Development of photovoltaic devices based on highly ordered porphyrin array film as artificial light harvesting antenna

两亲性液晶二嵌段共聚物提供了一个高度有序的圆柱形相分离的纳米结构被用作模板的功能分子，这是区域特异性地引入之间的连接处的亲水性和疏水性链段，在相分离界面的位点特异性排列。嵌段共聚物连接处的卟啉单元在圆柱形界面处聚集，得到类似于天然光捕获天线中的叶绿素阵列的圆形和/或圆柱形卟啉阵列。该共聚物的薄膜产生的光电流比不含卟啉单元的两亲性嵌段共聚物与等量ZnTPP的简单混合物产生的光电流大。

The amphiphilic liquid crystalline diblock copolymer afforded a highly ordered cylindrical phase segregated nanostructure was used as a template for the site-specific arrangement of the functional molecules, which were regio-specifically introduced at the junction between a hydrophilic and a hydrophobic segments, at the phase segregation interface. The porphyrin units at the junction of diblock copolymer were accumulated at the cylindrical interface to give the circular and/or cylindrical porphyrin arrays similar to the chlorophyll arrays in the natural light harvesting antenna. The thin film of this copolymer generated larger photocurrent than that of the simple mixture of amphiphilic diblock copolymer without porphyrin unit with equal amount of ZnTPP.