Design And Investigation Of Photoresponse Molecule And The Application Of The Photovoltaic Device

The diarylethenes are a series of photochromic compounds based on the open-ring toclose-ring isomerization, which is reversible under UV and Vis irradiation. Besides of thefantastic photochromic properties, they alao exhibit thermal stability, fatigue resistance and ashort response time, which shows great potentials for various applications. In this work, a novelseries of photoswitchable molecules, BMOA、BMTA、BMBO、BMBT, have been designed andsynthesized. Their photoswitch properties have been deeply studied.Flexible organic field-effect transistors have many advantages, such as the wide source ofmaterials, low-temperature processing, suitable for mass production, low cost and so on. In thestudies of organic field effect transistor, We have investigated the factors which affect theperformance of organic field effect transistors, such as coating speed, solution concentration,treatment time, heating treatment temperature. The compound944with high dielectric constantand PMMA are combined into a new insulating layer material to fabricate the flexible organicfield-effect transistor. The device performance with this new insulating layer has been greatlyimproved, and the device exhibits superior performance in the flexible bending.Based on the research on the photochromic compounds and field-effect transistor, a fieldeffect transistor device based on the photochromic compound BMOA and copper phthalocyaninehas been prepared. The device exhibits both field-effect characteristics and optical switchingcharacteristics, indicative a novellight/electric two-mode-controlled multifunction OFETdevices. The tuning of the device performance is much related to the intrinsic photoswitchablecharacteristics of the BMOA molecules, which provides a theoretical and experimental basis forthe further applicationof diarylethenes based photoswitchable molecules in the flexiblefield-effect transistores.