Comparison Between Organic Sensitizers Containing Stilbene and Azo Group as Bridging Unit for Dye Sensitized Solar Cells
作者:Se Woong Park、Jin Woong Namgoong、Il Keun Kwon、Jae Pil Kim
DOI:10.1166/jnn.2014.9554
日期:2014.10.1
While azo dyes have been widely used in dye industry, the azo dyes have been seldom applied as sensitizers to dye sensitized solar cells. In this study, new metal-free organic sensitizers, ST and AZ, which are same structures except bridging units, were synthesized and evaluated. ST containing stilbene as bridging unit gave higher energy conversion efficiency than AZ containing azo group as bridging unit. As a result of density functional theory (DFT) calculations, ST displayed more localized frontier molecular orbitals at lowest unoccupied molecular orbital (LUMO) states than AZ.
虽然偶氮染料在染料工业中得到了广泛的应用,但很少将其作为敏化剂用于染料敏化太阳能电池。在这项研究中,我们合成了两种新的无金属有机敏化剂ST和AZ,这两种物质除了桥连单元外具有相同的结构,并对它们进行了评估。与桥连单元为偶氮基团的AZ相比,桥连单元为二苯乙烯的ST具有更高的能量转换效率。根据密度泛函理论(DFT)计算的结果,ST在最低未占分子轨道(LUMO)态下表现出比AZ更局域的前沿分子轨道。