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Synthesis and Light-Emitting Properties of a Novel p-Conjugated Poly[di(p-phenyleneethynylene)-alt-p-phenylenecyanovinylene)] Containing n-Octyloxy Side Branches

Cited 4 time in webofscience Cited 5 time in scopus
Authors
Chi, Jun Ho; Lee, Chang-Lyoul; Kim, Jang-Joo; Jung, Jin Chul
Issue Date
2008-01-18
Publisher
Wiley-Blackwell
Citation
J Appl Polym Sci 2008, 108, 914
Keywords
poly(p-phenyleneethynylenecyanovinylene)]poly(p-phenylenecyanovinylene)poly[di(p-phenyleneethynylene)-alt-(p-phenylene-1-cyanovinylene)]electroluminescent poly(p-phenyleneethynylenecyanovinylene)light-emitting polymer
Abstract
A novel -conjugated poly[di(p-phenyleneethynylene)-alt-(p-phenylenecyanovinylene)] having n-octyloxy side chains (PPE-C8PPE-PPV) was prepared by polymerization of the monomer DEDB with BCN. Chemical structure of the polymer obtained was confirmed by 1H NMR, FTIR, and EA. PPE-C8PPE-PPV had a molecular weight enough to fabricate the electroluminescent (EL) device, and showed a good organosolubility, excellent thermal stability, and film-forming property. In UV absorption and PL spectra in film it showed a maximum at 430 and 543 nm, respectively, which appeared 5 and 41 nm longer wavelengths than that of the solution, respectively. HOMO, LUMO energy levels and band gap were determined to be -5.70, -3.29, and 2.41 eV, respectively. Two EL devices with low-work function cathodes were fabricated with the structures of ITO/PEDOT/PPE-C8PPE-PPV/cathodes (LiF/Al and Mg:Ag/Ag). The both devices exhibited a bright green light emission at 545 nm and the maximum luminescence of 197 cd/cm2 (LiF/Al) and 158 cd/cm2 (Mg:Ag/Ag).
ISSN
0021-8995
Language
English
URI
http://hdl.handle.net/10371/7004
DOI
https://doi.org/10.1002/app.27293
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Journal Papers (저널논문_재료공학부)
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