基于二维共轭结构的苯并二噻吩类聚合物光伏材料  

Highly efficient two-dimensional conjugated benzodithiophene-based photovoltaic polymers

作　　者：于润楠 姚惠峰[1] 侯剑辉[1] 

机构地区：[1]北京分子科学国家实验室高分子物理与化学国家重点实验室中国科学院化学研究所,北京100190

出　　处：《中国科学：化学》2016年第10期925-944,共20页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(编号:21325419;51173189;91333204);国家重点基础研究发展计划(编号:2014CB643500)资助项目

摘　　要：为了不断提高聚合物太阳能电池的光电转化效率,研究人员设计并合成了种类众多的给/受体单元来制备共轭聚合物材料.其中,基于苯并[1.2-b:4,5-b′]二噻吩(BDT)单元的聚合物材料在有机太阳能电池器件中取得了十分突出的光电转化效率,显示了巨大的应用前景.相比于柔性侧基(如烷氧基或烷基)取代的BDT单元而言,基于二维共轭结构BDT的共轭聚合物通常有更好的热稳定性,更宽的吸收光谱,较低的HOMO能级以及更高的空穴迁移率,因而表现出更加优异的光伏性能,最近报道的由二维共轭BDT单元共聚物制备的聚合物太阳能电池可以获得10%以上的光电转化效率.本文首先简要介绍了二维共轭结构BDT单元的合成方法,然后总结了近年来基于二维共轭结构BDT单元的共轭聚合物及其在太阳能电池中的应用.In order to improve the photovoltaic properties of polymer solar cells（PSC）,varieties of donor and acceptor units were designed and synthesized to construct the highly efficient conjugated polymers.Recent years,materials based on benzo[1.2-b：4,5-b＇]dithiophene（BDT） units have showed promising applications in the field of organic photovoltaics for its excellent properties.As compared to BDT-based polymers with flexible side chains,polymers based on two-dimensional conjugated BDT（2D-BDT） usually had better thermal stability,slightly red-shifted of absorption spectra,lower HOMO levels,higher hole mobility and consequently improved photovoltaic properties.By using novel 2D-BDT-based polymers,the power conversion efficiency（PCE） of the PSC devices has been boosted to over 10%.In this article,we first briefly introduce the synthesis methods of 2D-BDT unit,and then focus our attention to summarize the numerous of 2D-BDT-based polymers and their applications in highly efficient PSC devices.

关 键 词：聚合物太阳能电池 窄带隙聚合物 苯并二噻吩 二维共轭 

分 类 号：O633.5[理学—高分子化学] TM914.4[理学—化学]