Controllable Electrochemical Synthesis of Reduced Graphene Oxide Thin-Film Constructed as Efficient Photoanode in Dye-Sensitized Solar Cells
| Autor: | Sharifah Bee Abd Hamid, Chin Wei Lai, Soon Weng Chong |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
reduced graphene oxide electrochemical reduction voltages dye-sensitized solar cells (DSSCs) efficiency Cost effectiveness Oxide Nanotechnology 02 engineering and technology Electrolyte 010402 general chemistry lcsh:Technology 01 natural sciences Article law.invention chemistry.chemical_compound law General Materials Science Graphite Thin film lcsh:Microscopy lcsh:QC120-168.85 lcsh:QH201-278.5 lcsh:T Graphene 021001 nanoscience & nanotechnology Tin oxide 0104 chemical sciences Dye-sensitized solar cell Chemical engineering chemistry lcsh:TA1-2040 lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 |
| Zdroj: | Materials; Volume 9; Issue 2; Pages: 69 Materials, Vol 9, Iss 2, p 69 (2016) Materials |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma9020069 |
| Popis: | A controllable electrochemical synthesis to convert reduced graphene oxide (rGO) from graphite flakes was introduced and investigated in detail. Electrochemical reduction was used to prepare rGO because of its cost effectiveness, environmental friendliness, and ability to produce rGO thin films in industrial scale. This study aimed to determine the optimum applied potential for the electrochemical reduction. An applied voltage of 15 V successfully formed a uniformly coated rGO thin film, which significantly promoted effective electron transfer within dye-sensitized solar cells (DSSCs). Thus, DSSC performance improved. However, rGO thin films formed in voltages below or exceeding 15 V resulted in poor DSSC performance. This behavior was due to poor electron transfer within the rGO thin films caused by poor uniformity. These results revealed that DSSC constructed using 15 V rGO thin film exhibited high efficiency (η = 1.5211%) attributed to its higher surface uniformity than other samples. The addition of natural lemon juice (pH ~ 2.3) to the electrolyte accelerated the deposition and strengthened the adhesion of rGO thin film onto fluorine-doped tin oxide (FTO) glasses. |
| Databáze: | OpenAIRE |
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