H. Antoniadis et al., CHARGE-TRANSFER FROM POLY(P-PHENYLENE VINYLENE) INTO MOLECULARLY DOPED POLYMER, Applied physics letters, 62(24), 1993, pp. 3167-3169
We describe photoinduced charge transfer process in a bilayer device c
omprised of poly(p-phenylene vinylene) (PPV) layer and a trap-free mol
ecularly doped polymer containing diaryldiamine (TPD) dispersed in pol
ycarbonate (PC). The time resolved charge transfer from PPV to TPD:PC
in the presence of an electric field is analyzed. The injection (trans
fer) efficiency of the photoinduced holes from PPV into TPD:PC is abou
t 25% holes/photons at electric fields at 4 X 10(5) V/cm or higher. Mi
nimal trapping of photocarriers at the interface region between the tw
o polymer layers is associated with this transfer.