Wang Yang, Lu Yaoming, Gao Baoxiang, Wang Shumeng, Ding Junqiao, Wang Lixiang, Jing Xiabin, Wang Fosong
State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China.
College of Chemistry and Environmental Science, Hebei University, Baoding 071002, P. R. China.
Chem Commun (Camb). 2016 Sep 20;52(77):11508-11511. doi: 10.1039/c6cc05165k.
The single molecular tuning of charge balance has been demonstrated here by integrating a p-type dendron, an n-type dendron and a blue emissive Ir core into one dendritic platform. Compared with the commonly used physical blending, not only can the charge balance be well tailored, but also the intrinsic phase separation can be successfully eliminated in such developed single molecular systems (B-TCz2TPO1 and B-TCz1TPO2). As a consequence, their corresponding nondoped solution-processed PhOLEDs achieve more than doubled external quantum efficiencies accompanied by a negligible efficiency roll-off.
