New electroluminescent polymer with tetrakis-alkoxy group, poly[2,3,5,6-tetrakis(2-ethylhexyloxy)-1,4-
phenylenevinylene] (TEH-PPV), has been synthesized by the Gilch polymerization. TEH-PPV with tetrakisethylhexyloxy
groups in phenylene unit can get shorter conjugation length than MEH-PPV, and had more blue shifted
absorption and emission peaks due to steric hindrance. Tetrakis-ethylhexyloxy groups induced very conjugated
backbone is twisted. And, they can enhance the internal efficiency of the conjugated polymer as emissive layer in
PLED because of the restraint of inter-chain interaction by the avoidance of close packing to give decent device
performance.
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