Improved performance of dye-sensitized solar cells with laser-textured nanoporous TiO2 photoanodes
| Autor: | Ming-Yi Pu, Jian Z. Chen |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Materials science
Excimer laser business.industry Nanoporous Open-circuit voltage Mechanical Engineering medicine.medical_treatment Sintering Condensed Matter Physics Laser law.invention Dye-sensitized solar cell Mechanics of Materials law medicine Optoelectronics General Materials Science Irradiation business Porosity |
| Zdroj: | Materials Letters. 66:162-164 |
| ISSN: | 0167-577X |
| Popis: | This study reports the improved performance of dye-sensitized solar cells (DSSCs) with TiO 2 photoanodes textured by a KrF excimer laser. The excimer laser was employed to create texture for the photoanodes after sintering from TiO 2 pastes at 510 °C. The results revealed that the efficiency increased by 24% (from 4.49% to 5.59%) for cells with photoanodes annealed with 11,200 shots of 80 mJ/cm 2 laser irradiation. The porous TiO 2 photoanodes became less transparent after the laser treatment, indicating an increase in light trapping due to a rougher texture. A notable enhancement of light absorption for wavelengths greater than 550 nm was achieved. The open circuit voltage (V oc ) and fill factor (FF) were also improved. The surface re-melting and solidification process may change the series and shunt resistances and reduce the surface recombination centers, leading to the increases of V oc and FF. |
| Databáze: | OpenAIRE |
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