文献类型：期刊文献

英文题名：Rational design and fabrication of skeletal Cu7S4 nanocages for efficient counter electrode in quantum dot-sensitized solar cells

作者：Chen, Wenlong[1,2];Wang, Min[1,2];Qian, Tianyue[1,2];Cao, Hongliang[3,4];Huang, Shoushuang[1,2];He, Qingquan[1,2];Liang, Na[1,2];Wang, Cheng[5];Zai, Jiantao[1,2]

机构：[1]Shanghai Jiao Tong Univ, Shanghai Electrochem Energy Devices Res Ctr, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;[2]Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China;[3]E China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine, Minist Educ, Shanghai 200237, Peoples R China;[4]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China;[5]Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Changchun 130022, Jilin, Peoples R China

年份：2015

卷号：12

起止页码：186

外文期刊名：NANO ENERGY

收录：;EI(收录号：20150800549825);WOS:【SCI-EXPANDED(收录号:WOS:000354767500022)】；

基金：We acknowledge the Shanghai Nano-Project (12nm0504300), National Natural Science Foundation of China (21371121 and 21331004), Shanghai Chenguang-project (13CG10), Science and Technology Commission of Shanghai Municipality (14DZ2250800), and open funds of SKLMMC of SJTU (mmc-kf14-09) for financial support.

语种：英文

外文关键词：Cu7S4 nanocages; Kirkendall effect; Quantum dot-sensitized solar cells; Counter electrodes

摘要：The widely used brass based Cu2S counter electrodes (CEs) cannot stand the continuing corrosion in polysulfide electrolyte, which has limited the development of quantum dot-sensitized solar cells. Here, skeletal Cu7S4 nanocages (SKE-Cu7S4) with symmetric opening windows were rational designed and synthesized by kinetic roughening processes, and a possible formation mechanism had been proposed. Furthermore, SKE-Cu7S4 onto fluorine-doped tin oxide glass substrates were designed and deposited to function as new efficient, stable and low cost CEs. Thanks to the 3D opening structure of SKE-Cu7S4 CEs, the assembled QDSSCs exhibited a power conversion efficiency of 4.43% under 1 sun (100 mW cm(-2)) irradiation, while those of preformed 18 facet-Cu7S4, Pt and brass/Cu2S CEs are of 3.87%, 1.73% and 3.32%, respectively. Further studies by cyclic voltammetry measurements indicate the SKE-Cu7S4 CEs still remain good cyclability after 600 cycles, demonstrating a super stable capability, while the commonly used brass/Cu2S CEs show obvious fluctuation. (C) 2014 Elsevier Ltd. All rights reserved.