Author/Authors :
Lee، نويسنده , , C.H. and Park، نويسنده , , J.Y. and Park، نويسنده , , Y.W. and Moses، نويسنده , , D. and Heeger، نويسنده , , A.J. and Noguchi، نويسنده , , T. K. Ohnishi، نويسنده , , T.، نويسنده ,
Abstract :
The polarization dependence of the photoconductivity (PC) is studied in stretch-oriented poly(p-phenylenevinylene) films. Differences in the recombination dynamics and spectral responses of the photocurrent are observed for different polarization directions. The steady-state PC spectra show well-resolved vibronic structures with a PC onset at about 2.2 eV in the oriented PPV. The transient subnanosecond PC shows larger photocurrent and lifetime for carriers generated by light polarized perpendicular to the orientation axis.
Keywords :
photoconductivity , photoexcitation , Polarization dependence , Poly(p-phenylenevinylene)
