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Article: Solution-Based Synthesis of Ultrasmall Nb2O5 Nanoparticles for Functional Thin Films in Dye-Sensitized and Perovskite Solar Cells

TitleSolution-Based Synthesis of Ultrasmall Nb2O5 Nanoparticles for Functional Thin Films in Dye-Sensitized and Perovskite Solar Cells
Authors
KeywordsNb2O5 nanoparticles
Dye-sensitized solar cells
Perovskite solar cells
Blocking layers
Quantum size
Issue Date2017
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/electacta
Citation
Electrochimica Acta, 2017, v. 236, p. 131-139 How to Cite?
AbstractA facile and new solution-based synthesis for the preparation of Nb2O5 nanoparticles (NPs) is firstly introduced. Chain-like particles of 30 to 50 nm are synthesized through a hydrolysis reaction using an ethanol-based NbCl5 precursor and H2O2 as a strong oxidizer by UV treatment. A uniform dispersion of ultrasmall Nb2O5 NPs with a quantum size of 2 to 5 nm is further obtained by modifying the procedure with acetic acid as a stabilizer. The resultant Nb2O5 NPs are controllably coated on fluorine-doped tin oxide (FTO) conductive glass through 2-volt electrophoresis. The Nb2O5-coated thin film functioned as an effective blocking layer between a mesoporous TiO2 and FTO; it thereby reduced the recombination at the TiO2/FTO/electrolyte interface in dye-sensitized solar cells. Furthermore, it serves as an ultrathin and compact hole blocking layer in perovskite solar cells, resulting in moderate hysteresis effect and improved photovoltaic efficiency from high-transmittance, low capacitance and low series resistance.
Persistent Identifierhttp://hdl.handle.net/10722/246251
ISSN
2017 Impact Factor: 5.116
2015 SCImago Journal Rankings: 1.391
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorHuang, Y-T-
dc.contributor.authorCheng, R-
dc.contributor.authorZhai, P-
dc.contributor.authorLee, H-
dc.contributor.authorChang, Y-H-
dc.contributor.authorFeng, SPT-
dc.date.accessioned2017-09-18T02:25:11Z-
dc.date.available2017-09-18T02:25:11Z-
dc.date.issued2017-
dc.identifier.citationElectrochimica Acta, 2017, v. 236, p. 131-139-
dc.identifier.issn0013-4686-
dc.identifier.urihttp://hdl.handle.net/10722/246251-
dc.description.abstractA facile and new solution-based synthesis for the preparation of Nb2O5 nanoparticles (NPs) is firstly introduced. Chain-like particles of 30 to 50 nm are synthesized through a hydrolysis reaction using an ethanol-based NbCl5 precursor and H2O2 as a strong oxidizer by UV treatment. A uniform dispersion of ultrasmall Nb2O5 NPs with a quantum size of 2 to 5 nm is further obtained by modifying the procedure with acetic acid as a stabilizer. The resultant Nb2O5 NPs are controllably coated on fluorine-doped tin oxide (FTO) conductive glass through 2-volt electrophoresis. The Nb2O5-coated thin film functioned as an effective blocking layer between a mesoporous TiO2 and FTO; it thereby reduced the recombination at the TiO2/FTO/electrolyte interface in dye-sensitized solar cells. Furthermore, it serves as an ultrathin and compact hole blocking layer in perovskite solar cells, resulting in moderate hysteresis effect and improved photovoltaic efficiency from high-transmittance, low capacitance and low series resistance.-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/electacta-
dc.relation.ispartofElectrochimica Acta-
dc.rightsPosting accepted manuscript (postprint): © <year>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/-
dc.subjectNb2O5 nanoparticles-
dc.subjectDye-sensitized solar cells-
dc.subjectPerovskite solar cells-
dc.subjectBlocking layers-
dc.subjectQuantum size-
dc.titleSolution-Based Synthesis of Ultrasmall Nb2O5 Nanoparticles for Functional Thin Films in Dye-Sensitized and Perovskite Solar Cells-
dc.typeArticle-
dc.identifier.emailZhai, P: zhai1023@HKUCC-COM.hku.hk-
dc.identifier.emailLee, H: hslee611@hku.hk-
dc.identifier.emailFeng, SPT: hpfeng@hku.hk-
dc.identifier.authorityFeng, SPT=rp01533-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.electacta.2017.03.171-
dc.identifier.hkuros279237-
dc.identifier.hkuros288246-
dc.identifier.volume236-
dc.identifier.spage131-
dc.identifier.epage139-
dc.identifier.isiWOS:000401110200015-
dc.publisher.placeUnited Kingdom-

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