Synthesis of graphene-CoS electro-catalytic electrodes for dye sensitized solar cells

Santanu Das; P. Sudhagar; S. Nagarajan; Eisuke Ito; Sang-Yun Lee; Yong Soo Kang; Wonbong Choi

doi:10.1016/j.carbon.2012.06.006

Synthesis of graphene-CoS electro-catalytic electrodes for dye sensitized solar cells

Santanu Das, P. Sudhagar, S. Nagarajan, Eisuke Ito, Sang-Yun Lee, Yong Soo Kang, Wonbong Choi^*

^*Corresponding author for this work

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

131 Citations (Scopus)

Abstract

A large CoS-implanted graphene (G-CoS) film electrode was prepared using chemical vapor deposition followed by successive ionic layer absorption and reaction. HRTEM and AFM show that CoS nanoparticles are uniformly implanted on the graphene film. Furthermore, the G-CoS electro-catalytic electrode is characterized in a dye sensitized solar cells (DSSC) and is found to be highly electro-catalytic towards iodine reduction with low charge transfer resistance (R_ct ∼5.05 Ω cm²) and high exchange current density (J₀∼2.50 mA cm^-2). The improved performance compared to the pristine graphene is attributed to the increased number of active catalytic sites of G-CoS and highly conducting path of graphene. The comprehensive G-CoS synthesis process is a simple and scalable process which can easily adapt for large scale electro-catalytic film fabrication for several other electro-chemical energy harvesting and storage applications.

Original language	English
Pages (from-to)	4815-4821
Number of pages	7
Journal	Carbon
Volume	50
Issue number	13
DOIs	https://doi.org/10.1016/j.carbon.2012.06.006
Publication status	Published - Nov 2012

ASJC Scopus subject areas

General Chemistry
General Materials Science

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10.1016/j.carbon.2012.06.006

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@article{f260bf1802284b1dba6a0e4060c94da7,

title = "Synthesis of graphene-CoS electro-catalytic electrodes for dye sensitized solar cells",

abstract = "A large CoS-implanted graphene (G-CoS) film electrode was prepared using chemical vapor deposition followed by successive ionic layer absorption and reaction. HRTEM and AFM show that CoS nanoparticles are uniformly implanted on the graphene film. Furthermore, the G-CoS electro-catalytic electrode is characterized in a dye sensitized solar cells (DSSC) and is found to be highly electro-catalytic towards iodine reduction with low charge transfer resistance (Rct ∼5.05 Ω cm2) and high exchange current density (J0∼2.50 mA cm-2). The improved performance compared to the pristine graphene is attributed to the increased number of active catalytic sites of G-CoS and highly conducting path of graphene. The comprehensive G-CoS synthesis process is a simple and scalable process which can easily adapt for large scale electro-catalytic film fabrication for several other electro-chemical energy harvesting and storage applications.",

author = "Santanu Das and P. Sudhagar and S. Nagarajan and Eisuke Ito and Sang-Yun Lee and Kang, {Yong Soo} and Wonbong Choi",

note = "Funding Information: This research was, in part, supported by World Class University (WCU) program (R31-2008-000-10092), Engineering Research Center Program (2012-0000591) through Korea Science and Engineering Foundation funded by the Ministry of Education, Science and Technology, Republic of Korea. Das acknowledges DYF Fellowship from Graduate School, Florida international University and support by Korea Electrotechnology Research Institute. ",

year = "2012",

month = nov,

doi = "10.1016/j.carbon.2012.06.006",

language = "English",

volume = "50",

pages = "4815--4821",

journal = "Carbon",

issn = "0008-6223",

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T1 - Synthesis of graphene-CoS electro-catalytic electrodes for dye sensitized solar cells

AU - Das, Santanu

AU - Sudhagar, P.

AU - Nagarajan, S.

AU - Ito, Eisuke

AU - Lee, Sang-Yun

AU - Kang, Yong Soo

AU - Choi, Wonbong

N1 - Funding Information: This research was, in part, supported by World Class University (WCU) program (R31-2008-000-10092), Engineering Research Center Program (2012-0000591) through Korea Science and Engineering Foundation funded by the Ministry of Education, Science and Technology, Republic of Korea. Das acknowledges DYF Fellowship from Graduate School, Florida international University and support by Korea Electrotechnology Research Institute.

PY - 2012/11

Y1 - 2012/11

N2 - A large CoS-implanted graphene (G-CoS) film electrode was prepared using chemical vapor deposition followed by successive ionic layer absorption and reaction. HRTEM and AFM show that CoS nanoparticles are uniformly implanted on the graphene film. Furthermore, the G-CoS electro-catalytic electrode is characterized in a dye sensitized solar cells (DSSC) and is found to be highly electro-catalytic towards iodine reduction with low charge transfer resistance (Rct ∼5.05 Ω cm2) and high exchange current density (J0∼2.50 mA cm-2). The improved performance compared to the pristine graphene is attributed to the increased number of active catalytic sites of G-CoS and highly conducting path of graphene. The comprehensive G-CoS synthesis process is a simple and scalable process which can easily adapt for large scale electro-catalytic film fabrication for several other electro-chemical energy harvesting and storage applications.

AB - A large CoS-implanted graphene (G-CoS) film electrode was prepared using chemical vapor deposition followed by successive ionic layer absorption and reaction. HRTEM and AFM show that CoS nanoparticles are uniformly implanted on the graphene film. Furthermore, the G-CoS electro-catalytic electrode is characterized in a dye sensitized solar cells (DSSC) and is found to be highly electro-catalytic towards iodine reduction with low charge transfer resistance (Rct ∼5.05 Ω cm2) and high exchange current density (J0∼2.50 mA cm-2). The improved performance compared to the pristine graphene is attributed to the increased number of active catalytic sites of G-CoS and highly conducting path of graphene. The comprehensive G-CoS synthesis process is a simple and scalable process which can easily adapt for large scale electro-catalytic film fabrication for several other electro-chemical energy harvesting and storage applications.

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DO - 10.1016/j.carbon.2012.06.006

M3 - Article

AN - SCOPUS:84864468311

SN - 0008-6223

VL - 50

SP - 4815

EP - 4821

JO - Carbon

JF - Carbon

IS - 13

ER -

Synthesis of graphene-CoS electro-catalytic electrodes for dye sensitized solar cells

Abstract

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