Bipolar phenanthroimidazole–diazacarbazole hybrids with appropriate bandgaps for highly efficient and low roll-off red, green and blue electroluminescent devices

2016 ◽  
Vol 4 (36) ◽  
pp. 8473-8482 ◽  
Author(s):  
Bo Wang ◽  
Xialei Lv ◽  
Jianghong Tan ◽  
Qing Zhang ◽  
Zhi Huang ◽  
...  
Keyword(s):  
Electroluminescent Devices ◽  
Primary Color ◽  
Highly Efficient ◽  
Low Efficiency ◽  
Bipolar Charge

Highly efficient three-primary color (R, G and B) OLEDs with low efficiency roll-off were realized by two structurally simple phenanthroimidazole–diazacarbazole hybrids with appropriate bandgap and bipolar charge-transporting properties.

New multifunctional phenanthroimidazole–phosphine oxide hybrids for high-performance red, green and blue electroluminescent devices

2014 ◽  
Vol 2 (33) ◽  
pp. 6817-6826 ◽  
Author(s):  
Kai Wang ◽  
Shipan Wang ◽  
Jinbei Wei ◽  
Shanyong Chen ◽  
Dong Liu ◽  
...  
Keyword(s):  
Phosphine Oxide ◽  
High Performance ◽  
Diphenylphosphine Oxide ◽  
Electroluminescent Devices ◽  
Highly Efficient ◽  
Deep Blue ◽  
Fluorescent Materials ◽  
Bipolar Charge

Two novel fluorescent materials containing phenanthroimidazole/diphenylphosphine oxide possessing bipolar charge-transporting property have been used not only as emitters to fabricate high-performance deep-blue OLEDs, but also as hosts to fabricate highly efficient green and red PhOLEDs.

Efficient organic light-emitting diodes based on iridium(III) complexes containing indolo[3,2,1-jk]carbazole derivatives with narrow emission bandwidths and low efficiency roll offs

2021 ◽  
Author(s):  
Xiang-Ji Liao ◽  
Jin-Jun Zhu ◽  
Li Yuan ◽  
Zhi-Ping Yan ◽  
Xu-Feng Luo ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Carbazole Derivatives ◽  
Highly Efficient ◽  
Organic Light ◽  
Low Efficiency ◽  
Narrow Emission

In this work, two cyclometalated ligands 2-(pyridin-2-yl)indolo[3,2,1-jk]carbazole (pyidcz) and 2-(4-(trifluoromethyl)pyridin-2-yl)indolo[3,2,1-jk]carbazole (tfpyidcz) using indolo[3,2,1-jk]carbazole unit were synthesized for highly efficient iridium(III) complexes (pyidcz)2Ir(tmd) and (tfpyidcz)2Ir(tmd) (tmd = 2,2,6,6-tetramethyl-3,5-heptanedione). The two Ir(III)...

Highly efficient orange-red electroluminescence of iridium complexes with good electron mobility

2017 ◽  
Vol 5 (32) ◽  
pp. 8150-8159 ◽  
Author(s):  
Hua-Bo Han ◽  
Rong-Zhen Cui ◽  
Yi-Ming Jing ◽  
Guang-Zhao Lu ◽  
You-Xuan Zheng ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Electron Mobility ◽  
Quantum Yields ◽  
Iridium Complexes ◽  
Maximum Luminance ◽  
High Quantum ◽  
Highly Efficient ◽  
Maximum Current ◽  
Low Efficiency

Two orange-red iridium complexes with high quantum yields and good electron mobility were applied in efficient OLEDs showing a maximum luminance of 129 466 cd m−2, a maximum current efficiency of 62.96 cd A−1 with low efficiency roll-off.

ChemInform Abstract: New 1H-Pyrazolo[3,4-b]quinoxaline Derivatives as Sharp Green-Emitting Dopants for Highly Efficient Electroluminescent Devices.

ChemInform ◽  
2010 ◽  
Vol 33 (43) ◽  
pp. no-no
Author(s):  
Pengfei Wang ◽  
Zhiyuan Xie ◽  
Oiyan Wong ◽  
Chun-Sing Lee ◽  
Ningbew Wong ◽  
...  
Keyword(s):  
Electroluminescent Devices ◽  
Highly Efficient ◽  
Quinoxaline Derivatives

Highly efficient all solution-processed non-doped deep-blue electroluminescent devices from oligocarbazole-end-capped spirobifluorenes

2020 ◽  
Vol 4 (10) ◽  
pp. 2943-2953 ◽  
Author(s):  
Pattarawadee Therdkatanyuphong ◽  
Chokchai Kaiyasuan ◽  
Pongsakorn Chasing ◽  
Terdkait Kaewpuang ◽  
Thanyarat Chawanpunyawat ◽  
...  
Keyword(s):  
Solution Processed ◽  
Electroluminescent Devices ◽  
Highly Efficient ◽  
Deep Blue

Oligocarbazole end-capped spirobifluorenes as non-doped deep-blue emissive layers in all solution-processed OLEDs exhibit one of the best all solution-processed deep-blue OLEDs reported to date.

scholarly journals Highly Efficient and Low-Temperature Preparation of Plate-Like ZrB2-SiC Powders by a Molten-Salt and Microwave-Modified Boro/Carbothermal Reduction Method

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1811 ◽  
Author(s):  
Yuan Zeng ◽  
Feng Liang ◽  
Jianghao Liu ◽  
Jun Zhang ◽  
Haijun Zhang ◽  
...  
Keyword(s):  
Molten Salt ◽  
Carbothermal Reduction ◽  
Reduction Method ◽  
Low Cost ◽  
Highly Efficient ◽  
Carbothermal Reduction Method ◽  
Low Temperature Preparation ◽  
Phase Pure ◽  
Low Efficiency ◽  
Reduced Temperature

To address the various shortcomings of a high material cost, energy-intensive temperature conditions and ultra-low efficiency of the conventional boro/carbothermal reduction method for the industrial preparation of ZrB2-SiC powders, a novel molten-salt and microwave-modified boro/carbothermal reduction method (MSM-BCTR) was developed to synthesize ZrB2-SiC powders. As a result, phase pure ZrB2-SiC powders can be obtained by firing low-cost zircon (ZrSiO4), amorphous carbon (C), and boron carbide (B4C) at a reduced temperature of 1200 °C for only 20 min. Such processing conditions are remarkably milder than not only that required for conventional boro/carbothermal reduction method to prepare phase pure ZrB2 or ZrB2-SiC powders (firing temperature of above 1500 °C and dwelling time of at least several hours), but also that even with costly active metals (e.g., Mg and Al). More importantly, the as-obtained ZrB2 particles had a single crystalline nature and well-defined plate-like morphology, which is believed to be favorable for enhancing the mechanical properties, especially toughness of their bulk counterpart. The achievement of a highly-efficient preparation of such high-quality ZrB2-SiC powders at a reduced temperature should be mainly attributed to the specific molten-salt and microwave-modified boro/carbothermal reduction method.

scholarly journals Highly efficient non-doped blue fluorescent OLEDs with low efficiency roll-off based on hybridized local and charge transfer excited state emitters

2020 ◽  
Vol 11 (19) ◽  
pp. 5058-5065 ◽  
Author(s):  
Xianhao Lv ◽  
Mizhen Sun ◽  
Lei Xu ◽  
Runzhe Wang ◽  
Huayi Zhou ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Highly Efficient ◽  
Low Efficiency

A new pure fluorescent blue HLCT-emitter was designed and synthesized. Highly efficient non-doped blue OLEDs with low efficiency roll-off were achieved.

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