Stable pure‐blue emission of poly(9,9‐dioctylfluorene) via suppression of the green emission

ABSTRACT 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 th...

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Bibliographic Details
Published in:Journal of applied polymer science 2017-06, Vol.134 (24), p.np-n/a
Main Authors: Chen, Yuehua, You, Xuemeng, Zhang, Xinwen, Zhang, Xiaolin, Liu, Bin, Lai, Wenyong, Huang, Wei
Format: Article
Language:English
Subjects:
Aggregates
Annealing
Devices
Electroluminescence
Emission
green emission band
Materials science
poly(9,9‐dioctylfluorene)
Polymers
pure‐blue emission
Spectra
Spectral emissivity
Strategy
suppression
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Summary:ABSTRACT 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.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.44950