Issue 7, 2003
From the journal:

Journal of Materials Chemistry

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

Do-Hoon Hwang,*a   Jong-Don Lee,a   Jong-Min Kang,a   Sangphil Lee,b   Chang-Hee Leec  and  Sung-Ho Jind  

* Corresponding authors

a Department of Applied Chemistry, Kumoh National Institute of Technology, Kumi, Korea
E-mail: dhhwang@kumoh.ac.kr

b Hanwha Chemical R&D Center, 6 Shinsung Dong, Yusung-Ku, Taejon, Korea

c Department of Physics, Inha University, Incheon, Korea

d Department of Chemistry Education, Pusan National University, Pusan, Korea

Abstract

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 (∼5.5 eV) of the poly(FV-co-PV)s in comparison to that of PFV (∼5.7 eV).

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

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Article information

DOI
https://doi.org/10.1039/B303723A
Article type
Paper
Submitted
03 Apr 2003
Accepted
06 May 2003
First published
21 May 2003

J. Mater. Chem., 2003,13, 1540-1545

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

D. Hwang, J. Lee, J. Kang, S. Lee, C. Lee and S. Jin, J. Mater. Chem., 2003, 13, 1540 DOI: 10.1039/B303723A

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