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13 February 2008 The color tuning of PPV derivative by substituted tetrakis-ethylhexyloxy groups
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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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Youngran Goo, Youngeup Jin, Suhee Song, Jin Young Kim, Kwanghee Lee, and Hongsuk Suh "The color tuning of PPV derivative by substituted tetrakis-ethylhexyloxy groups", Proc. SPIE 6910, Light-Emitting Diodes: Research, Manufacturing, and Applications XII, 69101G (13 February 2008);

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