Non-doped and doped circularly polarized organic light-emitting diodes with high performances based on chiral octahydro-binaphthyl delayed fluorescent luminophores

2019 ◽  
Vol 7 (23) ◽  
pp. 7045-7052 ◽  
Author(s):  
Zheng-Guang Wu ◽  
Zhi-Ping Yan ◽  
Xu-Feng Luo ◽  
Li Yuan ◽  
Wei-Qiu Liang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Circularly Polarized ◽  
Organic Light ◽  
Fluorescent Materials ◽  
Low Efficiency

Two circularly polarized delayed fluorescent materials were applied in non-doped and doped CP-OLEDs with |gEL| up to 2.9 × 10−3, an EQEmax of 12.4% and a low efficiency roll-off.

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)...

Configurationally stable helical tetradentate Pt(II) complexes for organic light-emitting diodes with circularly polarized electroluminescence

2021 ◽  
Author(s):  
Li Yuan ◽  
Ting-Ting Liu ◽  
Meng-Xi Mao ◽  
Xu-Feng Luo ◽  
You-Xuan Zheng
Keyword(s):  
Steric Hindrance ◽  
Light Emitting Diodes ◽  
Helical Structure ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Circularly Polarized ◽  
Organic Light

In this study, three pairs of tetradentate Pt(II) enantiomers with helical structure are reported. By changing a six-membered to five-membered metallocycle and replacing quinoline by benzo[h]quinoline with greater steric hindrance,...

Highly efficient bluish green organic light-emitting diodes of iridium(iii) complexes with low efficiency roll-off

2018 ◽  
Vol 47 (22) ◽  
pp. 7587-7593 ◽  
Author(s):  
Ning Su ◽  
Zheng-Guang Wu ◽  
You-Xuan Zheng
Keyword(s):  
Current Efficiency ◽  
External Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
High Current ◽  
High Current Efficiency ◽  
Light Emitting ◽  
Organic Light ◽  
Bluish Green ◽  
Low Efficiency

Two efficient bluish green iridium(iii) complexes were applied as emitters in the organic light-emitting diodes, which showing high current efficiency of 58.17 cd A−1 and external quantum efficiency of 25.33% with low efficiency roll-off.

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