High-performance dye-sensitized solar cells using edge-halogenated graphene nanoplatelets as counter electrodes

被引：78

作者：

Jeon, In-Yup ^{[4
]}

Kim, Hong Mo ^{[1
]}

Choi, In Taek ^{[1
]}

Lim, Kimin ^{[2
]}

Ko, Jaejung ^{[2
]}

Kim, Jae Cheon ^{[3
]}

Choi, Hyun-Jung ^{[4
]}

Ju, Myung Jong ^{[1
]}

Lee, Jae-Joon ^{[3
]}

Kim, Hwan Kyu ^{[1
]}

Baek, Jong-Beom ^{[4
]}

机构：

[1] Korea Univ, Dept Adv Mat Chem, Global GET Future Lab, Sejong 339700, South Korea

[2] Korea Univ, Dept Adv Mat Chem, Sejong 339700, South Korea

[3] Konkuk Univ, Nanotechnol Res Ctr, Dept Appl Life Sci, Coll Biomed & Hlth Sci, Chungju 380701, South Korea

[4] UNIST, Sch Energy Engn, Low Dimens Carbon Mat Ctr, Ulsan 689798, South Korea

来源：

NANO ENERGY | 2015年 / 13卷

关键词：

Ball-milling; Halogenations; Graohene nanoolatelets; Dye-sensitized solar cells; Counter electrode; PHOSPHORUS-DOPED GRAPHENE; OXYGEN REDUCTION REACTION; FUNCTIONALIZED GRAPHENE; RAMAN-SPECTROSCOPY; ENERGY-CONVERSION; GRAPHITE OXIDE; LOW-COST; CARBON; EFFICIENCY; CATALYST;

D O I：

10.1016/j.nanoen.2015.02.037

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：

Edge-selectively halogenated graphene nanoplatelets (XGnPs, X=C1, Br, and I) were prepared by the mechanochemically driven reaction between graphite and diatomic halogen molecules (Cl-2, Br-2 or 12). The contents of halogens (Cl, Br, and I) in XGnPs were 3.18, 1.77, and 0.66 at%, respectively, by X-ray photoelectron spectroscopy. The XGnPs as counter electrodes (CEs) showed remarkably enhanced electrocatalytic activities toward Co(bpy)(3)(3+) reduction reaction in dye-sensitized solar cells (DSSCs) with an excellent electrochemical stability. Amongst XGnPs, IGnP-CE demonstrated the lowest charge-transfer resistance (R-ct of 0.46 Omega cm(2) at the CE/electrolyte interface. This value is much lower than that of Pt-CE (0.81 Omega cm(2)). In addition, the DSSC with IGnP-CE had the highest fill factor (71.3%) and cell efficiency (10.31%), whereas those of DSSCs with Pt-CE were only 70.6% and 9.92%, respectively. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：336 / 345

页数：10

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