论文部分内容阅读
人们广泛开展了用有机染料敏化带隙较宽的半导体研制有机光化学电池,但这些电池的光电转换效率不够理想.研究表明,平滑的电极表面吸附单层染料分子不能有效吸收太阳光;而吸附多层染料虽可以吸收更多的光子,但电阻也增加,总的光电转换效率降低.最近,Gratzel等人用二氧化钛超微粒制备了多孔电极,由于其比表面积大,电极表面能吸附较多的染料分子,因而光电转换效率大大提高.但他们所用的有机染料联吡啶钉仅能吸收500nm左右的光能.因此,寻找一种稳定性好,在近红外区有强吸收的有机光敏染料成为有机光电池研究的热点.酞菁化合物具有良好的光、热稳定性,并在近红外区有强吸收,它是一种优良的光敏染料.本文研究了无中心金属磺化酞菁钠盐(H_2TSPc)、镓磺化酞菁钠盐(GaTSPc)和钛
The widespread use of organic dyes to sensitize the wider bandgap semiconductor developed organic photochemical cells, but the photoelectric conversion efficiency of these cells is not ideal.Research shows that smooth electrode surface adsorption monolayer dye molecules can not effectively absorb sunlight; and adsorption Although multi-layer dyes can absorb more photons but also increase the resistance and decrease the total photoelectric conversion efficiency, recently, Gratzel et al. Prepared porous electrodes with titanium dioxide superfine particles, which adsorb more on the electrode surface due to their large specific surface area Dye molecules, and thus greatly improve the photoelectric conversion efficiency.But they use the organic dye bipyridine nail can only absorb about 500nm light energy.Therefore, to find a good stability, strong absorption in the near-infrared region of organic photosensitive dyes become organic Photo-cell research hot spots.Phthalocyanine compounds with good light and thermal stability, and strong absorption in the near-infrared region, it is an excellent photosensitizing dye.In this paper, the non-central metal sulfonated phthalocyanine sodium salt (H_2TSPc) , Gallium sulfonated phthalocyanine sodium salt (GaTSPc) and titanium