High performance red organic electroluminescent devices based on a trivalent iridium complex with stepwise energy levels

RSC Advances ◽  
2016 ◽  
Vol 6 (75) ◽  
pp. 71282-71286 ◽  
Author(s):  
Yanan Li ◽  
Liang Zhou ◽  
Rongzhen Cui ◽  
Yunlong Jiang ◽  
Xuesen Zhao ◽  
...  
Keyword(s):  
Current Efficiency ◽  
External Quantum Efficiency ◽  
Power Efficiency ◽  
High Performance ◽  
Energy Levels ◽  
Iridium Complex ◽  
High Brightness ◽  
Electroluminescent Devices ◽  
Maximum Current ◽  
Organic Electroluminescent

Red EL device with maximum current efficiency of 44.76 cd A−1, power efficiency of 40.19 lm W−1, and external quantum efficiency (EQE) of 15.5% was realized. At high brightness of 1000 cd m−2, current efficiency as high as 40.59 cd A−1 (EQE = 14.4%) can be retained.

Green organic light-emitting devices with external quantum efficiency up to nearly 30% based on an iridium complex with a tetraphenylimidodiphosphinate ligand

RSC Advances ◽  
2016 ◽  
Vol 6 (68) ◽  
pp. 63200-63205 ◽  
Author(s):  
Yanan Li ◽  
Liang Zhou ◽  
Yunlong Jiang ◽  
Rongzhen Cui ◽  
Xuesen Zhao ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Power Efficiency ◽  
High Performance ◽  
Iridium Complex ◽  
Maximum Brightness ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light

High performance green electroluminescent device with maximum brightness, current efficiency, power efficiency and external quantum efficiency (EQE) up to 113 610 cd m−2, 112.30 cd A−1, 97.95 lm W−1 and 29.4%, was realized.

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.

scholarly journals Efficient green electroluminescence based on an iridium(iii) complex with different device structures

RSC Advances ◽  
2017 ◽  
Vol 7 (5) ◽  
pp. 2615-2620 ◽  
Author(s):  
Yi-Ming Jing ◽  
You-Xuan Zheng ◽  
Jing-Lin Zuo
Keyword(s):  
Current Efficiency ◽  
Power Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Iridium Complex ◽  
Device Structure ◽  
Light Emitting ◽  
Organic Light ◽  
Device Structures ◽  
Maximum Current

Organic light-emitting diodes based on an iridium complex using different device structure show high performances with a maximum current efficiency of 86.5 cd A−1and a maximum power efficiency of 52.2 lm W−1, respectively.

High performance red phosphorescent organic electroluminescent devices with characteristic mechanisms by utilizing terbium or gadolinium complexes as sensitizers

2017 ◽  
Vol 5 (8) ◽  
pp. 2066-2073 ◽  
Author(s):  
Rongzhen Cui ◽  
Weiqiang Liu ◽  
Liang Zhou ◽  
Xuesen Zhao ◽  
Yunlong Jiang ◽  
...  
Keyword(s):  
High Performance ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Color Purity ◽  
Electroluminescent Devices ◽  
Light Emitting ◽  
Organic Light ◽  
Gadolinium Complexes ◽  
Organic Electroluminescent ◽  
High Color Purity

High performance sensitized organic light-emitting diodes with high color purity were obtained by utilizing terbium or gadolinium complexes as sensitizers.

High-performance fluorescent organic electroluminescent devices benefit from sensitization of thermally activated delayed fluorescence

2021 ◽  
Author(s):  
Rongzhen Cui ◽  
Liang Zhou ◽  
Weisong Sun ◽  
Wenxing Liu ◽  
Jiahai Wang
Keyword(s):  
High Performance ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Electroluminescent Devices ◽  
Fluorescent Material ◽  
Thermally Activated ◽  
Organic Electroluminescent

Efficient fluorescent electroluminescent devices were achieved by exploiting a thermally activated fluorescent material (3,5-bis(3,6-di-tert-butyl-9H-carbazol-9-yl)phenyl)(pyridin-4-yl)methanone (DTCBPy) as a sensitizer.

Efficient electroluminescence of bluish green iridium complexes with 2-(3,5-bis(trifluoromethyl)phenyl)pyrimidine and 2-(3,5-bis(trifluoromethyl)phenyl)-5-fluoropyrimidine as the main ligands

2018 ◽  
Vol 5 (7) ◽  
pp. 1545-1552 ◽  
Author(s):  
Hua-Bo Han ◽  
Zheng-Guang Wu ◽  
You-Xuan Zheng
Keyword(s):  
Current Efficiency ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Iridium Complexes ◽  
Bluish Green ◽  
Maximum Current

Four bluish green iridium complexes with high photoluminescence quantum efficiencies were applied in OLEDs, and they showed a maximum current efficiency of 74.70 cd A−1 and a maximum external quantum efficiency of 35.0% with mild efficiency roll-off.

Efficient bluish green electroluminescence of iridium complexes with good electron mobility

2018 ◽  
Vol 42 (16) ◽  
pp. 13351-13357 ◽  
Author(s):  
Hua-Bo Han ◽  
Zheng-Guang Wu ◽  
You-Xuan Zheng
Keyword(s):  
Current Efficiency ◽  
Quantum Efficiency ◽  
Electron Mobility ◽  
External Quantum Efficiency ◽  
Iridium Complexes ◽  
Bluish Green ◽  
Maximum Current

Two efficient bluish green iridium complexes with good electron mobility were applied in efficient OLEDs, showing a maximum current efficiency of 71.18 cd A−1 and a maximum external quantum efficiency of 27.7%.

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