Synthesis and characterisation of poly(distyrylbenzene-block-hexa(ethylene oxide)) and its fluorinated analogue - Two new block copolymers and their application in electroluminescent devices
2002 (English)In: Polymer, ISSN 0032-3861, Vol. 43, no 12, 3555-3561 p.Article in journal (Refereed) Published
Two new soluble block copolymers are reported in which chromophores and hexa(ethylene oxide) units alternate along the polymer backbone. In polymer 1 the chromophore was the distyrylbenzene unit. The polymer was synthesised via the Wittig reaction and the ionization potential of 5.4 ± 0.2 eV was measured by cyclic voltammetry and photoelectron spectroscopy. Polymer 1 showed a high solid-state photoluminescence efficiency (34%) and was used to make efficient (0.5 cd/A) light emitting diodes (LEDs). Polymer 1 was also used in light emitting cells, these showed luminescence in reverse bias and a reduced turn-on voltage compared to the LEDs. Polymer 2, in which the chromophore was dodecafluoro-distryrylbenzene, was prepared via the Horner-Wittig reaction and showed an ionization potential of 6.25 ± 0.15 eV and a solid-state photoluminescence efficiency of 17%. It was used as electron-conducting layer in a LED but failed to give significant electroluminescence. The optical energy gap for both polymers was 3.0 eV. © 2002 Published by Elsevier Science Ltd.
Place, publisher, year, edition, pages
2002. Vol. 43, no 12, 3555-3561 p.
Block-copolymer, Fluoropolymer, Synthesis
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-47040DOI: 10.1016/S0032-3861(02)00166-0OAI: oai:DiVA.org:liu-47040DiVA: diva2:267936