Premium
Stable pure‐blue emission of poly(9,9‐dioctylfluorene) via suppression of the green emission
Author(s) -
Chen Yuehua,
You Xuemeng,
Zhang Xinwen,
Zhang Xiaolin,
Liu Bin,
Lai Wenyong,
Huang Wei
Publication year - 2017
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.44950
Subject(s) - electroluminescence , materials science , doping , spectral line , oxadiazole , green light , polymer , photochemistry , chemical engineering , polymer chemistry , optoelectronics , blue light , layer (electronics) , nanotechnology , chemistry , organic chemistry , composite material , physics , astronomy , engineering
Stable pure‐blue electroluminescence (EL) is obtained from polymer light‐emitting devices by dispersing poly(9,9‐dioctylfluorene) (PFO) into a wide band‐gap mixed‐matrix of poly(9‐vinylcarbazole) (PVK):2‐(4‐biphenylyl)‐5‐(4‐tert‐butylphenyl)‐1,3,4‐oxadiazole (PBD). From the EL spectra of the PFO‐doped films, we find that the additional green emission observed in the EL spectra of the pure PFO devices was significantly suppressed in the PFO‐doped devices. The spectral stability was also improved through evaluating the EL spectra of the PFO‐doped films annealed at different temperatures (from 80 to 150 °C). These results demonstrate that doping of PFO into a matrix to weaken the aggregate and oxidation of the PFO molecules is a simple strategy to suppress the green emission. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44950.