期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 21, 期 44, 页码 17872-17880出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1jm10675a
关键词
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资金
- National Research Foundation (NRF)
- Korean government (MEST) through the Active Polymer Center for Pattern Integration [R11-2007-050-00000-0]
- Pioneer Research Center [200805103]
- Korea Center for Artificial Photosynthesis (KCAP) at Sogang University [NRF-2009-C1AAA001-2009-0093879]
- National Research Foundation of Korea [2009-0093883, 과C6A1905, 2011-0002123, 2007-0056571] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
TiO2 nanoparticles with anatase/rutile mixed phase and <100 nm in size were surface-modified using hydroxyethyl methacrylate (HEMA) and sulfosuccinic acid (SA), which can coordinate to the TiO2 precursor, titanium(IV) isopropoxide (TTIP). The HEMA in TiO2-HEMA nanoparticles underwent a graft/crosslink polymerization to poly(hydroxyethyl methacrylate) (PHEMA), i.e. TiO2-PHEMA. Following the application of a sol-gel process with TTIP, 3-dimensional (3D) nanostructured TiO2 photoelectrodes with interconnectivity, large surface area and bimodal pores were successfully obtained. The energy conversion efficiency of a polymer electrolyte dye-sensitized solar cell (DSSC) fabricated with TiO2-PHEMA/TTIP photoelectrode reached 3.5% at 100 mW cm(-2), which was much higher than those of pristine TiO2 (1.4%), TiO2/TTIP (1.6%) and TiO2-HEMA/TTIP (2.0%) photoelectrodes. The higher cell performance of TiO2-PHEMA/TTIP is due to enhanced light harvesting, reduced charge recombination and excellent penetration of polymer electrolytes into the TiO2 pores.
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