Silole-spaced triarylamine derivatives as highly efficient organic sensitizers in dye-sensitized solar cells (DSSCs)
作者:Sangwon Ko、Hyunbong Choi、Moon-Sung Kang、Hyonseok Hwang、Heesun Ji、Jinho Kim、Jaejung Ko、Youngjin Kang
DOI:10.1039/b926163j
日期:——
Three new organic dyes that contain the dithienosilole (DTS) moiety as spacer have been synthesized and their photophysical/electrochemical properties, theoretical calculation and dye-sensitized solar cell (DSSC) performance have been investigated. The overall conversion efficiencies for DSSCs based on these dyes range from 6.73 to 7.50%, comparable to a (3–5′-[N,N-bis(9,9-dimethylfluorene-2-yl)phenyl]2,2′-bithiophene-5-yl}-2-cyanoacrylic acid (JK-2)-sensitized device (7.63%), fabricated and measured under the same experimental conditions. The DSSC constructed from one of the three compounds shows a higher open-circuit voltage (VOC) compared to those of the other two dye sensitized solar cells due to an increased electron lifetime (τe) in the conduction band of TiO2.
三种新的有机染料含有二噻吩硅氧烷(DTS)作为间隔物,它们的光物理/电化学性质、理论计算和染料敏化太阳能电池(DSSC)的性能已经过研究。基于这些染料的DSSC的总转换效率为6.73%至7.50%,与在相同实验条件下制造和测量的(3-5′-[N,N-双(9,9-二甲基芴-2-基)苯基]2,2′-联噻吩-5-基}-2-氰基丙烯酸(JK-2)敏化装置(7.63%)相当。由三种化合物之一构建的DSSC显示出更高的开路电压(VOC),这归因于TiO2传导带中电子寿命(τe)的增加。