文献类型：期刊文献

英文题名：Comprehensive control of voltage loss enables 11.7% efficient solid-state dye-sensitized solar cells

作者：Zhang, Weiwei[1,2,3];Wu, Yongzhen[1,2];Bahng, Hee Won[4];Cao, Yiming[3];Yi, Chenyi[3];Saygili, Yasemin[5];Luo, Jingshan[3];Liu, Yuhang[3];Kavan, Ladislav[3,6];Moser, Jacques-E.[4];Hagfeldt, Anders[5];Tian, He[1,2];Zakeeruddin, Shaik Mohammed[3];Zhu, Wei-Hong[1,2];Gratzel, Michael[3]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[3]Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photon & Interfaces, CH-1015 Lausanne, Switzerland;[4]Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Photochem Dynam Grp, CH-1015 Lausanne, Switzerland;[5]Ecole Polytech Fed Lausanne, Inst Chem Sci & Engn, Lab Photomol Sci, CH-1015 Lausanne, Switzerland;[6]J Heyrovsky Inst Phys Chem, Prague 18223, Czech Republic

年份：2018

卷号：11

期号：7

起止页码：1779

外文期刊名：ENERGY & ENVIRONMENTAL SCIENCE

收录：;EI(收录号：20183005582252);WOS:【SCI-EXPANDED(收录号:WOS:000438392400013)】；

基金：The authors acknowledge financial support from NSFC for Creative Research Groups (21421004) and Key Project (21636002), NSFC/China, Oriental Scholarship, Fundamental Research Funds for the Central Universities (WJ1416005, WJ1714007). M. G., J.-E. M., H. W. B. acknowledges Swiss National Science Foundation (grant no. 200021-157135/1 and NCCR MUST research instrument) and CTI 17622.1 PFNM-NM, glass2energy SA (g2e), Villaz-St-Pierre, Switzerland. L. K. acknowledges support from the Czech Science Foundation (grant No. 13-07724S). W. W. Z. acknowledges the China Scholarship Council (CSC) for a PhD study fellowship.

语种：英文

外文关键词：Economic and social effects - Open circuit voltage - Energy gap - Efficiency - Photovoltaic effects - Cell engineering

摘要：The relatively large voltage loss (V-loss) in excitonic type solar cells severely limits their power conversion efficiencies (PCEs). Here, we report a comprehensive control of V-loss through efficacious engineering of the sensitizer and redox mediator, making a breakthrough in the PCE of dye-sensitized solar cells (DSSCs). The targeted down-regulation of V-loss is successfully realized by three valid channels: (i) reducing the driving force of electron injection through dye molecular engineering, (ii) decreasing the dye regeneration overpotential through redox mediator engineering, and (iii) suppressing interfacial electron recombination. Significantly, the `` trade-off'' effect between the dye optical band gap and the open-circuit voltage (V-OC) is minimized to a great extent, achieving a distinct enhancement in photovoltaic performance (PCE > 11.5% with V-OC up to 1.1 V) for liquid junction cells. The solidification of the best-performing device leads to a PCE of 11.7%, which is so far the highest efficiency obtained for solid-state DSSCs. Our work inspires further development in highly efficient excitonic solar cells by comprehensive control of V-loss.