Photoelectrochemical Properties of Doubly β-Functionalized Porphyrin Sensitizers for Dye-Sensitized Nanocrystalline-TiO2 Solar Cells
Photoelectrochemical Properties of Doubly β-Functionalized Porphyrin Sensitizers for Dye-Sensitized Nanocrystalline-TiO2 Solar Cells
复制标题
DOI：
10.1021/jp804258q
复制
发表时间：
2008-09
影响因子：
3.7
通讯作者：
Jong Kang Park;H. Lee;Jinping Chen;H. Shinokubo;A. Osuka;Dongho Kim
中科院分区：
文献类型：
--
作者：
Jong Kang Park;H. Lee;Jinping Chen;H. Shinokubo;A. Osuka;Dongho Kim
制备了具有不同羧酸基团的中间位和β位官能化卟啉，以研究染料敏化纳米晶TiO2太阳能电池的电子和光伏特性。卟啉大环核的电子结构与烯属侧链强烈耦合，使得吸收光谱呈现出宽广且红移的Soret和Q带，特别是用丙二酸基团双官能化的卟啉的Soret带高达475 nm。在本研究制备的卟啉衍生物中，2b-bdta-Zn在Soret带区域表现出最大总转换效率3.03%和最大入射光子电流效率60.1%，优于其他衍生物。从这样的光伏性能中，我们可以表明，通过两个 β 位的烯属侧链的多个路径提高了整体电子注入效率，并且卟啉敏化剂和 TiO2 半导体层之间的适度距离是重要的。
Functionalized porphyrins at meso- and β-positions with different carboxylic acid groups were prepared to investigate electronic and photovoltaic properties as dye-sensitized nanocrystalline-TiO2 solar cells. The electronic structures of the porphyrin macrocyclic core are strongly coupled with olefinic side chains so that the absorption spectrum exhibits largely broad and red-shifted Soret and Q-bands, especially up to 475 nm at the Soret band in a porphyrin doubly functionalized with malonic diacid groups. Among porphyrin derivatives prepared in this study, 2b-bdta-Zn exhibits the maximum overall conversion efficiency of 3.03% and the maximum incident photon to current efficiency of 60.1% in the Soret band region, superior to the others. From such photovoltaic performances, we can suggest that multiple pathways through olefinic side chains at two β-positions enhance the overall electron injection efficiency and the moderate distance between the porphyrin sensitizer and the TiO2 semiconductor layer is imp...