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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.

SUBMITTER: Hussain S 

PROVIDER: S-EPMC5758823 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature

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Large area growth of MoTe<sub>2</sub> films as high performance counter electrodes for dye-sensitized solar cells.

Hussain Sajjad S   Patil Supriya A SA   Vikraman Dhanasekaran D   Mengal Naveed N   Liu Hailiang H   Song Wooseok W   An Ki-Seok KS   Jeong Sung Hoon SH   Kim Hak-Sung HS   Jung Jongwan J  

Scientific reports 20180108 1

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 (MoTe<sub>2</sub>) 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) resul  ...[more]

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