ◽  
Tianyou Zhang ◽  
Bei Chu ◽  
Wenlian Li ◽  
Zisheng Su ◽  
...  
Keyword(s):  
Highly Efficient ◽  
Red Oleds

Substitution Effect on Carbazole-centered Donors for Tuning Exciplex Systems as Cohost for Highly Efficient Yellow and Red OLEDs

2021 ◽  
Author(s):  
Li-Ming Chen ◽  
I-Hung Lin ◽  
Yu-Chi You ◽  
Wei-Chih Wei ◽  
Meng-Ju Tsai ◽  
...  
Keyword(s):  
Substitution Effect ◽  
Exciplex Formation ◽  
Highly Efficient ◽  
Hole Transporting ◽  
Red Oleds ◽  
Hole Transporting Materials

Three new carbazole-based hole-transporting materials PTCz-9’Cz, PTCz-3’TCz, and PTCz-NTol2 were synthesized, characterized, and examined the propensity of exciplex formation with electron-transporting material PO-T2T. Through enhancing the electron-donating ability of the...

Substituent effects of iridium complexes for highly efficient red OLEDs

2005 ◽  
pp. 1583 ◽  
Author(s):  
Shinjiro Okada ◽  
Keiji Okinaka ◽  
Hironobu Iwawaki ◽  
Manabu Furugori ◽  
Masashi Hashimoto ◽  
...  
Keyword(s):  
Substituent Effects ◽  
Iridium Complexes ◽  
Highly Efficient ◽  
Red Oleds

Nearly 100% exciton utilization in highly efficient red OLEDs based on dibenzothioxanthone acceptor

2021 ◽  
Author(s):  
Xiaoxiao Hu ◽  
Yuanyuan Qin ◽  
Zhiyi Li ◽  
Honglei Gao ◽  
Teng Gao ◽  
...  
Keyword(s):  
Highly Efficient ◽  
Red Oleds

A novel bipolar phosphorescent host for highly efficient deep-red OLEDs at a wide luminance range of 1000–10 000 cd m−2

2015 ◽  
Vol 51 (63) ◽  
pp. 12544-12547 ◽  
Author(s):  
Yansong Feng ◽  
Ping Li ◽  
Xuming Zhuang ◽  
Kaiqi Ye ◽  
Tai Peng ◽  
...  
Keyword(s):  
Highly Efficient ◽  
Red Oleds ◽  
Very High ◽  
Luminance Range

A novel bipolar phosphorescent host FPYPCA with narrow Eg as well as high T1 realizes the most efficient deep-red PhOLED (R1–15), which maintains very high EQEs of >23% at rather high and wide luminance range of 1000–10 000 cd m−2.

A novel tetraphenylsilane–phenanthroimidazole hybrid host material for highly efficient blue fluorescent, green and red phosphorescent OLEDs

2015 ◽  
Vol 3 (17) ◽  
pp. 4394-4401 ◽  
Author(s):  
Dong Liu ◽  
Mingxu Du ◽  
Dong Chen ◽  
Kaiqi Ye ◽  
Zuolun Zhang ◽  
...  
Keyword(s):  
High Performance ◽  
Carrier Transport ◽  
Host Material ◽  
Highly Efficient ◽  
Red Oleds

A novel organosilane compound Si(PPI)2 with good carrier-transport ability has been used as an efficient host for high-performance fluorescent pure-blue and phosphorescent green/red OLEDs.

Highly efficient green and red OLEDs based on a new exciplex system with simple structures

2017 ◽  
Vol 43 ◽  
pp. 136-141 ◽  
Author(s):  
Juewen Zhao ◽  
Xiaoyang Du ◽  
Shaolin Yuan ◽  
Caijun Zheng ◽  
Hui Lin ◽  
...  
Keyword(s):  
Highly Efficient ◽  
Red Oleds

Doubly Boron‐Doped TADF Emitters Decorated with ortho ‐Donor Groups for Highly Efficient Green to Red OLEDs

2020 ◽  
Vol 26 (70) ◽  
pp. 16793-16801
Author(s):  
Ajay Kumar ◽  
Han Young Shin ◽  
Taehwan Lee ◽  
Jaehoon Jung ◽  
Byung Jun Jung ◽  
...  
Keyword(s):  
Highly Efficient ◽  
Boron Doped ◽  
Red Oleds

scholarly journals Towards Highly Efficient TADF Yellow-Red OLEDs Fabricated by Solution Deposition Methods: Critical Influence of the Active Layer Morphology

Nanomaterials ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 101 ◽  
Author(s):  
Manish Kumar ◽  
Luiz Pereira
Keyword(s):  
Active Layer ◽  
Power Efficiency ◽  
Transport Layer ◽  
Electron Transport Layer ◽  
Organic Layer ◽  
Solution Processing ◽  
Host Matrix ◽  
Highly Efficient ◽  
Red Oleds ◽  
P Type

Organic light-emitting diodes (OLEDs) based on thermally activated delayed fluorescence emitters (TADF) in simple device structures fabricated by solution processing are strongly dependent on a suitable host molecular conformation and morphology. Herein, we report the fabrication of highly efficient yellow-red TADF-based OLEDs via solution processing in a simple, two-organic-layer device structure. The devices were fabricated at different weight concentrations of 5%, 8%, and 10% emitter in an n-/p-type mixed host matrix, and their characteristics were studied. The device performance was compared with different thickness parameters for both the emitting layer (EML) and the electron transport layer (ETL) in various solvents, including chlorobenzene, dichlorobenzene, and chloroform. By optimizing the mixed ratio of EML, yellow-red OLEDs of 2-[4 (diphenylamino)phenyl]-10,10-dioxide-9H-thioxanthen-9-one (TXO-TPA) emitter in an n-/p-type host matrix of poly(N-vinylcarbazole):1,3-Bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazo-5-yl]benzene (PVK:OXD-7) as a blend for the active layer were fabricated. In the best results, the device exhibited a lower turn-on voltage at around 6 V, with an external quantum efficiency (EQE) of 18.44%, current efficiency of 36.71 cd/A, and power efficiency of 14.74 Lm/W for the 8% emitter concentration. The importance of solvent for improving the electrical properties, together with organic layer thickness and host effect for the charge carrier’s transport and device characteristics are also discussed.

A series of novel host materials based on the 10,11-dihydro-5H-dibenzo[b,f]azepine unit for highly efficient green and red organic light-emitting diodes

2021 ◽  
Author(s):  
Bangjin Sun ◽  
Kai-Ning Tong ◽  
Sheng-Nan Liu ◽  
Man-Keung Fung ◽  
Jian Fan
Keyword(s):  
Building Block ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light ◽  
Host Materials ◽  
Novel Host ◽  
Red Oleds

Highly efficient host materials for green and red OLEDs were developed via the incorporation of 10,11-dihydro-5H-dibenzo[b,f]azepine as a building block.

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