Lu Yunyue, Liu Qingyun, Luo Jiaxin, Wang Bo, Feng Tong, Zhou Xiaoyi, Liu Xinyu, Xie Yongshu
Key Laboratory for Advanced Materials and Institute of Fine Chemicals, Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry and Molecular Engineering, East China University of Science & Technology, Shanghai, 200237, P.R. China.
College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, P.R. China.
ChemSusChem. 2019 Jun 21;12(12):2802-2809. doi: 10.1002/cssc.201900139. Epub 2019 Apr 11.
A series of new porphyrin dyes (XW42-XW44) containing oligo(ethylene glycol) units have been designed and synthesized. Two triethylene glycol units were introduced into the phenothiazine moiety of XW42, whereas diethylene glycol (DEG) and ethylene glycol chains were introduced to afford XW43 and XW44, respectively. Interestingly, the efficiencies of the DSSCs were clearly dependent on the chain lengths. Among the three dyes, XW42 and XW43 exhibited relatively high open-circuit voltages of 751 and 750 mV, respectively, and XW43 exhibited the highest efficiency of 10.32 % owing to the presence of the DEG chains with suitable lengths and excellent ability to trap Li . Furthermore, through a combined coadsorption and cosensitization approach, the efficiencies were dramatically enhanced. As a result, a highest efficiency of 12.10 % was obtained for the XW43+chenodeoxycholic acid+PT-C6 (a metal-free organic dye) system, which ranks among the highest efficiencies of cells based on the traditional iodine electrolyte.
一系列含有低聚（乙二醇）单元的新型卟啉染料（XW42 - XW44）已被设计并合成。两个三甘醇单元被引入到XW42的吩噻嗪部分，而分别引入二甘醇（DEG）和乙二醇链以得到XW43和XW44。有趣的是，染料敏化太阳能电池（DSSC）的效率明显取决于链长。在这三种染料中，XW42和XW43分别表现出相对较高的开路电压，为751和750 mV，并且由于存在具有合适长度且捕获Li能力优异的DEG链，XW43表现出最高效率10.32 %。此外，通过共吸附和共敏化相结合的方法，效率得到显著提高。结果，对于XW43 + 鹅去氧胆酸 + PT - C6（一种无金属有机染料）体系，获得了12.10 %的最高效率，这在基于传统碘电解质的电池最高效率中名列前茅。
