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High‐Performance Photorefractive Composite Based on Non‐conjugated Main‐Chain, Hole‐Transporting Polymer
Author(s) -
Moon In Kyu,
Choi Jongwan,
Kim Nakjoong
Publication year - 2013
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201200638
Subject(s) - diffraction efficiency , composite number , photorefractive effect , materials science , conjugated system , polymer , doping , polymer chemistry , optoelectronics , composite material , grating
The photorefractivity of a non‐conjugated main‐chain polymeric composite, composed of electron‐rich N,N ‐di‐toly‐ N,N′ ‐diphenylbiphenyldiamine doped with 2‐{3‐[( E )‐2‐(piperidino)‐1‐ethenyl]‐5,5‐dimethyl‐2‐cyclohexenylidene}‐malononitrile (P‐IP‐DC) and [6,6]‐phenyl‐C 61 ‐butyric acid methyl ester (PCBM), is studied using two‐beam coupling and degenerate four‐wave mixing at 633 nm. The N,N′ ‐di‐toly‐ N,N′ ‐diphenylbiphenyldiamine‐based composite shows a gain coefficient of 215 cm −1 at 80 V μm −1 with s ‐polarized beams and a diffraction efficiency of 67% at 30 V μm −1 , with a response time of the diffraction efficiency of 344 ms at T g + 4.6 °C. Comparing the photorefractive grating response time of the 3,3′‐dicarbazole‐containing polymer composite with that of the N,N′ ‐di‐toly‐ N,N′ ‐diphenylbiphenyldiamine‐based composite shows that the former is more than three times faster.