Doubly open-ended TiO2 nanotube arrays decorated with a few nm-sized TiO2 nanoparticles for highly efficient dye-sensitized solar cells
SCIE
SCOPUS
- Title
- Doubly open-ended TiO2 nanotube arrays decorated with a few nm-sized TiO2 nanoparticles for highly efficient dye-sensitized solar cells
- Authors
- Jongmin Choi; Young Soo Kwon; Park, T
- Date Issued
- 2014-07
- Publisher
- Royal Society of Chemistry
- Abstract
- Doubly open-ended TiO2 nanotube (NT) arrays decorated with a few nm-sized TiO2 nanoparticles (sNP@NT hybrid structure) were prepared and used as charge-collecting photoelectrodes in dye-sensitized solar cells (DSCs). The TiO2 nanoparticles (NPs) on the NT array surfaces increased the dye loading on the sNP@NT-based DSCs by 9% compared to the undecorated NT-based DSCs, thereby enhancing the light harvesting capabilities. The power conversion efficiency (PCE) of the sNP@NT-based DSC prepared with 11 mu m thick NT arrays was 10.0%, which constituted a 47% improvement over the corresponding NT-based DSCs (which displayed a 6.8% PCE). Despite having a dye loading level that was 22% lower than the dye loading level in the conventional TiO2 NP-based DSCs, due to the limited internal surface area, the PCE of the sNP@NT-based DSC was 28% greater than that of the conventional TiO2 NP-based DSC (8.1% PCE) prepared with a light scattering layer. The high charge collection efficiency of the NT array and the good photovoltaic performance set a new record for efficiency among NT-based DSCs.
- Keywords
- NANOCRYSTALLINE TIO2; TRANSPORT; RECOMBINATION; ELECTROLYTE; FABRICATION; LENGTH
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/13296
- DOI
- 10.1039/C4TA02360A
- ISSN
- 2050-7488
- Article Type
- Article
- Citation
- Journal of Materials Chemistry A, vol. 2, no. 35, page. 14380 - 14385, 2014-07
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