| Summary: | 博士 === 國立清華大學 === 化學工程學系 === 96 === The dissertation describes the author’s findings relating to the dye-sensitized solar cell (DSSC) system during his PhD work. Six chapters including first two introductory reviews and later four experimental results are elaborated in this thesis. To give a clearer picture of this thesis, the main contents are summarized as follows:
Chapter 1 introduces some general concepts of solar power and photovoltaic, including the magnitude of solar electricity potential and market, classification of solar cells and fundamentals of solar cell.
Chapter 2 is a reviewing work which collects at least 86 listed references. After the author’s digestion, the contents of this chapter are classified into 2 main categories: the components of DSSC and the natures of DSSC. For better systemization, each topic is further splitted into several parts like substrates, anode materials and cathode materials…etc.
Chapter 3 addresses on the significance of anode’s structure and the practical examinations from commercially available TiO2 nano-particles. By modifying or executing treatments on TiO2 films, the conversion efficiency of DSSC advances from 3.89% to 6.01% by employing commercial TiO2 nano-particles. The author also proposes future hints and directions for reaching highly efficient DSSC.
Chapter 4 states a unique method to prepare catalytic cathode for DSSC. Based on the knowledge and findings developing for Pd-catalyst in printed-circuit board industry in author’s laboratory, he modifies that system and successfully applies it in DSSC field. The novel cathode, PVP-capped Pt nano-clusters are deposited on ITO glass via a simple 2-step dip-coating process. This materials exhibits fair good catalytic performance at relatively low Pt usage in comparison with sputtered Pt electrode. Data revealing in this chapter also suggests the PVP surrounding nano-Pt plays an important role on ion-diffusing property and catalytic performance. The most important contribution of this work is this method involves neither vacuum facilities nor high temperature environments; it can operate in ambient temperature for cheaply mass production.
Chapter 5 introduces a novel cathode material for flexible DSSC. This is a internationally collaborative work with Prof. Miyasaka in Toin Yokohama University, Japan. We design and prepare a Pt/Ti bimetallic layer on PET film as an efficient counter electrode for flexible DSSC, the satisfying result exhibits not only highly catalytic performance on iodide/tri-iodide reaction but also low Pt usage by filling non-catalytic Ti under Pt-rich surface. Finally, a highly efficient flexible DSSC with 4.31% efficiency comprises TiO2 film on ITO-PEN and Pt/Ti counter electrode is fabricated.
Chapter 6 illustrates the synthesis of a micro-porous polymer film with cross-linking structure system. After soaking in liquid electrolyte, the wet film can utilize as the electrolyte in DSSC. The benefit of this electrolyte system is it not only shows comparable ionic conductivity to that in pure liquid electrolyte but also exhibits high mechanical strength when compare to traditional gel electrolyte system. The author also point out the significance of film thickness in polymer electrolyte system.
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