Synthesis of carbazole-containing PPV and its application to the electroluminescent devices

Citation
Js. Lee et al., Synthesis of carbazole-containing PPV and its application to the electroluminescent devices, MAT SCI E B, 85(2-3), 2001, pp. 186-189
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
ISSN journal
0921-5107 → ACNP
Volume
85
Issue
2-3
Year of publication
2001
Pages
186 - 189
Database
ISI
SICI code
0921-5107(20010822)85:2-3<186:SOCPAI>2.0.ZU;2-U
Abstract
Carbazole-containing PPV (CC-PPV) was chemically synthesized and demonstrat ed to be electroluminescent for application to a light emitting diode (LED) . Soluble CC-PPV copolymer was prepared from dialdehyde monomer and diphosp honium. salt in a mixed solvent (ethanol/chloroform) by the well-known Witt ig reaction. The UV-Vis absorption spectrum of CC-PPV copolymer in chlorofo rm has a maximum absorption wavelength at 408 mn, which is caused by the pi -pi* transition of the conjugated system. In PL spectrum, maximum wavelengt h of emission was found at 512 nm. From the thermogravimetric analysis (TGA ) it was confirmed that the synthesized CC-PPV has a thermal stability up t o 180 degreesC. For the fabrication of a LED, the synthesized CC-PPV was di ssolved in toluene to prepare an 1.0 wt% solution and the film cast from th is solution was demonstrated to be light-emitting at an applied voltage of 3.7 V. (C) 2001 Elsevier Science B.V, All rights reserved.