Temperature dependent photoluminescence and electroluminescence propertiesof polythiophene with hydrogen bonding side chain

We have investigated the temperature dependent optical absorption, photolum inescence (PL) and electroluminescence (EL) properties of a highly soluble and hydrogen-bond forming polythiophene with a urethane side chain, poly[2- (3-thienyl)ethanol n-butoxy carbonyl-methylurethane] (PURET). We have found that PURET shows the thermochromism and the temperature dependence in EL a nd PL spectra. Within a limited temperature range, the EL and PL intensitie s increase with increasing temperature and this is attributed to the therma lly induced deformation of the ordered portion in polymer chain. (C) 1998 E lsevier Science S.A. All rights reserved.