【作者】 谷笛；

【导师】 王宝辉；

【作者基本信息】 大庆石油学院 ， 应用化学， 2008， 硕士

【摘要】 利用染料敏化光电池（简称DSC,Dye-sensitized photocell）分解水制取氢气,将太阳能转化成电能和化学能,能有效地解决能源和环境污染问题,可以形成一种良性循环的能源体系,有可持续发展的前景。本文研究了可将太阳能转换成电能的染料敏化光电池的制备和优化。实验中以纳米TiO₂薄膜作为DSC的光阳极,通过优化使DSC获得了较高的光电压和光电流密度,并且利用染料敏化光电池得到的电能,作为分解水电极的电能来源。本文用溶胶-凝胶法和溶胶凝胶+粉末法两种方法制备染料敏化光电池的光阳极,通过比较两种方法制备的DSC的光电性能,最终选择了溶胶凝胶+粉末法制作的DSC作为分解水的光电单元。以电镀法在FTO导电玻璃上沉积铂制得铂对电极。另外,试验了多种染料作为染料敏化光电池的敏化剂,最终选择了曙红Y作为分解水制氢的光电单元的敏化剂。本文对影响TiO₂薄膜电极性能的聚乙二醇的分子量、膜厚、退火温度等因素进行了研究。结果表明,上述三个因素对TiO₂薄膜的微观结构均有影响。同时不同阳离子的掺杂以及掺杂量的不同也对TiO₂薄膜的光催化活性存在影响。综合了最佳的制备工艺,得到优化的太阳能电池（面积5mm×5mm）的光电压为0.628V,短路光电流密度为1.15mA/cm²,填充因子为0.425,最大功率为0.307mW/cm²,最后的光电转化效率为0.42%。利用染料敏化光电池耦合分解水电极来制取氢气,比传统的光电解池电解水制氢能耗要小得多,而且因为整个太阳能电池系统是处在空气中,也同时解决了光电解池中电解水电极腐蚀严重的问题。实验中研究了三个染料敏化光电池串联作为光电单元的工作情况,整个光电系统的开路电压为1.547V,说明利用多染料敏化光电池串联分解水制取氢气的可行性。更多还原

【Abstract】 Awareness of the disastrous consequences of environmental pollution and climate change is growing rapidly. Solar energy driven water splitting is the most promising alternative for the fuel of the future. One of the most promising methods of obtaining hydrogen is by using solar energy from photovoltaic-based electrolysis. A research focused on harvesting solar energy to produce hydrogen by using dye-sensitized solar cell was studied in the paper. We prepared the nano-TiO₂ thin film photo-electrodes by the methods of sol-gel and sol-gel plus powder, comparing the photoelectric performances of DSC made from two methods. We choosed the DSC made from sol-gel plus powder as photoelectric unit of water spiltting. The Pt counter-electrode was prepared by the method of electroplating, decomposing the Pt on the base of FTO glass. And we test many pigments as sensitized dye, the Bromeosin Y was selected as sensitizers finally.The main influencing factors of TiO₂ electrode such as the molecular weight of PEG（Polyethylene glycol）, coating times and annealing temperature were detailed studied. The microstructure of titania films could be modulated by the molecular weight of PEG、coating times and treating temperature. Based on such preparation technics, we obtained the optimized solar cell（area:5mm×5mm）with photo-voltage 0.628V、photo-current density 1.15mA/cm², fill factor 0.425, peak power 0.307mW/cm² and photoelectric conversion efficiency 0.42%.It needs much less energy to electrolyze water by dye sensitized photocell than the traditional photo-electrolysis cells, and solves the corrosion problem of electrode in electrolytic cell because the whole solar power system is in the air. We used three serial dye sensitized solar cells as energy sources, making the open circuit voltage of 1.547V, which showed the feasibility of hydrogen generation from water by dye-sensitized solar cell.更多还原