Key host parameters for long lifetimes in phosphorescent organic light-emitting diodes: bond dissociation energy in triplet excited state. Issue 5 (2nd January 2020)

• Record Type: Journal Article
• Authors: Yang, Chang Yoon; Kang, Sunwoo; Jeong, Hyein; Jang, Ho Jin; Lee, Yoonkyoo; Lee, Jun Yeob
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 5(2020)
• Page Start: 1697
• Page End: 1703
• Publication Date: 2020-01-02
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9tc05585a
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Key parameters of the host for long lifetimes in phosphorescent organic light-emitting diodes were investigated by synthesizing three isomeric hosts with a carbazolylcarbazole hole transport moiety and a benzonitrile electron transport moiety. Abstract : Key parameters of the host for long lifetimes in phosphorescent organic light-emitting diodes were investigated by synthesizing three isomeric hosts with a carbazolylcarbazole hole transport moiety and a benzonitrile electron transport moiety. The position of the CN unit was controlled as the ortho, meta and para position to the carbazolylcarbazole to study the relationship between material parameters and lifetime of the phosphorescent organic light-emitting diodes. It was revealed that the bond dissociation energy in the triplet excited state is well-correlated with the device lifetime of the phosphorescent organic light-emitting diodes.