Development of type-I/type-II hybrid dye sensitizer with both pyridyl group and catechol unit as anchoring group for type-I/type-II dye-sensitized solar cell
作者:Yousuke Ooyama、Kensuke Furue、Toshiaki Enoki、Masahiro Kanda、Yohei Adachi、Joji Ohshita
DOI:10.1039/c6cp06513a
日期:——
hybrid dye sensitizer adsorbed on TiO2 film exhibits a broad photoabsorption band originating from ICT and DTCT characteristics. Here we reveal the photophysical and electrochemical properties of the type-I/type-II hybrid dye sensitizer bearing a pyridyl group and a catechol unit, along with its adsorption modes onto TiO2 film, and its photovoltaic performance in type-I/type-II DSSC, based on optical
已经开发了具有吡啶基和邻苯二酚单元作为锚定基团的I / II型杂化染料敏化剂,并研究了其在染料敏化太阳能电池(DSSC)中的光伏性能。敏化剂具有通过路易斯酸位点的配位键和TiO 2表面上布朗斯台德酸位点的双齿双核桥接键吸附在TiO 2电极上的能力,这使得可以将电子注入到TiO 2的导带中。通过分子内电荷转移(ICT)激发(I型途径)和染料对TiO 2的光激发作用而形成TiO 2电极电荷转移(DTCT)带(II型途径)。发现吸附在TiO 2膜上的I / II型杂化染料敏化剂表现出源自ICT和DTCT特性的宽的光吸收带。在这里,我们揭示了带有吡啶基和邻苯二酚单元的I / II型杂化染料敏化剂的光物理和电化学性质,以及其在TiO 2膜上的吸附模式,以及在I / II型中的光电性能。 II DSSC,基于光(光吸收和荧光光谱)和电化学测定(循环伏安法),密度泛函理论(DFT)计算,该染料的FT-IR光谱吸附的TiO