ICCAS OpenIR
New series of blue-emitting and electron-transporting copolymers based on cyanostilbene
Zhan, XW; Wang, S; Liu, YQ; Wu, X; Zhu, DB
2003-05-20
Source PublicationCHEMISTRY OF MATERIALS
ISSN0897-4756
Volume15Issue:10Pages:1963-1969
AbstractA novel series of conjugated copolymers having fluorene and binaphthyl moieties in the main chain and based on cyanostilbene were synthesized in good yields by a palladium-catalyzed Suzuki coupling reaction, a new approach different from the traditional Knoevenagel condensation polymerization. Through controllable modification of the main chain structures, not only were the thermal, electronic, and optical properties of the polymers tuned, but also the structure-property relationships were studied. All these polymers possess excellent thermal stability with glass-transition temperatures of 60-159 degreesC and onset decomposition temperatures of 411-417 degreesC. Cyclic voltammetry studies reveal that these copolymers have low-lying LUMO energy levels ranging from -2.92 to -3.08 eV and low-lying HOMO energy levels ranging from -6.01 to -6.13 eV, and they may be promising candidates for electron-transporting or hole-blocking materials in light-emitting diodes (LEDs). The polymers in thin films emit strong blue luminance around 457-489 nm with narrow bandwidth upon photoexcitation. The single-layer LED fabricated with a copolymer F-CN composed of fluorene and cyanostilbene units using an air-stable aluminum electrode emits blue light with an external quantum efficiency of 0.006%. A double-layer LED, fabricated using a blend of poly(N-vinylcarbazole) and F-CN as emitting layer and tris(8-hydroxyquinolinato)aluminum as electron transporting layer, shows an external quantum efficiency of 0.2%. Preliminary electroluminescent results show that these polymers are new candidates for blue emissive materials in polymeric LEDs.
DOI10.1021/cm020843k
Indexed BySCI
Language英语
WOS IDWOS:000182956200009
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:67[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80244
Collection中国科学院化学研究所
Corresponding AuthorLiu, YQ
AffiliationChinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Zhan, XW,Wang, S,Liu, YQ,et al. New series of blue-emitting and electron-transporting copolymers based on cyanostilbene[J]. CHEMISTRY OF MATERIALS,2003,15(10):1963-1969.
APA Zhan, XW,Wang, S,Liu, YQ,Wu, X,&Zhu, DB.(2003).New series of blue-emitting and electron-transporting copolymers based on cyanostilbene.CHEMISTRY OF MATERIALS,15(10),1963-1969.
MLA Zhan, XW,et al."New series of blue-emitting and electron-transporting copolymers based on cyanostilbene".CHEMISTRY OF MATERIALS 15.10(2003):1963-1969.
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