N−H-Type Excited-State Proton Transfer in Compounds Possessing a Seven-Membered-Ring Intramolecular Hydrogen Bond

2016 ◽  
Vol 22 (41) ◽  
pp. 14688-14695 ◽  
Author(s):  
Yi-An Chen ◽  
Fan-Yi Meng ◽  
Yen-Hao Hsu ◽  
Cheng-Hsien Hung ◽  
Chi-Lin Chen ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Excited State ◽  
Proton Transfer ◽  
Intramolecular Hydrogen Bond ◽  
Membered Ring ◽  
Excited State Proton Transfer ◽  
Intramolecular Hydrogen

Intramolecular hydrogen bond – enhanced electroluminescence performance of hybridized local and charge transfer (HLCT) excited-state blue-emissive materials

2021 ◽  
Author(s):  
Wan Li ◽  
Pongsakorn Chasing ◽  
Wachara Benchaphanthawee ◽  
Phattananawee Nalaoh ◽  
Thanyarat Chawanpunyawat ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Excited State ◽  
Charge Transfer ◽  
Intramolecular Hydrogen Bond ◽  
Utilization Efficiency ◽  
High Brightness ◽  
Singlet Exciton ◽  
High Maximum ◽  
Intramolecular Hydrogen

OLED devices based on o-hydroxyphenyl phenanthroimidazole (HPI) emitters showed a high maximum external quantum effciency of 8.13% with high brightness of 18 100 cd m−2 and a maximum singlet exciton utilization efficiency of as high as 94%.

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