Author/Authors :
Vijila، نويسنده , , Chellappan and Balakrisnan، نويسنده , , Bavani and Huang، نويسنده , , Chun and Chen، نويسنده , , Zhi-Kuan and Zhen، نويسنده , , Chang-Gua and Auch، نويسنده , , Mark Dai Joong and Chua، نويسنده , , Soo Jin، نويسنده ,
Abstract :
We studied the charge mobility characteristics of a series of new poly (p-phenylenevinylene) PPV derivatives, with different substituents (CF3, OCH3, F) on their biphenylyl side chains, using a conventional time of flight (TOF) photoconductivity technique. The TOF hole transients at 295 K showed a non dispersive nature of transport and the dependence of hole mobility with applied electric field follows Pool–Frenkel relation. The present results indicate that the charge mobility characteristics can be fine-tuned by varying the size of the substitutents on the biphenylyl side chains, which is in good agreement with the PLED device performance.
