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White Electroluminescence from Star‐like Single Polymer Systems: 2,1,3‐Benzothiadiazole Derivatives Dopant as Orange Cores and Polyfluorene Host as Six Blue Arms
Author(s) -
Chen Lei,
Li Pengcheng,
Cheng Yanxiang,
Xie Zhiyuan,
Wang Lixiang,
Jing Xiabin,
Wang Fosong
Publication year - 2011
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201100297
Subject(s) - polyfluorene , materials science , electroluminescence , dopant , optoelectronics , annealing (glass) , polymer , orange (colour) , oled , photochemistry , doping , optics , nanotechnology , layer (electronics) , composite material , chemistry , physics
By incorporating six blue emissive polyfluorene arms into star‐shaped orange emissive cores, two kinds of star‐like white electroluminescent single‐polymer systems are designed and synthesized. Energy transfer from the polyfluorene arms to the orange emissive cores is observed and a concentration quenching effect is effectively suppressed. Through thermal annealing, a highly efficient white emissive single‐layer device is achieved with CIE coordinates of (0.33, 0.35) and a current efficiency of 18.01 cd A −1 .