|Title:||Improved performance of dye-sensitized solar cells with laser-textured nanoporous TiO2 photoanodes||Authors:||Pu M.-Y.
|Keywords:||Laser processing;Porous materials;Solar energy materials||Issue Date:||2012||Journal Volume:||66||Journal Issue:||1||Start page/Pages:||162-164||Source:||Materials Letters||Abstract:||
This study reports the improved performance of dye-sensitized solar cells (DSSCs) with TiO2 photoanodes textured by a KrF excimer laser. The excimer laser was employed to create texture for the photoanodes after sintering from TiO2 pastes at 510 ¢XC. 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/cm2 laser irradiation. The porous TiO2 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 (Voc) 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 Voc and FF. ? 2011 Elsevier B.V.
|Appears in Collections:||應用力學研究所|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.