Synthesis and characterization of alternating copolymers derived from indeno[1,2-b]fluorene for blue light-emitting diodes

Three blue light‐emitting alternating copolymers derived from 6,6′,12,12′‐tetraoctylindeno[1,2‐b]fluorene (IF) and 4,4′‐diphenyl ether (DPE), N,N′‐di(4‐phenyl)aniline (TPA), or 3,6‐N‐octylcarbazole (CZO), named as PIF‐DPE, PIF‐TPA, and PIF‐CZO, respectively, were synthesized by Suzuki coupling react...

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Bibliographic Details
Published in:Journal of applied polymer science 2012-07, Vol.125 (2), p.1409-1417
Main Authors: Xia, Yangjun, Zhong, Chengmei, Li, Bin, Wu, Hongbin, Cao, Yong, Fan, Duowang
Format: Article
Language:English
Subjects:
2-b]fluorene
Applied sciences
Backbone
conjugated polymers
Copolymers
Devices
Electronics
Ethers
Exact sciences and technology
indeno
indeno[1,2‐b]fluorene
Intermediate frequency
light-emitting diodes
Materials science
Optoelectronic devices
Organic polymers
Physicochemistry of polymers
Polymers
Polymers with particular properties
Preparation, kinetics, thermodynamics, mechanism and catalysts
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
synthesis
Thermal properties
Thermogravimetric analysis
Voltammetry
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Summary:Three blue light‐emitting alternating copolymers derived from 6,6′,12,12′‐tetraoctylindeno[1,2‐b]fluorene (IF) and 4,4′‐diphenyl ether (DPE), N,N′‐di(4‐phenyl)aniline (TPA), or 3,6‐N‐octylcarbazole (CZO), named as PIF‐DPE, PIF‐TPA, and PIF‐CZO, respectively, were synthesized by Suzuki coupling reaction. The chemical structure, optoelectronic and thermal properties of the copolymers were characterized by 1H‐NMR, elemental analysis, gel permeation chromatography, cyclic voltammetry, thermogravimetric analysis, and differential scanning calorimetry. Photoluminescence peaks of the copolymers of PIF‐DPE, PIF‐TPA, and PIF‐CZO in THF solution and solid state were around 432, 419, and 411 nm, and the preliminary light‐emitting devices based on the copolymers of PIF‐DPE, PIF‐TPA, and PIF‐CZO emit blue light with the maximal emission peaks at around 437, 449, and 438 nm, respectively. The control of conjugated length of the copolymers and the achievement of blue light‐emitting conjugated polymers based on indeno[1,2‐b]fluorene, which satisfy both color purity and relatively high eye sensitivity, were achieved by the introduction of kink linkages into the polyindeno[1,2‐b]fluorenes backbone. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
ISSN:0021-8995
1097-4628
DOI:10.1002/app.35566