| Summary: | 博士 === 國立交通大學 === 應用化學系碩博士班 === 99 === A thesis presented on the thermally polymerizable PCBM-based n-type materials and the application in polymer solar cells thereof. In situ thermal polymerization of these fullerene-based materials was carried out by heating at a low temperature of 160 °C for 30 min to generate a robust, adhesive, and solvent-resistant thin film. This cross-linked network enables a sequential active layer to be successfully deposited on top of this interlayer to overcome the problem of interfacial erosion and realize a multilayer inverted device by all-solution processing. Furthermore, a second approach employed in device fabrication utilizing indene-C60 bis-adduct (ICBA) as the acceptor in the active blend demonstrates high open-circuit voltages (Voc) of 840 mV and an exceptional power-conversion efficiency of 6.2% due to ICBA’s high-lying LUMO level. Both these high performance approaches are combined to successfully develop highly-efficient and air-stable inverted BHJ solar cells. The polymerizable fullerene-based materials are further incorporated into a poly(3-hexylthiophene) (P3HT):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) blend to form an active layer of ternary blend. The blending systems are first thermally annealed at 110 oC for 10 min to induce optimal morphology, followed by heating at 150 oC for 10 min to trigger the in situ polymerization of styrene groups. Through polymerization of the PCBSD and PCBS, the initial morphology of the blend can be effectively fixed and stably preserved. Consequently, the corresponding devices exhibit an exceptional device lifetime upon thermal heating.
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