基于噻咯的聚合物给体光伏材料

Silole-Containing Polymer Photovoltaic Donor Materials

聚合物太阳能电池由于具有结构简单、成本低、重量轻和可制成柔性器件等突出优点,近几年受到了越来越多的关注。但是,与传统的无机硅系太阳能电池相比,较低的能量转换效率一直是制约其发展的瓶颈。近年来大量的研究显示,噻咯结构单元被引入给-受体(D-A)型共轭聚合物光伏材料中,能有效地改善相应聚合物的结晶性能,并调节其能级结构(HOMO/LUMO),从而显著改善聚合物的光伏性能。本文综述了含有噻咯环的低能隙共轭聚合物给体光伏材料的研究进展,重点介绍了含有二噻吩并噻咯单元的窄带隙D-A共轭聚合物的最新研究,并进一步提出了给体材料的研究方向以及有待解决的问题。

Bulk heterojunction polymer solar cells （PSCs） have attracted much attention in recent years due to their advantages of easy fabrication, simple device structure, low cost, light weight, and capability to be fabricated into flexible devices. However, the maximum power conversion efficiency （PCE） of the present PSCs is still much lower than that of silicon solar cell and need to be further improved for the demand of commercial production. Recent studies indicated that the incorporation of silole （silacyclopentadiene） moiety could effectively improve the crystalline and energy level （HOMO/LUMO） of the corresponding donor-acceptor conjugated polymer, thus remarkably increased the PCE of device. The present review summarizes and analyzes the progress silole- containing congjugated polymer photovoltaic donor materials in the past few years. Some issues to be addressed and hotspots to be further investigated are also presented and discussed.