Molecular engineering on a chlorophyll derivative, chlorin e6, for significantly improved power conversion efficiency in dye-sensitized solar cells
Molecular engineering on a chlorophyll derivative, chlorin e6, for significantly improved power conversion efficiency in dye-sensitized solar cells
复制标题
DOI：
10.1016/j.jpowsour.2013.05.191
复制
发表时间：
2013-11
影响因子：
9.2
通讯作者：
Xiao‐Feng Wang;H. Tamiaki;O. Kitao;T. Ikeuchi;S. Sasaki
中科院分区：
文献类型：
--
作者：
Xiao‐Feng Wang;H. Tamiaki;O. Kitao;T. Ikeuchi;S. Sasaki
这项工作展示了一种策略，以提高光伏性能的一个众所周知的叶绿素衍生物，chlorine 6，与分子工程。通过在氯6的二氢卟酚大环的C15和C17位引入烷基酯取代基，染料敏化太阳能电池的短路光电流（Jsc）、开路光电压（Voc）和太阳能-电转换效率（η）从2.5mA cm-2、0.47 V和0.9%提高到6.6mA cm-2、0.60 V，和2.9%。当Jsc = 15.6 mA cm−2，Voc= 0.65 V，填充因子（FF）= 0.66时，η值进一步提高到6.7%，羧基的重新定位和C3取代基上环状π系统的扩展。这些改进归因于减少了电解质中TiO 2半导体和氧化还原对之间的电荷复合以及增强的电子注入和光捕获效率。
This work demonstrates a strategy to improve the photovoltaic performance of a well-known chlorophyll derivative, chlorine6, with molecular engineering. By introducing alkyl ester substituents at the C15 and C17 positions of the chlorin macrocycle of chlorine6, the short-circuit photocurrent (Jsc), the open-circuit photovoltage (Voc), and the solar energy-to-electricity conversion efficiency (η) of dye-sensitized solar cells were improved from 2.5 mA cm−2, 0.47 V, and 0.9% to 6.6 mA cm−2, 0.60 V, and 2.9%, respectively. Theηvalue was further improved to 6.7% withJsc= 15.6 mA cm−2,Voc= 0.65 V, and fill factor (FF) = 0.66 with relocation of the carboxy group and extension of the cyclicπsystem on the C3-substituent. These improvements were attributed to the reduced charge recombination between the TiO2semiconductor and redox couple in the electrolyte as well as the enhanced electron-injection and light-harvesting efficiencies.