| Summary: | 碩士 === 輔仁大學 === 化學系 === 106 === The research is mainly divided into two parts. The first part is about the molecular morphology of the active layer in organic solar cells. The second part is about the anti-corrosion of conductive polymer P3HT on iron.
At present, organic heterojunction structure is mainly used in the research of organic solar cells. But the PCBM tends to aggregate after thermal annealing treatment. The surface morphology is not easily controlled and leads to severe the phase separation. In this study, two C60 derivatives, phenyl C61-hexane (PCH) and phenyl C61-3-methylbutane (PCMB), were compared to phenyl C61-butane (PCB) in studying the concept of "similar structure" additives to the P3HT / PCBM blend system, by decreasing the purity of PCBM and disrupted its arrangement and crystallization, thereby, inhibiting the generation of large amounts of PCBM aggregates. OM and TEM studies show that, compared to PCB and PCMB, P3HT / PCBM / PCH blended film shows more PCBM agglomerates after thermal- trectment indicating PCH has less influence on the aggregation of PCBM. XRD, DSC, and Absorption spectra results confirm that PCH tends to interact with P3HT with its long alkyl side-chain and, therefore, restrain itself to interact with PCBM.
In the second part, P3HT with different regioregularities were processed with different solvent and heat treatment to investigate how crystallinity affect anticorrosion properties on iron. Additionally, P3OT was blended with P3HT to control crystallinity. Electrochemical study by CV shows that anticorrosion properties of P3HT on iron can be improved at higher crystallinity.
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