高效窄带隙共轭聚合物太阳能电池材料设计及器件性能研究进展

Recent Progress of Design and Device of High Efficiency Low Band Gap Conjugated Polymer Materials for Application in Solar Cells

窄带隙聚合物材料因能与太阳光谱更好地匹配而备受重视,是聚合物太阳能电池的研究热点。按照窄带隙聚合物给体单元的结构分类,总结了含芴、硅芴、咔唑、环戊二烯并双噻吩、三苯胺和吩噻嗪给体单元的太阳能电池材料的设计以及器件性能,介绍了聚合物的HOMO和LUMO能隙值对其光谱和光电转换效率的影响,并指出了该研究领域目前存在的问题及今后的发展方向。

Low band gap conjugated polymer materials have attracted great interest in the research field of novel solar cells due to their spectrum matching the solar spectrum. Design and device of various types of low band gap polymer materials are summarized briefly, according to different donor units, such as fluorene, silafluorene carbazole, cyelopenta[2,1-b： 3,4-b＇]dithiophene（CPDT）, triarylamine and phenothiazine-based polymers. The magnitude of the hand gap and the energy positions of the HOMO and LUMO energy levels are the most important characteristics for determining the optical and electrical properties of a given eoniugated polymer. These in turn greatly influence the ulti- mate power conversion efficiency. The existing problems and future prospect of this kind of materials are discussed.