Performance enhancement effects of dispersed graphene oxide sponge nanofillers on the liquid electrolytes of dye-sensitized solar cells

被引：6

作者：

Venkatesan, Shanmuganathan ^{[1
]}

Darlim, Elmer Surya ^{[1
]}

Liu, I-Ping ^{[1
]}

Lee, Yuh-Lang ^{[1
,2
]}

机构：

[1] Natl Cheng Kung Univ, Dept Chem Engn, 1 Univ Rd, Tainan 70101, Taiwan

[2] Natl Cheng Kung Univ, Res Ctr Energy Technol & Strategy, 1 Univ Rd, Tainan 70101, Taiwan

来源：

CARBON | 2018年 / 132卷

关键词：

Graphene oxide sponge; Iodide redox couple; Liquid electrolyte; Polyiodides; Dye-sensitized solar cells; OPEN-CIRCUIT VOLTAGE; PHOTOVOLTAIC PERFORMANCE; COUNTER ELECTRODE; CARBON NANOTUBES; COMPOSITE ELECTROLYTE; GEL ELECTROLYTES; REDOX COUPLES; EFFICIENCY; IODIDE; REGENERATION;

D O I：

10.1016/j.carbon.2018.01.089

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：

A graphene oxide sponge (GOS) is prepared and utilized as a nanofiller (NF) of an iodide liquid electrolyte for dye-sensitized solar cell (DSSC) application. The concentration effects of the GOS NFs on the conductivity of the electrolyte, and the performance of the DSSCs are studied. The results indicate that the inclusion of GOS NFs markedly enhances the conductivity of the liquid electrolyte. The electrochemical impendence spectroscopy (EIS) analysis shows that the presence of GOS NFs may increase the recombination resistance (R-ct) at the photoelectrode/electrolyte interface and, furthermore, decreases the charge transfer resistance at the Pt counter electrode/electrolyte interface (R-pt). Therefore, the current density (J(sc)), open circuit potential (V-oc), and fill factor (FF) of the DSSCs can be improved by controlling the concentration of GOS NFs. In this study, the DSSC with 0.50 wt% GOS NFs can achieve the highest energy conversion efficiency of 9.44%, which is higher than that obtained for the corresponding cell without GOS NFs (8.84%). (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：71 / 77

页数：7

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