| 초록 |
Today, Imagesensor applied for a lot of fields such as autonomous vehicle, robot and industry. But there is a problem that should be solved. Mostly organic photodiode concentration upon blue and green selective photodiode. So, We suggest a synthetic strategy to achieve thin film red-selective photodiode, which is the most important requirement for commercializing organic photodiode. A new conjugated polymer is synthesized by difluorobenzothiadizole with a difuorinated donor moiety. A organic photodiode with a structure of ITO/ZnO/Active layer(BHJ, 550nm)/MoO3/Ag exhibits a high detectivity of ~6 × 1012 jones at 650 nm with a low noise equivalent power as well as full width at half-maximum. Our study clarify the origin of the thin-film color-selectivity to weakened intramolecular charge transfer between the donor and acceptor as confirmed by grazing-incidence X-ray diffraction. As a results, a substantial number of photogenerated charges can remain as space charge carriers. This research shows the capability of realization of red color selectivity of a polymer photodiode even at a thin film thickness. |
