Carrier Transport Dependence on Phosphorescent Materials in Polymer Based OLEDs

2012 ◽  
Vol 1402 ◽  
Author(s):  
Genichi Motomura ◽  
Mitsunori Suzuki ◽  
Takahisa Shimizu ◽  
Hideo Fujikake
Keyword(s):  
Transport Properties ◽  
Carrier Transport ◽  
Energy Levels ◽  
Organic Light Emitting Diodes ◽  
Iridium Complexes ◽  
Dispersive Transport ◽  
Light Emitting ◽  
Organic Light ◽  
Electron Transport Properties ◽  
Carrier Transport Properties

ABSTRACTThe carrier transport properties in the emissive layer of phosphorescent polymer organic light-emitting diodes (OLEDs) were observed by time-of-flight (TOF) mobility measurements. The hole and electron mobilities in carrier transport polymer without iridium complexes were measured with high levels, 3 × 10-4 cm2/Vs (hole) and 1 × 10-3 cm2/Vs (electron), of non-dispersive transport. The hole and/or electron transport properties were degraded when the iridium complexes were included in the phosphorescent polymers. The complexes acted as a trap in the phosphorescent polymers when the energy levels of the iridium complexes were lower than that of the carrier transport polymer.

Design principles of carbazole/dibenzothiophene derivatives as host material in modern efficient organic light-emitting diodes

2017 ◽  
Vol 5 (28) ◽  
pp. 6989-6996 ◽  
Author(s):  
Junming Li ◽  
Shou-Cheng Dong ◽  
Andreas Opitz ◽  
Liang-Sheng Liao ◽  
Norbert Koch
Keyword(s):  
Carrier Transport ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Photophysical Properties ◽  
Energy Levels ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Host Materials

Host materials for modern high-efficiency organic light-emitting diodes (OLEDs) based on phosphorescence and thermally activated delayed fluorescence were optimized with respect to thermal stability, photophysical properties, energy levels, and charge carrier transport.

Development of efficient solution-processed red phosphorescent organic light-emitting diodes using carrier transport materials

2010 ◽  
Vol 160 (15-16) ◽  
pp. 1623-1626 ◽  
Author(s):  
Myungkwan Song ◽  
Jin Su Park ◽  
Chul-Hyun Kim ◽  
Jang Soo Kim ◽  
Yeong-Soon Gal ◽  
...  
Keyword(s):  
Carrier Transport ◽  
Efficient Solution ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Solution Processed ◽  
Light Emitting ◽  
Organic Light

Utilization of double-sensitized structure toward achieving high performance green and red phosphorescent organic light-emitting diodes

2021 ◽  
Author(s):  
Shuaibing Li ◽  
Ruixia Wu ◽  
Kai Chen ◽  
Weidong Sun ◽  
Zhenzhen Li ◽  
...  
Keyword(s):  
Electron Transport ◽  
High Performance ◽  
Light Emitting Diodes ◽  
Energy Levels ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Tert Butyl ◽  
Organic Light

In this work, iridium(III)bis(4-(tert-butyl)-2,6-diuoro-2,3-bipyridinne)acetylacetonate (FK306) was utilized as sensitizer and incorporated into both light-emitting and electron transport layers to compose double-sensitized system because of its low-lying energy levels and well...

Highly Efficient Phosphorescent Organic Light-Emitting Diodes Based on Novel Bipolar Iridium Complexes with Easily-Tuned Emission Colors by Adjusting Fluorine Substitution on Phenylpyridine Ligands

2021 ◽  
Author(s):  
Shuonan Chen ◽  
Xi Gai ◽  
Jie Liang ◽  
Kaiqi Ye ◽  
Yu Liu ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Iridium Complexes ◽  
Fluorine Substitution ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light

Two new phenylpyridine derivatives-based heteroleptic iridium complexes, (Fppy)2Ir(dipg) (Fppdg) and (CF3ppy)2Ir(dipg) (tFmppdg) with emission peaks of 545 nm and 581 nm respectively, were designed and synthesized by incorporation of a...

Sky-blue-emitting cationic iridium complexes with carbazole-type counter-anions and their use for efficient solution-processed organic light-emitting diodes

2020 ◽  
Vol 49 (26) ◽  
pp. 8967-8975
Author(s):  
Renyou Yu ◽  
Pei Wang ◽  
Xianwen Meng ◽  
Lei He
Keyword(s):  
Efficient Solution ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Iridium Complexes ◽  
Solution Processed ◽  
Light Emitting ◽  
Organic Light

Cationic iridium complexes with carbazole-type counter-anions show enhanced performances compared to those with PF6− counter-anions in OLEDs.

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