Sky-blue thermally activated delayed fluorescence material employing a diphenylethyne acceptor for organic light-emitting diodes. Issue 1 (7th December 2017)

• Record Type: Journal Article
• Authors: He, Zuozheng; Cai, Xinyi; Wang, Zhiheng; Li, Yunchuan; Xu, Zhida; Liu, Kunkun; Chen, Dongcheng; Su, Shi-Jian
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 1(2017)
• Page Start: 36
• Page End: 42
• Publication Date: 2017-12-07
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c7tc02763j
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : The first blue thermally activated delayed fluorescence molecule containing diphenylethyne as the acceptor, 1, 2-bis(4-(10 H -phenoxazin-10-yl)phenyl)ethyne, is reported. Abstract : The strong electronegativity of sp-hybridized carbons, contributed by their large s character (50%), inspired the development of diphenylethyne as an electron acceptor to construct a sky-blue thermally activated delayed fluorescence material, 1, 2-bis(4-(10 H -phenoxazin-10-yl)phenyl)ethyne (DPE-DPXZ), using 10 H -phenoxazine (PXZ) as an electron donor fragment. A sky-blue organic light-emitting diode employing DPE-DPXZ as the emitter demonstrated an external quantum efficiency exceeding 10%. Furthermore, another alkyne derivative, 1, 2-bis(4-(9, 9-dimethylacridin-10(9 H )-yl)phenyl)ethyne (DPE-DDMAc), in combination with 9, 9-dimethyl-9, 10-dihydroacridine (DMAc) as the donor was also studied to explore the singlet–triplet splitting energy governed by donor–acceptor alternation.