Large area growth of MoTe2 films as high performance counter electrodes for dye-sensitized solar cells

Sajjad Hussain; Supriya A. Patil; Dhanasekaran Vikraman; Naveed Mengal; Hailiang Liu; Wooseok Song; Ki Seok An; Sung Hoon Jeong; Hak Sung Kim; Jongwan Jung

doi:10.1038/s41598-017-18067-6

Large area growth of MoTe₂ films as high performance counter electrodes for dye-sensitized solar cells

Sajjad Hussain, Supriya A. Patil, Dhanasekaran Vikraman, Naveed Mengal, Hailiang Liu, Wooseok Song, Ki Seok An, Sung Hoon Jeong, Hak Sung Kim, Jongwan Jung

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Abstract

A cost effective and efficient alternative counter electrode (CE) to replace commercially existing platinum (Pt)-based CEs for dye-sensitized solar cells (DSSCs) is necessary to make DSSCs competitive. Herein, we report the large-Area growth of molybdenum telluride (MoTe₂) thin films by sputtering-chemical vapor deposition (CVD) on conductive glass substrates for Pt-free CEs of DSSCs. Cyclic voltammetry (CV), Tafel curve analysis, and electrochemical impedance spectroscopy (EIS) results showed that the as-synthesized MoTe₂ exhibited good electrocatalytic properties and a low charge transfer resistance at the electrolyte-electrode interface. The optimized MoTe₂ CE revealed a high power conversion efficiency of 7.25% under a simulated solar illumination of 100 mW cm^-2 (AM 1.5), which was comparable to the 8.15% observed for a DSSC with a Pt CE. The low cost and good electrocatalytic properties of MoTe₂ thin films make them as an alternative CE for DSSCs.

Original language	English
Article number	29
Journal	Scientific Reports
Volume	8
Issue number	1
DOIs	https://doi.org/10.1038/s41598-017-18067-6
State	Published - 1 Dec 2018

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title = "Large area growth of MoTe2 films as high performance counter electrodes for dye-sensitized solar cells",

abstract = "A cost effective and efficient alternative counter electrode (CE) to replace commercially existing platinum (Pt)-based CEs for dye-sensitized solar cells (DSSCs) is necessary to make DSSCs competitive. Herein, we report the large-Area growth of molybdenum telluride (MoTe2) thin films by sputtering-chemical vapor deposition (CVD) on conductive glass substrates for Pt-free CEs of DSSCs. Cyclic voltammetry (CV), Tafel curve analysis, and electrochemical impedance spectroscopy (EIS) results showed that the as-synthesized MoTe2 exhibited good electrocatalytic properties and a low charge transfer resistance at the electrolyte-electrode interface. The optimized MoTe2 CE revealed a high power conversion efficiency of 7.25% under a simulated solar illumination of 100 mW cm-2 (AM 1.5), which was comparable to the 8.15% observed for a DSSC with a Pt CE. The low cost and good electrocatalytic properties of MoTe2 thin films make them as an alternative CE for DSSCs.",

author = "Sajjad Hussain and Patil, {Supriya A.} and Dhanasekaran Vikraman and Naveed Mengal and Hailiang Liu and Wooseok Song and An, {Ki Seok} and Jeong, {Sung Hoon} and Kim, {Hak Sung} and Jongwan Jung",

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doi = "10.1038/s41598-017-18067-6",

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AU - Hussain, Sajjad

AU - Patil, Supriya A.

AU - Vikraman, Dhanasekaran

AU - Mengal, Naveed

AU - Liu, Hailiang

AU - Song, Wooseok

AU - An, Ki Seok

AU - Jeong, Sung Hoon

AU - Kim, Hak Sung

AU - Jung, Jongwan

PY - 2018/12/1

Y1 - 2018/12/1

N2 - A cost effective and efficient alternative counter electrode (CE) to replace commercially existing platinum (Pt)-based CEs for dye-sensitized solar cells (DSSCs) is necessary to make DSSCs competitive. Herein, we report the large-Area growth of molybdenum telluride (MoTe2) thin films by sputtering-chemical vapor deposition (CVD) on conductive glass substrates for Pt-free CEs of DSSCs. Cyclic voltammetry (CV), Tafel curve analysis, and electrochemical impedance spectroscopy (EIS) results showed that the as-synthesized MoTe2 exhibited good electrocatalytic properties and a low charge transfer resistance at the electrolyte-electrode interface. The optimized MoTe2 CE revealed a high power conversion efficiency of 7.25% under a simulated solar illumination of 100 mW cm-2 (AM 1.5), which was comparable to the 8.15% observed for a DSSC with a Pt CE. The low cost and good electrocatalytic properties of MoTe2 thin films make them as an alternative CE for DSSCs.

AB - A cost effective and efficient alternative counter electrode (CE) to replace commercially existing platinum (Pt)-based CEs for dye-sensitized solar cells (DSSCs) is necessary to make DSSCs competitive. Herein, we report the large-Area growth of molybdenum telluride (MoTe2) thin films by sputtering-chemical vapor deposition (CVD) on conductive glass substrates for Pt-free CEs of DSSCs. Cyclic voltammetry (CV), Tafel curve analysis, and electrochemical impedance spectroscopy (EIS) results showed that the as-synthesized MoTe2 exhibited good electrocatalytic properties and a low charge transfer resistance at the electrolyte-electrode interface. The optimized MoTe2 CE revealed a high power conversion efficiency of 7.25% under a simulated solar illumination of 100 mW cm-2 (AM 1.5), which was comparable to the 8.15% observed for a DSSC with a Pt CE. The low cost and good electrocatalytic properties of MoTe2 thin films make them as an alternative CE for DSSCs.

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Large area growth of MoTe₂ films as high performance counter electrodes for dye-sensitized solar cells

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