Triaryl linked donor acceptor dyads for high-performance dye-sensitized solar cells
作者:Yuan Jay Chang、Tahsin J. Chow
DOI:10.1016/j.tet.2009.09.036
日期:2009.11
The effect of changing substituents of organic dyes for their performance on dye-sensitized solar cells (DSSCs) is examined. These dyes consist of an aromatic amine donor group, a cyanoacrylic acid acceptor group, and a triaryl spacer group, while they are linked together by consecutive palladium catalyzed coupling reactions. These materials exhibit strong charge transfer absorption bands in the UV/vis
研究了改变有机染料取代基对其染料敏化太阳能电池(DSSC)的性能的影响。这些染料由芳族胺供体基团,氰基丙烯酸受体基团和三芳基间隔基团组成,它们通过连续的钯催化的偶联反应连接在一起。这些材料在UV / vis区域显示出很强的电荷转移吸收带。通过循环伏安法估算了它们的氧化还原电势水平,发现它们非常适合DSSC中的电荷流。在芳族胺的苯基上添加给电子取代基会增加施主基团上的电子密度,从而降低HOMO / LUMO带隙。这些染料被化学吸附在纳米晶TiO 2的表面上,并通过标准操作将其制作成DSSC。对于典型的设备,最大的单色入射光子-电流转换效率(IPCE)可以达到80%,短路光电流密度(J sc)为16.34 mA cm -2,开路光电压(V oc) 0.68 V,填充因数(FF)0.55,对应于6.05%的总转换效率。