| 초록 |
A promising hybrid donoracceptor pair for photovoltaics are MEH-PPV type conjugated polymers and titanium dioxide, owing to the high optical absorption of the polymer in the visible range and the band offset at the titania/ MEH- PPV interface, which induces electron transfer from the photo-excited polymer to titanium dioxide. To provide efficient exciton dissociation into charges prior to recombination, the phase separation between the organic and inorganic species must be on the same scale as the polymer exciton diffusion length, that is, 820 nm. We have studied the characteristics of photovoltaic devices having TiO2 thin film, which were made by a sol-gel method. The TiO2 mesoporous structure were characteriged with XRD(X-ray diffraction) pattern, SEM(Scanning electron microscope) images. We have also measured the I-V characteristic of photovoltaic device containing the MEH- PPV -Incorporated TiO2 mesoporous film. |
