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Protecting Benzylic CH Bonds by Deuteration Doubles the Operational Lifetime of Deep‐Blue Ir‐Phenylimidazole Dopants in Phosphorescent OLEDs (Advanced Optical Materials 16/2021)
Author(s) -
Bae Hye Jin,
Kim Jong Soo,
Yakubovich Alexander,
Jeong Jinhoon,
Park Sangho,
Chwae Jun,
Ishibe Satoko,
Jung Yongsik,
Rai Virendra Kumar,
Son WonJoon,
Kim Sunghan,
Choi Hyeonho,
Baik MuHyun
Publication year - 2021
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.202170059
Subject(s) - phosphorescence , dopant , oled , materials science , kinetic isotope effect , deuterium , photochemistry , persistent luminescence , luminescence , optoelectronics , nanotechnology , chemistry , doping , fluorescence , atomic physics , optics , physics , thermoluminescence , layer (electronics)
The kinetic isotope effect (KIE) can be used to improve the operational lifetime by stabilizing a series of blue Ir‐dopants in phosphorescent OLED devices (see article number 2100630 by Hye Jin Bae and co‐workers). Deuterating the vulnerable benzylic C–H bonds, which are proposed to participate in the degradative reaction, allows for taking advantage of the innately slower C–D cleavage reaction rate to protect the Ir‐dopants. The deuterium incorporation targeting the most vulnerable C–H bonds is a viable strategy to significantly increase the operational lifetime.