文献类型：期刊文献

英文题名：Systematic optimization of the substituents on the phenothiazine donor of doubly strapped porphyrin sensitizers: an efficiency over 11% unassisted by any cosensitizer or coadsorbent

作者：Zeng, Kaiwen[1,2];Tang, Weiqiang[3];Li, Chengjie[1,2];Chen, Yingying[1,2];Zhao, Shuangliang[3];Liu, Qingyun[4];Xie, Yongshu[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem, Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, State Key Lab Chem Engn, Sch Chem Engn, Shanghai 200237, Peoples R China;[4]Shandong Univ Sci & Technol, Coll Chem & Environm Engn, Qingdao, Shandong, Peoples R China

年份：2019

卷号：7

期号：36

起止页码：20854

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20193807459197);WOS:【SCI-EXPANDED(收录号:WOS:000488618600041)】；

基金：This work was financially supported by the NSFC (21772041, 201702062, 21811530005, 21971063, and 21878078), the Program for Professor of Special Appointment (Eastern Scholar, GZ2016006) at Shanghai Institutions of Higher Learning, Shanghai Pujiang Program (17PJ1401700), and the Fundamental Research Funds for the Central Universities (WK1616004 and 222201717003). The authors thank Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterization.

语种：英文

外文关键词：Insecticides - Efficiency - Electrolytes

摘要：Four novel porphyrin dyes XW48-XW51 with a doubly strapped porphyrin framework and judicious optimization of the substituents of the phenothiazine donor have been synthesized and utilized as DSSC dyes. On the basis of XW40, bulky 2,6-bis(hexyloxy) phenyl groups were incorporated into the phenothiazine donor by replacing the hexyl, 4-hexyloxyphenyl and both of them, to afford XW48, XW49 and XW50, respectively. On the basis of XW50, XW51 was synthesized by using 2,4-bis(hexyloxy) phenyl in place of the 2,6-bis(hexyloxy) phenyl units. As a result, the V-oc values were enhanced stepwisely from 730 mV (XW40) to ca. 750 mV (XW48/XW49) and then to 761 mV (XW50). Compared with XW50, XW51 contains a bulky donor with more evenly distributed alkoxyl chains, which tend to form a more compact self-assembled monolayer to impede the penetration of I-3(-). Hence, an extraordinarily high V-oc of 781 mV was achieved for XW51. As a result, the efficiency was dramatically improved to 11.1%, which is the highest efficiency for DSSCs based on an individual sensitizer using the iodine electrolyte, to the best of our knowledge. Furthermore, high efficiencies of 10.1% and 9.7% were also obtained for XW50 and XW51, respectively, based on the cobalt electrolyte.