Efficient full-colour organic light-emitting diodes based on donor-acceptor electroluminescent materials with a reduced singlet-triplet splitting energy gap.

ABSTRACT: A series of efficient blue-emitting materials, namely, Cz-DPVI, Cz-DMPVI, Cz-DEPVI and TPA-DEPVI, possessing a donor-acceptor architecture with dual carrier transport properties and small singlet-triplet splitting is reported. These compounds exhibit excellent thermal properties with a very high glass-transition temperature (T _g), and thus, a stable uniform thin film was formed during device fabrication. Among the weak donor compounds, specifically, Cz-DPVI, Cz-DMPVI and Cz-DEPVI, the Cz-DEPVI-based device showed the maximum efficiencies (L: 13 955 cd m^-2, η _ex: 4.90%, η _c: 6.0 cd A^-1, and η _p: 5.4 lm W^-1) with CIE coordinates of (0.15, 0.06) at 2.8 V. The electroluminescent effi

SUBMITTER: Jayabharathi J 

PROVIDER: S-EPMC9060244 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature