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首页> 外文期刊>Dyes and Pigments >Trans-A(2)B(2) Zn(II) porphyrin dyes with various donor groups and their Co-sensitization for highly efficient dye-sensitized solar cells
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Trans-A(2)B(2) Zn(II) porphyrin dyes with various donor groups and their Co-sensitization for highly efficient dye-sensitized solar cells

机译：Trans-A（2）B（2）Zn（II）卟啉染料，具有各种供体基团及其对高效染料敏化太阳能电池的共敏化

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摘要

We have designed and synthesized four donor-acceptor based trans-A(2)B(2) Zn(II) porphyrin dyes with various donor moieties and phenylcarboxy as acceptor group in three steps. Two strong electron-donating groups (carbazole, phenothiazine, pyrene and bisthiophene) were attached to porphyrin core to enhance the light absorption of dye molecules and phenylcarboxy acted as acceptor group on TiO2 surface. The alkyl chains present in KP-Zn-CBZ and KP-Zn-PTZ dyes are helpful to suppress the aggregation of dyes at the semiconductor surface. The synthetic route of these dyes was facile, high yield and three steps procedure which involved MacDonald condensation followed by hydrolysis and Zn insertion. The absorption and emission bands of all four dyes were broadened and red shifted due to the charge transfer from donor groups to porphyrin moiety. A wide range of power conversion efficiency was shown by dyes and the order of eta was as followed KP-Zn-PTZ (5.48%) KP-Zn-PYR (3.38%) KP-Zn-CBZ (2.64%) KP-Zn-BTP (1.71%). Co-sensitization of porphyrin dyes with N719 dye promoted the complementary absorption in the visible region and put a restriction on dye aggregation also which improved the cell performance. Co-sensitized KP-Zn-PTZ with N719 dye showed the highest PCE efficiency up to 8.80% with a J(SC) = 17.4 mA cm(-2), V-OC = 0.73 V and FF = 70% which was superior to individual co-sensitized Zn(II) porphyrin dyes and N719 dye alone (eta = 7.3%).
机译：我们已经设计和合成了四种基于供体基的Trant-A（2）B（2）Zn（II）卟啉染料，其具有各种供体部分和苯基羧基作为受体基团三个步骤。将两个强电子给予的基团（咔唑，吩噻嗪，芘和体噻吩）连接到卟啉核心上，以增强染料分子的光吸收，苯基羧基作为TiO 2表面上的受体基团。 KP-Zn-CBZ和KP-Zn-PTZ染料中存在的烷基链有助于抑制半导体表面的染料的聚集。这些染料的合成途径是容易性的，高产率和三个步骤，涉及麦克唐纳缩合，然后是水解和Zn插入。由于从供体基团到卟啉部分的电荷转移，所有四个染料的吸收和发射带均扩大和红色移位。染料显示了广泛的功率转换效率，ETA的顺序如KP-Zn-PTZ（5.48％）＆ KP-Zn-Pyr（3.38％）＆ KP-ZN-CBZ（2.64％）＆ KP-Zn-BTP（1.71％）。具有N719染料的卟啉染料的共敏化促进了可见区域中的互补吸收，并对染料聚集进行了限制，其改善了细胞性能。具有N719染料的共同敏化的KP-Zn-PTZ显示出高达8.80％的PCE效率高达8.80％，j（sc）= 17.4 mA cm（-2），V-oc = 0.73 V和FF = 70％优于单独的单独共振Zn（II）卟啉染料和单独的N719染料（ETA = 7.3％）。

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