量子点敏化太阳能电池光阳极的研究进展

介绍量子点敏化太阳能电池的发展现状及趋势,针对光阳极改性来提高量子点敏化太阳能电池转化效率的方法,从半导体薄膜、量子点共敏化、量子点掺杂3个方面综合分析光阳极的研究进展和相关技术。根据制约电池效率的主要因素,提出量子点敏化太阳能电池的未来发展趋势,包括继续优化光阳极半导体薄膜的组成及结构、探索新型的宽光谱响应量子点以及发展高效的界面修饰技术等。     

量子点敏化太阳电池中光阳极结构优化的研究进展

量子点敏化太阳电池(QDSSC)因具有高理论能量转换效率和低生产成本而受到研究者的广泛关注。简述了QDSSC的基本结构和工作原理,详细评述了基于半导体氧化物薄膜特别是TiO2和ZnO光阳极结构优化的QDSSC的研究进展,并结合目前QDSSC阳极结构研究中遇到的问题对今后基于光阳极优化的QDSSC发展进行了展望。     

Amine functionalized homoleptic ruthenium(II) sensitizer for dye-sensitized solar cells: A combined effect of ancillary ligands and co-sensitization

In this work, we propose a homoleptic ruthenium(II) complex, [Ru(dabpy)₃]Cl₂ (RDAB3) containing amine functionalized electron donating anchoring units for DSSCs. The DSSCs were co-sensitized by coumarin-based thiophene (CT) and indole (CI) units. The presence of four ancillary amine groups in RDAB3 influences its photovoltaic performance and the introduction of coumarin-based co-sensitizers significantly enhances the efficiency. The fabricated DSSCs were explored by UV-Visible absorption, photocurrent-voltage assessments, and impedance spectral studies. Co-sensitized DSSCs showed an improved photovoltaic efficiency than the device sensitized by RDAB3 alone. Under optimized condition, the device made up of RDAB3+CI exhibited a high Jsc = 9.9 mA/cm² with Voc of 0.7 V, fill factor of 0.773, and solar to power conversion efficiency of 5.35% in standard global AM 1.5 solar irradiation. This performance is found to be higher than the DSSC sensitized with RDAB3 (η = 3.84%) fabricated under same circumstances.     

Dye-Sensitized Solar Cells Based on the Principles and Materials of Photosynthesis: Mechanisms of Suppression and Enhancement of Photocurrent and Conversion Efficiency

Attempts have been made to develop dye-sensitized solar cells based on the principles and materials of photosynthesis: We first tested photosynthetic pigments, carotenoids (Cars), chlorophylls (Chls) and their derivatives, to find sensitizers showing reasonable performance (photocurrent and conversion efficiency). We then tried to introduce the principles of photosynthesis, including electron transfer and energy transfer from Car to Phe a. Also, we tried co-sensitization using the pheophorbide (Phe) a and Chl c₂ pair which further enhanced the performance of the component sensitizers as follows: J_sc = 9.0 + 13.8 → 14.0 mA cm⁻² and η = 3.4 + 4.6 → 5.4%.     

纯有机染料共敏化纳米晶太阳能电池的性能研究

采用曙红与香豆素混合的方法，配制成敏化剂修饰纳米晶薄膜．实验结果证明，这种共敏化的方法可以在可见光范围内有效提高电池的吸光度，使得电池的性能比单独使用曙红敏化有了大幅度提高．在模拟太阳光下，曙红与香豆素共敏化的电池的开路电压达到了532mV，短路电流达到了0．1125mA／cm^2。     

纯有机染料敏化剂在染料敏化太阳能电池中的应用及研究进展

染料敏化太阳能电池是一种新型的太阳能电池,因具有低成本、易制备、环保等优点而引起全世界的广泛关注。介绍了染料敏化太阳能电池的发展历史、基本结构及工作原理,重点综述了染料敏化剂材料的分类和发展状况。染料敏化剂可分为纯有机染料和配合物染料两大类,纯有机染料敏化剂大致有三苯胺、香豆素、吲哚、花箐和多烯等几类。设计和开发新型纯有机染料敏化剂材料是提高器件光电转化效率较为有效的方法,而多种染料敏化剂协同敏化电池的短路电流密度(J_(sc))和开路电压(V_(oc))比单一的染料敏化电池更大,因此多种染料共敏化也成为进一步提高染料敏化太阳能电池效率比较可行的途径。最后,展望了有机染料敏化剂的发展前景。     

天然染料敏化太阳能电池的研究进展

简单回顾了染料敏化太阳能电池的发展以及目前存在的弊端,分析了天然染料作为染料敏化太阳能电池敏化剂的优、缺点及发展潜力。按所用天然染料种类的不同,详细综述了近年来天然染料敏化太阳能电池的国内外研究进展,进而合理分析和预测了天然染料敏化太阳能电池的发展趋势及实用化必须解决的关键问题。