Titanium-dioxide nanostructures grown by dual DC/HiPIMS for dye-sensitized solar cell applications

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dc.contributor.authorGrigorov K.
dc.contributor.authorLibardi J.
dc.contributor.authorMoraes R.
dc.contributor.authorda Silva Sobrinho A.S.
dc.contributor.authorOliveira M.S.
dc.contributor.authorLeite D.M.G.
dc.contributor.authorMassic M.
dc.date.accessioned2024-03-12T23:46:03Z
dc.date.available2024-03-12T23:46:03Z
dc.date.issued2020
dc.description.abstract© 2020 Universidade Federal de Sao Carlos. All rights reserved.This work reports how the solar conversion efficiency of dye-sensitized solar cells (DSSCs) depends on the crystalline structure of both the compact TiO2 blocking layer (BL) and homoepitaxially grown porous TiO2 mesoporous structure. The films were grown by simultaneous sputtering of titanium targets by DC magnetron and by high-power impulse magnetron systems (HiPIMS). The deposition conditions were managed to produce in situ dense BLs and porous TiO2 films. The only variable was the polarization of the BLs (0 to -200V). The polarization caused phase transformations from pure anatase phase through rutile-anatase mixed phases to rutile phase. The polarization results in decreasing intensity of the anatase (101) peak of the porous layers. The latter promptly decreased linearly the value of the short-current Isc and exponentially the open-circuit voltage Voc of the cells. Another inference is the surface energy of the BLs, which follows an exponential decay as a function of the film polarization. XPS study of the Ti 2p3/2 – Ti 2p1/2 doublet reveals an appearance of a shake-up satellite, whose area exponentially decreases as the polarization potential rises. This phenomenon is discussed and related with other physical aspects of the homo-epitaxially grown films with different texture. The anatase phase content and its purity predefined by the experimental conditions determine the quality of the DSSC, as well as other components such as the dye type, the electrolyte, and the electrode materials.
dc.description.issuenumber5
dc.description.volume23
dc.identifier.doi10.1590/1980-5373-MR-2020-0218
dc.identifier.issn1980-5373
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/34873
dc.relation.ispartofMaterials Research
dc.rightsAcesso Aberto
dc.subject.otherlanguageBlocking layer
dc.subject.otherlanguageDSSC
dc.subject.otherlanguageHiPIMS
dc.subject.otherlanguageSolar cell efficiency
dc.subject.otherlanguageSurface energy
dc.subject.otherlanguageTitanium dioxide
dc.subject.otherlanguageXPS
dc.titleTitanium-dioxide nanostructures grown by dual DC/HiPIMS for dye-sensitized solar cell applications
dc.typeArtigo
local.scopus.citations1
local.scopus.eid2-s2.0-85097300540
local.scopus.subjectCrystalline structure
local.scopus.subjectDeposition conditions
local.scopus.subjectElectrode material
local.scopus.subjectExperimental conditions
local.scopus.subjectMesoporous structures
local.scopus.subjectPolarization potential
local.scopus.subjectShake-up satellite
local.scopus.subjectSolar conversion efficiencies
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85097300540&origin=inward
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