Novel triphenylamine (TPA)-based organic dyes were synthesized and assessed for their performance in dye-sensitized solar cells (DSSCs). In the dyes considered the TPA group and the cyanoacetic acid have the role of electron-donor and -acceptor, respectively, whereas a thienylâfluoro-phenyl-substituted was introduced as Ï-linker to improve the dye performance in DSSCs. Experimental characterizations empasize that the presence of electron withdrawing substituents in the linker close to the electron-acceptor moiety leads to a more efficient intramolecular photoinduced charge transfer. In fact, photovoltaic experiments reveal that the DSSCs based on the thienylâo-fluoro-phenyl substituted dyes yield a better solar-energy-to-electricity conversion efficiency.
合成了新型
三苯胺(
TPA)基有机
染料,并评估其在
染料敏化太阳能电池(DSSCs)中的性能。在所考虑的
染料中,
TPA基团和
氰基
乙酸分别充当电子供体和受体,而引入了
噻吩-
氟苯取代基作为π-链接体,以提高
染料在DSSCs中的性能。实验表征强调了在接近电子受体部分的链接体中存在的电子吸取取代基会导致更高效的分子内光诱导电荷转移。实际上,光伏实验表明,基于
噻吩-o-
氟苯取代
染料的DSSCs具有更好的太阳能到电能的转换效率。