Hattori Shigeki, Ohkubo Kei, Urano Yasuteru, Sunahara Hisato, Nagano Tetsuo, Wada Yuji, Tkachenko Nikolai V, Lemmetyinen Helge, Fukuzumi Shunichi
Department of Material and Life Science, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
J Phys Chem B. 2005 Aug 18;109(32):15368-75. doi: 10.1021/jp050952x.
Boron dipyrromethene (BODIPY), which is commonly used as an energy absorbing and transferring antenna molecule, has been modified to contain an electron donor moiety, 8-(2,4,5-trimethoxyphenyl)-4,4-difluoro-1,3,5,7-tetramethyl-4-bora-3a,4a-diaza-s-indacene (MEOPHBDP). The photoinduced electron transfer from a 2,4,5-trimethoxyphenyl moiety to a BODIPY moiety of MEOPHBDP in acetonitrile was observed by femtosecond laser flash photolysis measurements. The lifetime of the charge-separated state of MEOPHBDP was 59 ps at 298 K. The dye-sensitized solar cells (DSSC) were prepared using MEOPHBDP with carboxylic acid (MEOPHBDP-COOH) and a reference BODIPY dye having no electron donor moiety. The photovoltaic measurements were performed using a standard two-electrode system consisting of a working electrode and a Pt sputtered electrode in methoxyacetonitrile containing 0.5 M iodide and 0.05 M I(2). The photoelectrochemical properties of DSSC with MEOPHBDP are compared with those with a reference BODIPY dye.
硼二吡咯亚甲基（BODIPY）通常用作能量吸收和转移天线分子，已被修饰为含有电子供体部分，即8-(2,4,5-三甲氧基苯基)-4,4-二氟-1,3,5,7-四甲基-4-硼-3a,4a-二氮杂-s-茚（MEOPHBDP）。通过飞秒激光闪光光解测量观察到在乙腈中从2,4,5-三甲氧基苯基部分到MEOPHBDP的BODIPY部分的光诱导电子转移。在298 K时，MEOPHBDP电荷分离态的寿命为59皮秒。使用带有羧酸的MEOPHBDP（MEOPHBDP-COOH）和没有电子供体部分的参比BODIPY染料制备了染料敏化太阳能电池（DSSC）。使用由工作电极和溅射铂电极组成的标准双电极系统，在含有0.5 M碘化物和0.05 M I₂的甲氧基乙腈中进行光伏测量。将含有MEOPHBDP的DSSC的光电化学性质与参比BODIPY染料的光电化学性质进行了比较。
