Author/Authors :
Yan Huang، نويسنده , , ZHI-YUN LU، نويسنده , , QIANG PENG، نويسنده , , Qing Jiang، نويسنده , , RU-GANG XIE، نويسنده , , Shao-Hu Han، نويسنده , , Lei-guang Dong، نويسنده , , Jun-Biao Peng، نويسنده , , Yong Cao، نويسنده , , Ming-Gui Xie، نويسنده ,
Abstract :
A series of novel coumarin-terminated poly(2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylene vinylene (CT-MEH-PPV) were synthesized successfully via Gilch methodology. Luminescent properties of CT-MEH-PPV were compared with those of blend systems. A light-emitting diode based on a double-layer structure (ITO/PEDOT/CT-MEH-PPV2/Ba/Al) has shown yellow emission with a maximum brightness of 956 cd m−2 at 8.8 V and an external quantum efficiency of 0.28% at 49.5 mA cm−2. These results suggest that modification of structures of conjugated polymers with end-cappers is a convenient way to tune the emission color and to improve photoluminescent and electroluminescent efficiencies.
Keywords :
Luminescence , Poly-p-phenylenevinylene , Coumarin , End-capping , Light-emitting diode
