| Summary: | 碩士 === 國立高雄大學 === 化學工程及材料工程學系碩士班 === 103 === We have sucessfully synthesized two donor-acceptor alternating conjugated polymers P1 and P2 containing dithienosilole and benzofurazan derivatives as the donor and acceptor units, respectively, for the donor materials of the active layer by Stille coupling reaction.
Both of them exhibited the intramolecular donor-acceptor characteristic and displayed a panchromatic absorption ranging from 300 to 1000 nm and P1 have an ideal bandgap of 1.41 eV, and P2 is 1.38 Ev. The structure of the polymers were confirmed by FT-IR, 1H NMR, and 13C NMR.
Optoelectronic properties of the polymer were investigated and observed by UV-vis, photoluminescence spectrum, and cyclic voltammogram. Finally we were application of both of the synthesized materials in the active layers of polymer bulk heterojunction photovoltaic (BHJ) solar cells and the measurements of power conversion efficiency in different weight ratios of the Polymer : PCBM blends and different annealing temperatures on the performance of polymer solar cells using the blend (Polymer : PCBM) as active layers. The bulk heterojunction polymer solar cell incorporating P1 and PCBM at a blend ratio of 1:2 and annealing temperature 125℃ exhibited the highest short-circuit current density of 3.77 mA/cm2 and a power conversion efficiency of 0.95%. The bulk heterojunction polymer solar cell incorporating P2 and PCBM at a blend ratio of 1:1 and annealing temperature 150℃ exhibited the highest short-circuit current density of 4.13 mA/cm2 and a power conversion efficiency of 1.22%.
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