| Summary: | 碩士 === 國立中央大學 === 化學學系 === 105 === New small molecules based on BSTT, DSDTT, and SBT(T,T) cores have been developed for organic thin film transistors (OTFTs). Two p-type and one n-type materials were synthesized and characterized. The highly planar DSDTT core was confirmed by single crystal structure and DSDTTQ-8 (3) exhibits the mobility up to 0.01 cm2/V-1s-1.
Three new regio-specific ((H,H), (T,T), and (H,T)) SBT-based polymers were developed which bearing thioalkyl chains (C20H41) in different positions of the SBT core. Furthermore, five new FFBT-SBT based polymers were developed where the SBT units were connected with different thioalkyl chains or alkyl chains. pffBT-SBT(T,T)-20 (4) exhibits a PCE up to 6.4% and pffBT-S16-C16 (7) exhibits a high PCE up to 9.43% in OPV. The optimization of FFBT-based polymer is still in progress.
The optical and electrochemical (HOMO and LUMO) properties of these materials were characterized by UV-vis and DPV. Thermal properties were investigated by TGA.
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