Construction of highly crystallized organic/inorganic nanostructures and development as transparent conducting films for photovoltaics

进行了用于构建无ITO高效光伏电池的新型透明导电膜的材料设计和优化。本文研究了锂掺杂氧化锌纳米棒阵列无机透明导电膜的制备、低分子有机染料在氧化锌表面的单分子固定、杂化有机光伏与导电聚合物聚(3-己基噻吩基)(P3HT)的组装与评价。通过电流密度和开路电压的提高，证实了锂掺杂使电池的功率转换效率(PCE)提高了1.5倍。在近红外区引入分子吸收系数大的染料使电流密度增加4倍。不仅设计了氧化锌，还设计了由卟啉/富勒烯和P3HT或氧化钛组成的一维纳米组装，与分散状态相比，成功地形成了高效的载流子通道。

Materials design and optimization of novel transparent conducting film for construction of ITO-free and highly efficient photovoltaic cells have been performed. Preparation of inorganic transparent conducting film made of Li-doped zinc oxide(ZnO) nanorod arrays, single molecular fixation of low-molecular organic dyes on the surface of the ZnO, and assembly and evaluation of hybrid organic photovoltaics in the combination with conducting polymer of poly(3-hexylthiophene)(P3HT) have been investigated. It was confirmed that the Li-doping resulted 1. 5 times improvement of power conversion efficiency(PCE) through the enhancement of the current density and the open circuit voltage. It was also found that introduction of the highly oriented single molecular layer brought doubled open circuit voltage and introduction of the dye with large molecular absorption coefficient in the near infrared region caused 4 times increment of the current density. Not only ZnO, but one-dimensional nanoassemblies composed of porphyrin/fullerene and P3HT or titanium oxide have also been designed and succeeded to form highly efficient carrier pass as compared with that of the dispersed state.