Effect of donor modification on the photo-physical and photo-voltaic properties of <i>N</i>-alkyl/aryl amine based chromophores
作者:Manoj Jadhav、Jayraj V. Vaghasiya、Dinesh Patil、Saurabh S. Soni、Nagaiyan Sekar
DOI:10.1039/c8nj06196c
日期:——
resistance in electron recombination and longer lifetime of injected electrons. The rigidity of the donor moiety (MD1) results in stabilization of the HOMO energy level, which increases the band gap and shows a decrease in efficiency along with a blue shift in the photophysical properties. N-Alkylation of the donor moiety (MD4–MD6) causes an increase in the molar absorptivity but affects the conjugation and
计划并准备了六种以罗丹宁-3-乙酸为吸电子基团并以N-烷基/芳基胺作为供体基团的推挽式敏化剂(MD1至MD6),以合理化供体变化对吸收/发射性质的影响光子到电流的转换效率(η)。通过1 H-NMR,13 C-NMR,质谱和CHN分析确定所有敏化剂的结构。在九种具有不同极性的溶剂中记录了这些敏化剂的光物理参数,以研究这些染料的溶剂溶变色行为。纳米晶介孔TiO 2基DSSCs是通过采用MD1到MD6。在2.75%至5.06%的范围内获得了总的光子至电流转换效率,其中MD2生色团显示出最高的效率为5.06%。所有效率都与供体部分的结构修饰相关,从而建立了结构与性质的关系。MD2的提高的光功率转换效率是由于其较高的短路电流J sc(12.70 mA),高的电子复合电阻和更长的注入电子寿命。供体部分的刚性(MD1)导致HOMO能级稳定,这增加了带隙并显示出效率的下降以及光物理性质的蓝移。供体基团的N