Blue light-emitting polymer containing 9, 10-diphenylanthracene moiety and electroluminescent device using the same
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United States of America Patent
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Issued Date -
Aug 21, 2003
app pub date -
Nov 8, 2002
filing date -
Nov 9, 2001
priority date (Note) -
Abandoned
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Abstract
There are provided novel blue light-emitting organic electroluminescent polymers having a main chain consisting of 9,10-diphenylanthracene and vinylene, and electroluminescent devices using the same. With the introduction of substituents which are of high thermal stability and are capable of steric hindrance at the alpha position of the vinyl group, the electroluminescent polymers make it easy to conduct inter- and intra-molecular energy transfer, and the injection and transportation of holes or electrons, as well as restraining .pi.-stacking between polymer chains. Also, the prevention of intermolecular two- and three-dimensional interference by the introduced bulky substituents leads to reduced extinction of excitons, whereby the organic electroluminescent device can emit blue light at high luminous efficiency.
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