文献类型：期刊文献

英文题名：Molecular Engineering of Quinoxaline-Based D-A-π-A Organic Sensitizers: Taking the Merits of a Large and Rigid Auxiliary Acceptor

作者：Jiang, Huiyun[1,2];Wu, Yongzhen[1,2];Islam, Ashraful[3];Wu, Min[4];Zhang, Weiwei[1,2];Shen, Chao[1,2];Zhang, Hao[1,2];Li, Erpeng[1,2];Tian, He[1,2];Zhu, Wei-Hong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Natl Inst Mat Sci, Ctr Green Res Energy & Environm Mat, Photovolta Mat Grp, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan;[4]Univ Gothenburg, Dept Chem & Mol Biol, Phys Chem, S-40530 Gothenburg, Sweden

年份：2018

卷号：10

期号：16

起止页码：13635

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20181805112376);WOS:【SCI-EXPANDED(收录号:WOS:000431150900043)】；

基金：This work was supported by NSFC for Creative Research Groups (21421004), Distinguished Young Scholars (21325625), Key Project (21636002), NSFC/China, the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, Science and Technology Commission of Shanghai Municipality (15XD1501400, 17ZR1407400), and the Fundamental Research Funds for the Central Universities (WJ1416005, WJ1714007).

语种：英文

外文关键词：quinoxaline; D-A-pi-A; auxiliary acceptor; rigidity; indoline dyes

摘要：The continuing efforts of creating novel D-A-pi-A structured organic sensitizers with excellent optoelectronic properties have resulted in substantial improvement of power conversion efficiency (PCE) as well as stability of dye-sensitized solar cells (DSSCs). Here, we report a new molecular engineering strategy for enhancing optical gain and improving excited-state features in D-A-pi-A structured organic sensitizers by the conjugation size and rigidity of the auxiliary acceptor functional group. A series of phenanthrene-fused-quinoxaline (PFQ)-based D-A-pi-A organic sensitizers (WS-82, WS-83, and WS-84) are designed and synthesized for applications in DSSCs. Compared to 2,3-diphenylquinoxaline (DPQ)-based dye IQ-4, PFQ dyes show extended absorption spectra and improved open-circuit voltage perform ance. Upon a systematical engineering of alkyl chains and pi-spacer structure, the unfavorable issues of PFQ dyes including low solubility and high energy barrier charge successfully eliminated. When applied in iodine electrolyte -based DSSCs, the best performing DPQ dye WS-84 shows 10.11%, which is much higher than that of our previous champion DPQ dye IQ-4 under the same conditions.