Metal-free efficient dye-sensitized solar cells based on thioalkylated bithiophenyl organic dyes
作者:Fang-Sian Lin、Pragya Priyanka、Miao-Syuan Fan、Sureshraju Vegiraju、Jen-Shyang Ni、Yi-Ching Wu、Yi-Hsien Li、Gene-Hsiang Lee、Yamuna Ezhumalai、Ru-Jong Jeng、Ming-Chou Chen、Kuo-Chuan Ho
DOI:10.1039/d0tc02310h
日期:——
A series of new metal-free organic dyes based on 3,3′-dithioalkyl-2,2′-bithiophene (SBT) organic chromophores was synthesized for use in dye-sensitized solar cells (DSSCs). Because S(alkyl)⋯S(thiophene) intermolecular interlocking renders the twist angle in the structure as <1°, the SBT core is almost flat, as evidenced by the single crystal, optical, and electrochemical data. Through structural modification
合成了一系列基于3,3'-二硫代烷基-2,2'-联噻吩(SBT)有机生色团的新型无金属有机染料,用于染料敏化太阳能电池(DSSC)。由于S(烷基)⋯S(噻吩)的分子间互锁使结构中的扭曲角小于1°,因此SBT核几乎是平坦的,如单晶,光学和电化学数据所示。通过对具有不同烷基链和共轭噻吩单元的SBTπ-接头进行结构修饰,可以抑制显着的生色团聚集和界面电荷重组。在所有合成染料中,优化的染料(消光系数高,为1.3×10 4 cm -1 M -1在497 nm波长下)和共吸附的鹅去氧胆酸(CDCA)在1个阳光下(AM 1.5 G,100 mW cm -2)达到了9.46%的功率转换效率(η)。在1个阳光下进行1000小时的测试后,用这种染料和共吸附剂CDCA制成的太阳能电池仍保持其初始效率的88%,而用N719染料制成的电池为69%。此外,当在2400勒克斯的T5荧光灯下测试时,该染料与CDCA的η为12