Dye sensitized titanium dioxide nanocrystalline solar cell (DSSC) is the research frontier of the third-generation solar cells. Our group focued on the key technical issuse such as efficiency, cost and stability, concentrated on the core science problems including the generation, migration and collection of photogenerated carriers, investigated the relationship among composition and structure, preparation and fabrication, properties and performance of materials and device. Novel photoanode, electrolyte and anticathode and other advanced fuctional materials have been developed. Three significant scientific issues are clarified and ten important innovations are highlighted in this presentation.<br/>In Photoanode: The conversion luminescence and doping effect of rare earth ions in DSSC is demonstrated. The controllable growth of TiO<sub>2</sub> nanocrystalline mesoporous film and ultra-thin layer is realized; Organic dyes is extracted from natural plants as light absorbers; The device performance is significantly improved by conversion luminescence and doping effect of rare earth ion. In Electrolyte: The interaction among matrix, solvent and ion in electrolyte, and the mutual restriction rule of fluidity, conductivity and stability are elucidated. Thermoplastic gel electrolytes based on polyvinyl alcohol and others are developed; Thermosetting gel electrolytes based on polyacrylic acid and others are developed; Poly(N-methyl-4-vinyl-pyridine iodine) solid polyelectrolyte is prepared; A UV responsive organic-inorganic hybrid heterojunction solar cell is exhibited. In Anticathode: The relationship among electrode interface property, catalytic activity, conductivity, light transmittance and photovoltaic performance is elucidated. All titanium based rear illumination large area flexible solar cell is fabricated; Conductive polymer anticathodes such as polyaniline and polypyrrole are firstly prepared; A variety of novel Pt-free and Pt-less anticathodes with low cost, low impedance and excellent catalysis are developed.

Advanced functional materials in dye-sensitized solar cells

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ACS Fall 2022

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