作者:Yuan Jay Chang、Tahsin J. Chow
DOI:10.1039/c1jm10107b
日期:——
A new series of organic dyes containing a triarylamine donor group, a triarylene-linked bridging moiety, and a cyanoacrylic acid acceptor group were synthesized through a simple procedure in high yields. A selected set of substituents were added onto the phenyl group ortho to the cyanoacrylic acid in order to examine their influences on the performance of dye-sensitized solar cells (DSSCs). Their photochemical behaviors were examined under AM1.5 solar condition (100 mW cm−2). A typical device made with a compound containing a -CF3 substituent (PSP-CF3) displayed a short-circuit current (Jsc) 15.16 mA cm−2, an open-circuit voltage (Voc) 0.68 V, a fill factor (ff) 0.68, corresponding to an overall conversion efficiency of 7.0% and a maximal monochromatic incident photon-to-current conversion efficiency (IPCE) 78%. Their photophysical and electrochemical properties were analyzed with the aid of a time-dependent density functional theory (TDDFT) model with the B3LYP functional. Their HOMO and LUMO energy levels are verified by both electrochemical measurements and theoretical calculations.
通过简单的程序合成了一系列新的有机染料,这些染料含有一个三芳基胺供体基团、一个三芳基连接桥基和一个氰基丙烯酸受体基团,产量很高。为了研究它们对染料敏化太阳能电池(DSSC)性能的影响,在氰基丙烯酸正交的苯基上添加了一组选定的取代基。在 AM1.5 太阳光条件(100 mW cm-2)下考察了它们的光化学行为。使用含有 -CF3 取代基的化合物(PSP-CF3)制成的典型装置显示出 15.16 mA cm-2 的短路电流(Jsc)、0.68 V 的开路电压(Voc)和 0.68 的填充因子(ff),相当于 7.0% 的整体转换效率和 78% 的最大单色入射光子到电流转换效率(IPCE)。利用 B3LYP 函数的时间相关密度泛函理论(TDDFT)模型分析了它们的光物理和电化学特性。电化学测量和理论计算都验证了它们的 HOMO 和 LUMO 能级。