Syntheses and light-emitting properties of poly(9,9-di-n-octylfluorenyl-2,7-vinylene) and PPV copolymers

被引:34
作者
Hwang, DH [1 ]
Lee, JD
Kang, JM
Lee, S
Lee, CH
Jin, SH
机构
[1] Kumoh Natl Inst Technol, Dept Appl Chem, Kumi 730701, South Korea
[2] Hanwha Chem R&D Ctr, Taejon 305345, South Korea
[3] Inha Univ, Dept Phys, Inchon 402751, South Korea
[4] Pusan Natl Univ, Dept Chem Educ, Pusan 609735, South Korea
关键词
D O I
10.1039/b303723a
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A new class of light-emitting poly(p-phenylenevinylene) (PPV) derivative, poly(9,9-di-n-octylfluorenyl-2,7-vinylene) (PFV), and its PPV copolymers, poly[(9,9-di-n-octylfluorenyl-2,7-vinylene)-co-(1,4-phenylenevinylene)]s [ poly(FV-co-PV)s] were synthesized through Gilch polymerization, and their light-emitting properties were investigated. The copolymers showed almost the same optical properties as the PFV homopolymer, regardless of copolymer composition. The PFV and copolymers all showed their peak absorption and band edge at around 419 and 490 nm, respectively. The PFV and poly(FV-co-PV) s all showed PL emission maxima at approximately 465 nm. Light-emitting devices were fabricated with the configuration ITO (indium-tin oxide)/PEDOT/polymer/Al. Interestingly, the EL spectra of these devices were similar to the PL spectra of the corresponding polymer film. However, the EL devices constructed from the poly(FV-co-PV) s showed 10 times higher efficiency than the devices constructed from the PFV homopolymer. This higher efficiency is possibly a result of better charge carrier balance in the copolymer systems due to the lower HOMO level (similar to5.5 eV) of the poly(FV-co-PV) s in comparison to that of PFV (similar to5.7 eV).
引用
收藏
页码:1540 / 1545
页数:6
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