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

被引：55

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

来源：

NANO ENERGY | 2015年 / 12卷

基金：

中国国家自然科学基金;

关键词：

Cu7S4; nanocages; Kirkendall effect; Quantum dot-sensitized solar cells; Counter electrodes; LOW-COST; PERFORMANCE; NANOCRYSTALS; MICROSPHERES; STRATEGY; ARRAYS; PBS;

D O I：

10.1016/j.nanoen.2014.12.026

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

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.

引用

页码：186 / 196

页数：11

共 57 条

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