α-MoO3-C composite as counter electrode for quantum dot sensitized solar cells
| Autor: | Inamuddin, Vishal S. Kadam, M. B. Rajendra Prasad, Parvin S. Tamboli, Habib M. Pathan, Smita Mahajan, R. S. Vhatkar |
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| Rok vydání: | 2017 |
| Předmět: |
Photocurrent
Auxiliary electrode Materials science Working electrode Renewable Energy Sustainability and the Environment Energy conversion efficiency Inorganic chemistry Composite number 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Chemical engineering Electrode 0210 nano-technology |
| Zdroj: | Solar Energy Materials and Solar Cells. 161:96-101 |
| ISSN: | 0927-0248 |
| DOI: | 10.1016/j.solmat.2016.11.035 |
| Popis: | Counter electrodes plays a vital role in electron transport in operation of QDSSCs. The lower charge transfer resistance at counter electrode - electrolyte interface fecilitates improvement in photoconversion efficiency. The present study describes a novel and facile Spray Pyrolysis method for fabrication of low cost α-MoO3-Carbon composite (α-MoO3–C) material which is used as counter electrode (CE) in QDSSCs. The QDSSC with TiO2 photoanode sensitized by cadmium sulphide (CdS) QDs and polysulfide as electrolyte and α-MoO3-C composite as counter electrode exhibited solar energy-to-electricity conversion efficiency of 1.29%, which is better than those of the cells that used platinum and Cu2S as counter electrodes. QDSSCs with α-MoO3-C composite used as counter electrode gives stable and reproducible performance. The improvement in efficiency with α-MoO3-C composite Counter electrode was mainly driven by the improvement in photocurrent density and decrease in charge transfer resistance at counter electrode – electrolyte interface. Electrochemical impedence spectroscopy studies are carried out to understand electron transport in the device at various interfaces. α-MoO3-C composite has shown more electrocatalytic response for the reduction of redox species of the polysulfide than platinum and Cu2S. |
| Databáze: | OpenAIRE |
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