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White Electroluminescence with Simultaneous Three‐Color Emission from a Four‐Armed Star‐Shaped Single‐Polymer System
Author(s) -
Jiu Yuanda,
Wang Jianyun,
Liu Chengfang,
Lai Wenyong,
Zhao Lingling,
Li Xiangchun,
Jiang Yi,
Xu Weidong,
Zhang Xinwen,
Huang Wei
Publication year - 2015
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201500308
Subject(s) - polyfluorene , electroluminescence , chemistry , dopant , luminous efficacy , doping , pedot:pss , polymer , photochemistry , optoelectronics , analytical chemistry (journal) , layer (electronics) , materials science , organic chemistry
A four‐armed star‐shaped single‐polymer system with 4,7‐bis(5‐(4‐(9 H ‐carbazol‐9‐yl)phenyl)‐4‐hexylthiophen‐2‐yl)benzo[ c ][1,2,5]thiadiazole (FTBT) as a red emissive core, polyfluorene (PF) as blue emissive arms and 1,3‐benzo thiadiazole (BT) as green emissive dopants was designed and synthesized, in which red, green, and blue (RGB) emission balance can be achieved by adjusting the doping concentration of FTBT and BT discreetly. A typical single‐emissive‐layer device (ITO/PEDOT:PSS/polymer/TPBI/LiF/Al) was studied and discussed, realizing a pure and stable white emission with a luminous efficiency (LE) of 1.59 cd·A −1 and CIE coordinates of (0.31, 0.34). The high‐color‐quality white electroluminescence of the devices could be mainly attributed to the suppressed intermolecular interactions, and partial energy transfer from the blue PF arms to the red and green dopants.