AI Article Synopsis
- The low internal surface area of anodized TiO(2) nanotube arrays (TNAs) hinders their effectiveness in dye-sensitized solar cells (DSSCs) due to limited dye adsorption and light absorption.
- Water treatment at room temperature was used to modify the geometry of the TNAs, creating a hybrid tube wall structure with improved surface characteristics for better dye-loading and light-harvesting.
- After 2 days of water treatment, the TNAs achieved a power conversion efficiency of 6.06%, a 33% increase compared to conventional TNAs, along with enhanced electron transfer properties, indicating potential for high-efficiency DSSCs.
Article Abstract
The relatively low internal surface area of anodized TiO(2) nanotube arrays (TNAs) limits dye adsorption and light capturing in TNA-based dye-sensitized solar cells (DSSCs). Here, water treatment of as-anodized TNAs at room temperature was used to tailor the geometry of TNA walls in a controllable way, leading to a hybrid tube wall structure with the outer shell in a tubular morphology and the inner surface consisting of small particles. To enable front-side illumination in DSSCs, the TNAs with porous inner walls were transferred to transparent conductive oxide substrates by a self-detaching and transfer technique. The roughened water-treated TNAs show significantly enhanced internal surface area, leading to improved dye-loading and light-harvesting capabilities. Optimized performance was achieved after water treatment for 2 days, with a power conversion efficiency of 6.06%, increased by ∼33% compared to conventional TNAs. Furthermore, the hybrid TNA nanostructure provides excellent electron transfer and recombination characteristics, thus promising for high efficiency DSSCs.
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| http://dx.doi.org/10.1039/c2nr31268a | DOI Listing |
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