Imidazolyl‐phenylcarbazole‐based Host Materials and Their Use for Co‐host Designs in Phosphorescent OLEDs

2021 ◽  
Author(s):  
Rong-Huei Yi ◽  
Ya-Chun Lei ◽  
Yeh-Hsiang Tseng ◽  
Yi-Fan Lin ◽  
Yen-Chia Cheng ◽  
...  
Keyword(s):  
Host Materials

scholarly journals Pyridinyl-Carbazole Fragments Containing Host Materials for Efficient Green and Blue Phosphorescent OLEDs

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4615
Author(s):  
Dovydas Blazevicius ◽  
Daiva Tavgeniene ◽  
Simona Sutkuviene ◽  
Ernestas Zaleckas ◽  
Ming-Ruei Jiang ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Power Efficiency ◽  
Triplet Energy ◽  
New Host ◽  
High Brightness ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Host Materials

Pyridinyl-carbazole fragments containing low molar mass compounds as host derivatives H1 and H2 were synthesized, investigated, and used for the preparation of electro-phosphorescent organic light-emitting devices (PhOLEDs). The materials demonstrated high stability against thermal decomposition with the decomposition temperatures of 361–386 °C and were suitable for the preparation of thin amorphous and homogeneous layers with very high values of glass transition temperatures of 127–139 °C. It was determined that triplet energy values of the derivatives are, correspondingly, 2.82 eV for the derivative H1 and 2.81 eV for the host H2. The new derivatives were tested as hosts of emitting layers in blue, as well as in green phosphorescent OLEDs. The blue device with 15 wt.% of the iridium(III)[bis(4,6-difluorophenyl)-pyridinato-N,C2′]picolinate (FIrpic) emitter doping ratio in host material H2 exhibited the best overall characteristics with a power efficiency of 24.9 lm/W, a current efficiency of 23.9 cd/A, and high value of 10.3% of external quantum efficiency at 100 cd/m2. The most efficient green PhOLED with 10 wt% of Ir(ppy)3 {tris(2-phenylpyridine)iridium(III)} in the H2 host showed a power efficiency of 34.1 lm/W, current efficiency of 33.9 cd/A, and a high value of 9.4% for external quantum efficiency at a high brightness of 1000 cd/m2, which is required for lighting applications. These characteristics were obtained in non-optimized PhOLEDs under an ordinary laboratory atmosphere and could be improved in the optimization process. The results demonstrate that some of the new host materials are very promising components for the development of efficient phosphorescent devices.

Catalytic Hexadecachlorophthalocyanine Cobalt-Coated Host Materials for Li–S Batteries

2021 ◽  
Author(s):  
Zhenpu Shi ◽  
Kexin Zhang ◽  
Kai Xiao ◽  
Xingxing Xing ◽  
Huifang Xu ◽  
...  
Keyword(s):  
Host Materials

scholarly journals Excimer Formation by Steric Twisting in Carbazole and Triphenylamine-Based Host Materials

2015 ◽  
Vol 119 (5) ◽  
pp. 2380-2387 ◽  
Author(s):  
Sergey A. Bagnich ◽  
Stavros Athanasopoulos ◽  
Alexander Rudnick ◽  
Pamela Schroegel ◽  
Irene Bauer ◽  
...  
Keyword(s):  
Host Materials ◽  
Excimer Formation

ortho-, meta-, andpara-Dihydroindenofluorene Derivatives as Host Materials for Phosphorescent OLEDs

2014 ◽  
Vol 127 (4) ◽  
pp. 1192-1196 ◽  
Author(s):  
Maxime Romain ◽  
Sébastien Thiery ◽  
Anna Shirinskaya ◽  
Céline Declairieux ◽  
Denis Tondelier ◽  
...  
Keyword(s):  
Host Materials

Morphological Stable Spirobifluorene/Oxadiazole Hybrids as Bipolar Host Materials for Efficient Green and Red Electrophosphorescence

2010 ◽  
Vol 5 (2) ◽  
pp. 278-284 ◽  
Author(s):  
Youtian Tao ◽  
Liang Ao ◽  
Qiang Wang ◽  
Cheng Zhong ◽  
Chuluo Yang ◽  
...  
Keyword(s):  
Host Materials

Hierarchical Ba2(B5O9)Cl·(H2O)0.5 microspheres: surfactant-assisted facile hydrothermal synthesis, Tb3+ doping and photoluminescence properties

CrystEngComm ◽  
2015 ◽  
Vol 17 (41) ◽  
pp. 7856-7865 ◽  
Author(s):  
Xiuping Chen ◽  
Linlin Zhang ◽  
Zhaoqiang Zhang ◽  
Lin Zhu ◽  
Wancheng Zhu
Keyword(s):  
Hydrothermal Synthesis ◽  
Hydrothermal Process ◽  
Photoluminescence Properties ◽  
Host Materials ◽  
Surfactant Assisted

Uniform hierarchical Ba2(B5O9)Cl·(H2O)0.5 microspheres containing nanorod-like sub-units were synthesized via a mild EDTA-2Na assisted hydrothermal process, which were manifested as great potential green-emitting host materials via Tb3+ doping.

scholarly journals Density of States of OLED Host Materials from Thermally Stimulated Luminescence

2021 ◽  
Vol 15 (4) ◽  
Author(s):  
Andrei Stankevych ◽  
Alexander Vakhnin ◽  
Denis Andrienko ◽  
Leanne Paterson ◽  
Jan Genoe ◽  
...  
Keyword(s):  
Density Of States ◽  
Thermally Stimulated Luminescence ◽  
Host Materials
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