title: Systematic control of photophysical properties of host materials for high quantum efficiency above 25% in green thermally activated delayed fluorescent devices.
abstract: Three donor-acceptor type host materials with different photophysical properties were developed by managing the interconnect position of the donor and acceptor moieties and molecular structure of the host materials was correlated with the electro-optical properties and device performances of the host materials. The linkage via the meta-position of aromatic units was better than the linkage via ortho- or para-positions and high quantum efficiency of 26.0% in the green thermally activated delayed fluorescent device was achieved using the host material with the meta-linkage.
authors.affiliation: Department of Polymer Science and Engineering Dankook University , Jukjeon-dong, Suji-gu, Yongin-si, Gyeonggi-do 448-701, Republic of Korea.
authors.forename: Chil Won
authors.initials: CW
authors.lastname: Lee
authors.forename: Jun Yeob
authors.initials: JY
authors.lastname: Lee
keywords: carbazole; dicyanobenzene; donor−acceptor type host; green fluorescent device; high quantum efficiency; thermally activated delayed fluorescence