Effect of different auxiliary ligands and anchoring ligands on neutral thiocyanate-free ruthenium(II) dyes bearing tetrazole chromophores for dye-sensitized solar cells
作者:Guohua Wu、Ryuji Kaneko、Kosuke Sugawa、Ashraful Islam、Idriss Bedja、Ravindra Kumar Gupta、Liyuan Han、Joe Otsuki
DOI:10.1016/j.dyepig.2017.01.061
日期:2017.5
bistridentate Ru(II) complexes having a combination of ligands, 4,4′-dicarboxy-2,2′:6,2″-terpyridine or its 2-hexylthiophene-substituted derivative as the anchoring ligand on one hand and one of tetrazolylpyridine-based ligands having a NˆNˆN coordination pattern or C−ˆNˆN coordination pattern as the auxiliary ligand on the other are reported as sensitizers for dye-sensitized solar cells (DSSCs), along
四种新的双链Ru(II)配合物,一方面具有配体,4,4'-二羧基-2,2':6,2''-吡啶或其2-己基噻吩取代的衍生物的组合作为锚定配体,据报道,具有NˆNˆN配位图案或C - ˆNˆN配位图案作为辅助配体的基于四唑基吡啶的配体是染料敏化太阳能电池(DSSC)的敏化剂,并具有光谱,电化学和理论特性。对于锚定配体,引入2-己基噻吩单元导致较窄的光谱响应和较低的摩尔消光系数以及较小的染料再生驱动力。对于辅助配体,与Ru相比,环金属化的Ru C键引起吸收红移N键,因此可在高达950 nm的波长下产生光电流。此外,NˆNˆN配合物比C - ˆNesN配合物的DSSC整体效率更高,这主要是由于较高的开路电压(V oc)。总的来说,当在电解质中采用0.5M叔丁基吡啶时,基于双四唑酸酯染料的DSSC在不具有锚定配体的己基噻吩单元并且具有NˆN = N配位图案的情况下显示出最高的效率为5.9%。