MATERIAL FOR ORGANIC ELECTROLUMINESCENT ELEMENTS AND ORGANIC ELECTROLUMINESCENT ELEMENT
申请人:Takata Yoshiyuki
公开号:US20090156827A1
公开(公告)日:2009-06-18
An object of the present invention is to provide a material for high-brightness, high-efficiency, longer-life organic EL elements and an organic EL element produced by using the same.
Provided is a material for organic EL elements, comprising a compound represented by the following General Formula (1):
wherein, R
1
and R
2
each independently represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group.
A series of thiazolothiazoleâphenylene co-oligomers was synthesized and their properties, particularly as semiconductors for OFETs, were investigated. The naphthyl and biphenyl- substituted derivatives showed p-type semiconducting behavior with hole mobilities ranging from 10â2 to 10â1 cm2 Vâ1 sâ1. The hole mobility and on/off ratio were enhanced to 0.12 cm2 Vâ1 sâ1 and 106 on the HMDS treated substrate. The introduction of phenyl groups as end substituents was found to be favorable for charge transport and air-stability.