Highly efficient pure blue electroluminescence from polyfluorene: Influence of the molecular weight distribution on the aggregation tendency

Authors
Weinfurtner, KH Fujikawa, H Tokito, S Taga, Y
Citation
Kh. Weinfurtner et al., Highly efficient pure blue electroluminescence from polyfluorene: Influence of the molecular weight distribution on the aggregation tendency, APPL PHYS L, 76(18), 2000, pp. 2502-2504
Citations number
7
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
76
Issue
18
Year of publication
2000
Pages
2502 - 2504
Database
ISI
SICI code
0003-6951(20000501)76:18<2502:HEPBEF>2.0.ZU;2-9
Abstract
A dependency between the molecular weight distribution of polyfluorene (PFO ) and its aggregation tendency on operation in organic light-emitting devic es (OLED) is described. As a result of these findings, low molecular parts of the polymer could be made responsible for the aggregation in liquid crys talline PFO. Consequently, a procedure was developed which leads to PFO-bas ed OLEDs which do not show aggregation on operation anymore but exhibit hig hly efficient and stable blue electroluminescence. (C) 2000 American Instit ute of Physics. [S0003-6951(00)02518-3].