One-step electrodeposited CoSe2 nano-reticular with high electroconductivity and electrocatalytic as a counter electrode for dye sensitized solar cell

被引：19

作者：

Guo, Xueyi ^{[1
]}

Xu, Runze ^{[1
]}

Li, Dong ^{[1
]}

Yang, Ying ^{[1
]}

Tian, Qinhua ^{[1
]}

机构：

[1] Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 831卷

基金：

中国国家自然科学基金;

关键词：

Electrodeposition; Cobalt diselenide; Dye-sensitized solar cells; Electrocatalytic; HYDROTHERMAL SYNTHESIS; HYDROGEN EVOLUTION; STABLE ELECTROCATALYST; SELENIDE NANORODS; EFFICIENT; PERFORMANCE; NANOPARTICLES; NANOSHEETS; DEPOSITION; FILMS;

D O I：

10.1016/j.jallcom.2020.154712

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：

Herein, a nano-reticular structure cobalt diselenide (CoSe2) film with high electroconductivity and electrocatalytic has been synthesized by one-step electrodeposition method and is applied as a counter electrode for dye sensitized solar cell (DSSC). Cyclic voltammetry (CV) measurements with different potential windows are carried out to reveal the deposition mechanism of cobalt selenide, illustrating that the formation of CoSe2 occurred at -0.62 V via inductive effect reaction with selenide (Se2-). Tafel and CV characterizations demonstrate an excellent electrocatalytic activity of CoSe2 counter electrode towards I-/I-3(-) reduction reaction, which is attributed to the electronic effect between Co and Se and electrochemical active sites, provided by wrinkled layer structure, for adsorption and reduction of I-3(-). EIS measurements show a great electroconductivity ability of electrodeposition CoSe2 film. The DSSC based on the CoSe2 counter electrode yields a maximum power conversion efficiency of 3.96% (J(sc) = 10.84 mA cm(-2), V-oc = 0.65 V and FF = 55%) under the standard AM 1.5G illumination, which is 1.6 times higher than that of commercial Pt-based DSSC. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：7

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