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

In Yup Jeon; Hong Mo Kim; In Taek Choi; Kimin Lim; Jaejung Ko; Jae Cheon Kim; Hyun Jung Choi; Myung Jong Ju; Jae Joon Lee; Hwan Kyu Kim; Jong Beom Baek

doi:10.1016/j.nanoen.2015.02.037

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

In Yup Jeon, Hong Mo Kim, In Taek Choi, Kimin Lim, Jaejung Ko, Jae Cheon Kim, Hyun Jung Choi, Myung Jong Ju, Jae Joon Lee, Hwan Kyu Kim, Jong Beom Baek

Department of Energy and Materials Engineering

Research output: Contribution to journal › Article › peer-review

83 Scopus citations

Abstract

Edge-selectively halogenated graphene nanoplatelets (XGnPs, X=Cl, Br, and I) were prepared by the mechanochemically driven reaction between graphite and diatomic halogen molecules (Cl₂, Br₂ or I₂). The contents of halogens (Cl, Br, and I) in XGnPs were 3.18, 1.77, and 0.66at%, respectively, by X-ray photoelectron spectroscopy. The XGnPs as counter electrodes (CEs) showed remarkably enhanced electrocatalytic activities toward Co(bpy)33+ 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 0.46Ωcm² at the CE/electrolyte interface. This value is much lower than that of Pt-CE (0.81Ωcm²). 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.

Original language	English
Pages (from-to)	336-345
Number of pages	10
Journal	Nano Energy
Volume	13
DOIs	https://doi.org/10.1016/j.nanoen.2015.02.037
State	Published - 1 Apr 2015

Keywords

Ball-milling
Counter electrode
Dye-sensitized solar cells
Graphene nanoplatelets
Halogenations

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.nanoen.2015.02.037

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title = "High-performance dye-sensitized solar cells using edge-halogenated graphene nanoplatelets as counter electrodes",

abstract = "Edge-selectively halogenated graphene nanoplatelets (XGnPs, X=Cl, Br, and I) were prepared by the mechanochemically driven reaction between graphite and diatomic halogen molecules (Cl2, Br2 or I2). The contents of halogens (Cl, Br, and I) in XGnPs were 3.18, 1.77, and 0.66at%, respectively, by X-ray photoelectron spectroscopy. The XGnPs as counter electrodes (CEs) showed remarkably enhanced electrocatalytic activities toward Co(bpy)33+ reduction reaction in dye-sensitized solar cells (DSSCs) with an excellent electrochemical stability. Amongst XGnPs, IGnP-CE demonstrated the lowest charge-transfer resistance (Rct) of 0.46Ωcm2 at the CE/electrolyte interface. This value is much lower than that of Pt-CE (0.81Ωcm2). 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.",

keywords = "Ball-milling, Counter electrode, Dye-sensitized solar cells, Graphene nanoplatelets, Halogenations",

author = "Jeon, {In Yup} and Kim, {Hong Mo} and Choi, {In Taek} and Kimin Lim and Jaejung Ko and Kim, {Jae Cheon} and Choi, {Hyun Jung} and Ju, {Myung Jong} and Lee, {Jae Joon} and Kim, {Hwan Kyu} and Baek, {Jong Beom}",

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doi = "10.1016/j.nanoen.2015.02.037",

language = "English",

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journal = "Nano Energy",

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TY - JOUR

T1 - High-performance dye-sensitized solar cells using edge-halogenated graphene nanoplatelets as counter electrodes

AU - Jeon, In Yup

AU - Kim, Hong Mo

AU - Choi, In Taek

AU - Lim, Kimin

AU - Ko, Jaejung

AU - Kim, Jae Cheon

AU - Choi, Hyun Jung

AU - Ju, Myung Jong

AU - Lee, Jae Joon

AU - Kim, Hwan Kyu

AU - Baek, Jong Beom

PY - 2015/4/1

Y1 - 2015/4/1

N2 - Edge-selectively halogenated graphene nanoplatelets (XGnPs, X=Cl, Br, and I) were prepared by the mechanochemically driven reaction between graphite and diatomic halogen molecules (Cl2, Br2 or I2). The contents of halogens (Cl, Br, and I) in XGnPs were 3.18, 1.77, and 0.66at%, respectively, by X-ray photoelectron spectroscopy. The XGnPs as counter electrodes (CEs) showed remarkably enhanced electrocatalytic activities toward Co(bpy)33+ reduction reaction in dye-sensitized solar cells (DSSCs) with an excellent electrochemical stability. Amongst XGnPs, IGnP-CE demonstrated the lowest charge-transfer resistance (Rct) of 0.46Ωcm2 at the CE/electrolyte interface. This value is much lower than that of Pt-CE (0.81Ωcm2). 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.

AB - Edge-selectively halogenated graphene nanoplatelets (XGnPs, X=Cl, Br, and I) were prepared by the mechanochemically driven reaction between graphite and diatomic halogen molecules (Cl2, Br2 or I2). The contents of halogens (Cl, Br, and I) in XGnPs were 3.18, 1.77, and 0.66at%, respectively, by X-ray photoelectron spectroscopy. The XGnPs as counter electrodes (CEs) showed remarkably enhanced electrocatalytic activities toward Co(bpy)33+ reduction reaction in dye-sensitized solar cells (DSSCs) with an excellent electrochemical stability. Amongst XGnPs, IGnP-CE demonstrated the lowest charge-transfer resistance (Rct) of 0.46Ωcm2 at the CE/electrolyte interface. This value is much lower than that of Pt-CE (0.81Ωcm2). 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.

KW - Ball-milling

KW - Counter electrode

KW - Dye-sensitized solar cells

KW - Graphene nanoplatelets

KW - Halogenations

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JO - Nano Energy

JF - Nano Energy

ER -

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

Abstract

Keywords

UN SDGs

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