Poly (phenylenevinylene) derivatives substituted with spirobifluorenyl group(s) and electroluminescent devices prepared using the same
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United States of America Patent
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Issued Date -
May 23, 2002
app pub date -
Oct 4, 2001
filing date -
Oct 6, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Disclosed is an organic electroluminescent polymer represented by the following Formula 1: 1 wherein both A and B are 2 or any one of A and B is 3 and the other is R.sub.5; R.sub.3, R.sub.4 and R.sub.5 are independently selected from the group consisting of hydrogen, phenoxy group substituted with C.sub.1-20 alkyl group, C.sub.1-20 alkoxy group, C.sub.1-20 alkoxyphenyl group, C.sub.1-20 alkyl group and C.sub.3-21 .omega.-methoxy poly ethylene oxide group; m is an integer of 0 to 50,000; n is an integer of 1 to 100,000, proviso that n is greater than m. An electroluminescent device prepared using the electroluminescent polymer according to the present invention has an improved luminous efficiency and stability by solving problems associated with the heat generated during the driving of the device, and preventing deterioration of luminescence due to the .pi.-stacking of polymers for Forming the organic film.
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