Modifying titania using the molten-salt-assisted self-assembly process for cadmium selenide-quantum dot-sensitized photoanodes

Simple item page
dc.citation.epage4990en_US
dc.citation.issueNumber8en_US
dc.citation.spage4982en_US
dc.citation.volumeNumber2en_US
dc.contributor.authorYaman, M. Y.en_US
dc.contributor.authorHan, A. S.en_US
dc.contributor.authorBandara, J.en_US
dc.contributor.authorKarakaya, C.en_US
dc.contributor.authorDag, Ö.en_US
dc.date.accessioned2018-04-12T11:08:20Z
dc.date.available2018-04-12T11:08:20Z
dc.date.issued2017en_US
dc.departmentDepartment of Chemistryen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractSensitizing titania with semiconducting quantum dots (QDs) is an important field for the development of third-generation photovoltaics. Many methods have been developed to effectively incorporate QDs over the surface of mesoporous titania, assembled from the 20-25 nm titania nanoparticles. Here, we introduce a molten-salt-assisted self-assembly (MASA) method to fabricate CdSe-modified mesoporous titania photoanodes. A mixture of ethanol, two surfactants (cetyltrimethylammonium bromide and 10-lauryl ether), silica (tetramethyl orthosilicate) or titania source (Ti(OC4H9)4, acid (HNO3), and cadmium nitrate solution was infiltrated into the pores of mesoporous titania (assembled using Degussa 25, P25) and immediately calcined at 450 °C to obtain mesoporous cadmium oxide-silica-titania (meso-CdO-SiO2-P25) or cadmium titanate-titania (meso-CdTiO3-P25) films. The MASA process is a simple method to smoothly coat or fill the pores of titania with mesoporous CdO-SiO2 or CdTiO3 that can be reacted under an H2Se atmosphere to convert cadmium species to CdSe at 100 °C. Etching of the silica films with a very dilute hydrogen fluoride solution produces mesoporous CdSe-titania (meso-CdSe-P25) electrodes. The method is flexible to adjust the CdSe/TiO2 mole ratio over a very broad range in the films. The films were characterized at every stage of the preparation to demonstrate the effectiveness of the method. The electrodes were also tested in a simple two-electrode solar cell to demonstrate the performance of the electrodes that have a power conversion efficiency of 3.35%.en_US
dc.description.provenanceMade available in DSpace on 2018-04-12T11:08:20Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 179475 bytes, checksum: ea0bedeb05ac9ccfb983c327e155f0c2 (MD5) Previous issue date: 2017en
dc.identifier.doi10.1021/acsomega.7b00839en_US
dc.identifier.issn2470-1343
dc.identifier.urihttp://hdl.handle.net/11693/37276
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1021/acsomega.7b00839en_US
dc.source.titleACS Omegaen_US
dc.titleModifying titania using the molten-salt-assisted self-assembly process for cadmium selenide-quantum dot-sensitized photoanodesen_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Modifying Titania Using the Molten-Salt-Assisted Self-Assembly Process for Cadmium Selenide–Quantum Dot-Sensitized Photoanodes.pdf
Size:
4.1 MB
Format:
Adobe Portable Document Format
Description:
Full printable version
Download

Collections

Scholarly Publications - Chemistry
Scholarly Publications - UNAM