搜档网

搜档网

当前位置:搜档网 > ed Single-Crystal Rutile TiO2 Nanowires

ed Single-Crystal Rutile TiO2 Nanowires

ed Single-Crystal Rutile TiO2 Nanowires

SolarCellsDOI:10.1002/anie.201108076RapidChargeTransportinDye-SensitizedSolarCellsMadefromVerticallyAlignedSingle-CrystalRutileTiO2Nanowires**

XinjianFeng,KaiZhu,ArthurJ.Frank,CraigA.Grimes,andThomasE.Mallouk*

Overthepasttwodecades,dye-andquantumdot-sensitizedTiO2areattractiveforsolarcellandotheroptoelectronicsolarcellsandpolymer/inorganichybridsolarcellshaveapplications.

emergedaspromisingalternativestosolid-statep-njunctionFigure1a,bshow,respectively,cross-sectionalfield-emis-cellsforaddressingtheurgentneedforinexpensive,efficientsionscanningelectronmicroscope(FE-SEM;JEOL6300)solarpower.[1]Attheheartofthesesolarcellsisamesoporousimagestakenatlowandhighmagnification,whichshowTiO2nanoparticle(NP)electrode,whichnotonlyprovides

ahighsurfaceareaforaccommodatingthelight-absorbing

sensitizerbutalsoservesasthestableconductorforphoto-

generatedelectrons.Fastchargetransportinthenetworkis

essentialforeffectivechargecollection,particularlyinsolid-

statecellsinwhichrecombinationisveryfast.[2]Toincrease

theelectronmobility,TiO21Dpolycrystallinenanotube

arrays[3]andsingle-crystallinenanowire(NW)arrays[4,5]

haverecentlybeenproposedandstudiedaselectrode

materialsforsolarcells.However,thereislittleexperimental

evidenceofsubstantiallyenhancedelectrontransportinthese

TiO21Dnanostructure-basedsolarcells.Forexample,thereis

nosubstantialdifferenceinelectrontransportbetween1D

TiO2nanotubeandNP-baseddye-sensitizedsolarcells

(DSSCs).[3c]

Herein,wereportaketone–HClsolvothermalprocessfor

thegrowthofsingle-crystalrutileTiO2NWarraysonF-doped

tinoxide(FTO)substrates.TheTiO2NWsbegintogrow

within15minandlengthsupto10mmcanbeobtainedwithin

http://www.sodocs.net/doc/d09726c4650e52ea541898b7.html ingtheseNWfilms,weshowforthefirsttimethattheFigure1.aandb)FE-SEMcross-sectionalimagesofNWarraysonelectrondiffusioncoefficientofsingle-crystalrutileTiOFTO-coatedglasssubstrateatlowandhighmagnifications,respec-

2NWs

ismorethantwoordersofmagnitudehigherthanthatoftively.c)HR-TEMimageoftheas-synthesizedsingleNW.

rutileNPfilmsatthesamephotoelectrondensity.Inlightof

thefindingsreportedhere,arraysof1Dsingle-crystalrutile

arraysofuniformandwell-separatedNWs.NWsgrow

verticallyfromthesubstratetoanaveragelengthofabout

1.6mmandadiameterof40nmduringareactiontimeof[*]Dr.X.Feng,[+]Prof.C.A.Grimes,Prof.T.E.Mallouk

DepartmentofChemistry,MaterialsResearchInstitute30min.FromthegrazingangleX-raydiffraction(GAXRD)ThePennsylvaniaStateUniversitypatterns(FigureS1intheSupportingInformation),theUniversityPark,PA16802(USA)crystalphaseofthethinbaselayerandnanowirearraysE-mail:tem5@psu.eduwereidentifiedastetragonalrutile(JCPDSfilenumber21-Dr.K.Zhu,[+]Dr.A.J.Frank1276).High-resolutiontransmissionelectronmicroscopeNationalRenewableEnergyLaboratory(HR-TEM)images(Figure1c)confirmthattheNWsare1617ColeBoulevard,Golden,CO80401(USA)singlecrystallineandhavea(110)interplanardistanceof

[+]Theseauthorscontributedequallytothiswork.0.327nm.TheNWsgrowwithapreferred[001]orientation.

[**]WorkatPennStatewassupportedbytheU.S.DepartmentofThelengthofNWsincreasesalmostlinearlywiththereaction

Energy,OfficeofScience,OfficeofBasicEnergySciencesundertime.Forexample,growthof15minresultsinaround260nmgrantnumberDE-SC0001087.WorkatNRELwassupportedbythe

U.S.DepartmentofEnergy,undergrantnumberDEAC36-longNWsandatwohourreactiongivesaround9.6mmlong

08GO28308.ThePennStateNanofabricationfacilityissupportedNWs(seeFigureS2intheSupportingInformation).TheNWbytheNationalScienceFoundationundergrantnumberECS-lengthcanalsobeadjustedbyusingdifferentamountsof0335765.WewouldliketothankDr.BangzhiLiuatthePennStateprecursor.Forexample,forareactiontemperatureof2008CNanofabricationfacilityforhishelpwithFE-SEM,TEM,andHR-andadurationof45minNWswithlengthsofaround1.1andTEM

ed Single-Crystal Rutile TiO2 Nanowires

analyses.around4.4mmcanbeobtainedbyusing0.4and0.8mLofSupportinginformationforthisarticleisavailableontheWWWtetrabutyltitanate,respectively(seeFigureS3intheSupport-underhttp://www.sodocs.net/doc/d09726c4650e52ea541898b7.html /10.1002/anie.201108076.

ed Single-Crystal Rutile TiO2 Nanowires

ing

ed Single-Crystal Rutile TiO2 Nanowires

Information).

Angew.Chem.Int.Ed.2012,51,2727–2730 2012Wiley-VCHVerlagGmbH&Co.KGaA,Weinheim2727

TOP相关主题

【Nano2014.3.14】Oriented Assembled TiO 2 Hierarchical Nanowire Arrays with Fast
one-dimensional (1D) single-crystal rutile TiO2 nanowire (NW) arrays have...Ed. 2013, 52, 7372. (b) Walter, M. G.; Warren, E. L.; Mckone,...
Hydrothermal synthesis of ordered single-crystalline rutile TiO2 nanorod arrays
Hydrothermal synthesis of ordered single-crystalline rutile TiO2 nanorod arrays...Ed. 43, 3666 ?2004?. 10 K. Q. Peng, X. Wang, X. Wu, and S. ...
Rutile TiO2 Microspheres with Exposed Nano-Acicular Single Crystals for Dye-Sensitized Solar Cel
Rutile TiO2 Microspheres with Exposed Nano-Acicular Single Crystals for Dye-Sensitized Solar Cel_专业资料。 今日推荐 68份文档 ...
Facile synthesis and visible photocatalytic activity of single-crystal TiO2PbTiO3 heterostructured
To prepare mesoporous rutile TiO2 single crystal with different exposed {111}...(SEM) images that the porous samples exhib‐ ited a very similar ...
TiO2纳米线的合成和应用
single-crystal TiO2PbTiO3 heterostructured_化学_自然...(3.0 eV for rutile and 3.2 eV for anatase)6...Ed., 2012, 51, 12410–12412. 13 W. K. Ho...
CdSe nanocrystal-TiO2 nanowire
[11] successfully prepared rutile TiO2 nanowhiskers...Samples for SEM observation were presputtered with...The growth of single-crystalline TiO2 nanowires in...
Control of Recombination Pathways in TiO2 Nanowire Hybrid Solar Cells Using Sn4+ Dopants
Single-crystalline TiO2 nanowires were prepared on ...ed in the XRD patterns probably due to the ...The TiO2 seed layer can be crystalline rutile ...
Anisotropy in the Electrical Conductivity of Rutile TiO2 in the (110) Plane
ed Si reference solar cell (Fraunhofer Institute) with a KG5 ?lter. To ...Solar Cells Made from Vertically Aligned Single-Crystal Rutile TiO2 Nanowires....
Self-assembled nanoporous rutile TiO2 mesocrystals for high rate lithium-ion batteries
Anisotropy in the Electrical Conductivity of Rutile TiO2 in the (110) Plane...The rutile single crystal (1 cm × 1 cm × 0.1 cm) was obtained ...