【作者】 李玲；

【导师】 赵建章； 杨希川；

【作者基本信息】 大连理工大学 ， 应用化学， 2011， 博士

【摘要】 染料敏化太阳能电池(DSC)作为一种新型太阳能的有效利用方式得到世界的广泛关注,这种电池制作工艺简单,成本低,不污染环境,具有高效稳定的优点,应用前景广阔。本论文采用高压水热法制备了纳米Ti02及Zr02掺杂的纳米Ti02多孔膜电极,以本组自制有机染料TH305和近红外染料HY103作为敏化剂对其进行光敏化。组装成双波段叠层染料敏化太阳能电池,详细研究了电池的光电转换性能,获得了11.5%的光电转换效率。采用电化学方法得到了纳米Ti02及Zr02掺杂的纳米Ti02多孔膜电极的平带电位,通过肖特基方程拟合出ZrO2-TiO2电极的平带电位为-0.62V。本论文采用高压水热法制备了纳米Ti02及MgO掺杂的纳米Ti02多孔膜电极,以有机染料TH305作为敏化剂进行光敏化,对其光电性质进行了研究。当MgO和Ti02的摩尔比为1:99时,复合电极的光电性能达到最佳,获得了8.21%的光电转换效率,相似条件下参比染料N719得到了7.91%的光电转换效率。采用电化学方法得到了纳米Ti02及MgO掺杂的纳米Ti02多孔膜电极的平带电位,通过肖特基方程拟合出MgO-TiO2复合电极的平带电位为-0.54V。本论文采用一种新的硫基氧化还原电对((CH3)4N)2S/((CH3)4N)2Sn作电解液,应用于CdS量子点敏化纳米Ti02太阳能电池,采用巯基乙酸(TGA)做稳定剂,反应在纯有机相中进行,获得了3.2%的光电转换效率和89%的填充因子。采用电化学方法测试了硫电解液的氧化还原电位,从理论上解释了CdS量子点敏化太阳能电池用硫电解液获得高电压和高填充因子的原因。本论文采用化学浸渍法制备了CoS对电极,以TH305染料做敏化剂,用硫电解液组装成电池,结合电化学阻抗光谱,详细研究了电池的光电转换性能,获得了5.24%的光电转换效率。更多还原

【Abstract】 As a new effective way of using solar energy, the dye-sensitized solar cells (DSC) have attracted considerable attention around the world, because of its simple preparation procedure, low cost, friendly environment action, high photoelectric conversion efficiency and better stability. Thus the DSC have good prospect in the research of solar cells.The nanoporous TiO2 and ZrO2/TiO2 films are prepared by high-pressure hydrothermal method, an organic dye TH305 and a near IR dye HY103 were used as sensitizer dyes, and a double-band tandem organic dye-sensitized solar cell was producted. We studied the photoelectric characteristics by details, obtained a conversion efficiency of 11.5%. At the same time, we used electrochemical impedence spectra to investigate the energy band in the composite electrodes. Based on the difference in the bleaching width of the TiO2 and ZrO2/TiO2 composite electrodes, the flat potential in the composite electrode was about-0.62V by fitting the curve through Mott-Schottky equation.The nanoporous TiO2 and MgO/TiO2 films are prepared by high-pressure hydrothermal method, TH305 was used as the sensitizer dye, the photoelectrochemical properties of the sensitized composite electrodes were studied. When the mol ratio of the MgO/TiO2 was 1:99, the photoelectrochemical properties of the composite electrode were optimal which showed prominent efficiency,8.21%. Under similar test conditions, the reference dye N719 showed 7.91% efficiency. At the same time, we used electrochemical impedence spectra to investigate the energy band in the composite electrodes. Based on the difference in the bleaching width of the MgO and MgO/TiO2 composite electrode, the flat potential in the composite electrode was about-0.54V by fitting the curve through Mott-Schottky equation.A sulfur-based electrolyte redox couple, (CH3)4N)2S/((CH3)4N)2Sn, was employed in CdS quantum dots (QDs) sensitized solar cells, and an unprecedented energy conversion efficiency of up to 3.2% was obtained with a very high fill factor (ff0.89) has been observed under AM 1.5 G illumination. The QDs were linked to nanoporous TiO2 via covalent bond by using thioglycolic acid (TGA), followed by chemical bath deposition (CBD) in an organic solvent to prepare the QDs-cells, facilitating high wettability and superior penetration capability of the TiO2 films. We studied the redox potentials of the sulfur-based electrolyte by using electrochemical method, and gave the theoretical explanation of the results from the high Voc and ff.A CoS electrode was prepared by chemical bath method, TH305 was used as the sensitizer dye, ((CH3)4N)2S/((CH3)4N)2Sn, as an organic electrolyte, the photoelectrochemical properties of the sensitized composite electrode were studied by electrochemical impedance spectra, and an energy conversion efficiency of up to 5.24% has been attained, under AM 1.5 G illumination.更多还原