NDLI: Improved electron transfer and plasmonic effect in dye-sensitized solar cells with bi-functional Nb-doped TiO<sub>2</sub>/Ag ternary nanostructures

Content Provider	Royal Society of Chemistry (RSC)
Author	Chi, Won Seok Jeon, Harim Kim, Jong Hak Park, Jung Tae
Copyright Year	2014
Abstract	TiO2 nanoparticles are surface-modified via atom transfer radical polymerization (ATRP) with a hydrophilic poly(oxyethylene)methacrylate (POEM), which can coordinate to the Ag precursor, i.e. silver trifluoromethanesulfonate (AgCF3SO3). Following the reduction of Ag ions, a Nb2O5 doping process and calcination at 450 °C, bi-functional Nb-doped TiO2/Ag ternary nanostructures are generated. The resulting nanostructures are characterized by energy-filtering transmission electron microscopy (EF-TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-visible spectroscopy. The dye-sensitized solar cell (DSSC) based on the Nb-doped TiO2/Ag nanostructure photoanode with a polymerized ionic liquid (PIL) as the solid polymer electrolyte shows an overall energy conversion efficiency (η) of 6.9%, which is much higher than those of neat TiO2 (4.7%) and Nb-doped TiO2 (5.4%). The enhancement of η is mostly due to the increase of current density, attributed to the improved electron transfer properties including electron injection, collection, and plasmonic effects without the negative effects of charge recombination or problems with corrosion. These properties are supported by intensity modulated photocurrent/voltage spectroscopy (IMPS/IMVS) and incident photon-to-electron conversion efficiency (IPCE) measurements.
Starting Page	2718
Ending Page	2729
Page Count	12
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	6
Issue Number	5
Journal	Nanoscale
DOI	10.1039/c3nr05652j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Atom-transfer radical-polymerization Dye-sensitized solar cell Spectroscopy Carrier generation and recombination Calcination Polymer Nanostructure Photoemission spectroscopy Niobium pentoxide ATRP Ionic liquid X-ray crystallography List of pedophile and pederast advocacy organizations Silver trifluoromethanesulfonate Transmission electron microscopy Ultraviolet\u2013visible spectroscopy Photocurrent Electrolyte Corrosion Dopant Hydrophile Electric current X-ray photoelectron spectroscopy
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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