量子点敏化太阳能电池研究进展文档课件.doc

量子点敏化太阳能电池研究进展 摘要： 量子点敏化太阳能电池(QDSCs)因其制备成本低、工艺简单及量子点(QDs)本身的优异性能(如尺寸效应、多激子效应)等优点，近年来受到广泛关注。在此类电池中，无机半导体量子点敏化剂作为吸光材料，其自身的光电性质、制备方法、表面缺陷、化学稳定性及其在TiO2光阳极上的敏化方法等是影响电池性能的关键。本文综述了无机半导体量子点敏化剂(包括窄带隙二元量子点、多元合金量子点及Type-II核壳量子点)的必威体育精装版研究进展，重点介绍了胶体量子点的制备方法；分类阐释了量子点在TiO2光阳极表面的沉积与敏化方法，特别是双官能团辅助自组装吸附法；总结了针对提高电子注入效率和减少复合的量子点表面修饰方法；最后简要介绍了QDSCs的电解质和对电极的研究进展。 关键词： 量子点敏化太阳能电池；无机半导体量子点；胶体量子点；双官能团辅助自组装；表面修饰 Progress in Quantum Dot-Sensitized Solar Cells Abstract: Quantum dot-sensitized solar cells (QDSCs) have attracted much attention in the past few yearsbecause of the advantages of quantum dots (QDs), including low cost, easy fabrication, size-dependence bandgap, and multiple exciton generation (MEG). The properties of QD sensitizers influence the performanceof QDSCs, such as their photoelectric characteristics, preparation methods, surface defects, chemical stability,and their sensitization towards TiO2 photoanodes. This review demonstrates the development of QD sensitizers, including narrow bandgap binary QDs, ternary or quaternary alloyed QDs, and Type-II core-shellQDs, especially the preparation methods of colloidal QDs. Furthermore, the deposition and sensitization methods of QDs are introduced in detail, particularly bifunctional-assisted self-assembly deposition.Meanwhile, methods to improve electron injection efficiency and reduce charge recombination are also summarized. Finally, a brief introduction is provided to the development of electrolytes and counter electrodes in QDSCs. Key Words: Quantum dot-sensitized solar cell;Inorganic semiconductor quantum dot;Colloidalquantum dot; Bifunctional-assisted self assembly; Surface treatment1 引言 太阳能电池是一种利用光伏效应或光化学效应将太阳能转化为电能的能量转换形式。按照其发展历程，太阳能电池可以分为三类：以单晶硅太阳能电池为代表的第一代太阳能电池，这类电池发展最为成熟，最高光电转换效率已达25%，且稳定性好，在市场上占据着主导地位，但是高纯度的单晶硅价格昂贵，较高的生产成本使其目前仍难以和传统能源相竞争；以铜铟镓硒(CIGS)和碲化镉(CdTe)薄膜太阳能电池等为代表的第二代太阳能电池，采用高消光系数、直接带隙吸光材料可以有效降低电池的制造成本，光电转换效率可达20%以上，但受到环境污染和稀有元素In储量低的限制；此外，以铜锌锡硫(CZTS)太阳能电池、染料敏化太阳能电池、钙钛矿型太阳能电池和量子点太阳能电池等低成本、高效率新型太