Protecting Benzylic CH Bonds by Deuteration Doubles the Operational Lifetime of Deep‐Blue Ir‐Phenylimidazole Dopants in Phosphorescent OLEDs (Advanced Optical Materials 16/2021). Issue 16 (18th August 2021)

• Record Type: Journal Article
• Authors: Bae, Hye Jin; Kim, Jong Soo; Yakubovich, Alexander; Jeong, Jinhoon; Park, Sangho; Chwae, Jun; Ishibe, Satoko; Jung, Yongsik; Rai, Virendra Kumar; Son, Won‐Joon; Kim, Sunghan; Choi, Hyeonho; Baik, Mu‐Hyun
• Is Part Of: Advanced optical materials. Volume 9:Issue 16(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-08-18
• Subjects: blue OLEDs -- DFT calculations -- homoleptic Ir(III) complex -- kinetic isotope effect -- operational lifetime; Optical materials -- Periodicals; Photonics -- Periodicals; 620.11295
• DOI: 10.1002/adom.202170059
• Languages: English
• ISSNs: 2195-1071

Abstract

Abstract : 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.