简介:Thestrategyofsequentiallyspin-coatingaperovskitefilmfromtheperovskiteprecursorandanelectrontransportinglayerof[6,6]-phenyl-C71-butyricacidmethylester(PC71BM)isdevelopedtosimplifythefabricationprocedureofperovskitesolarcells.X-raydiffractionandscanningelectronmicroscopyindicatethatPC71BMfilmonperovskitelayercanretardtheevaporationofdimethylsulfoxide(DMSO)efficiently,thusprolongingthetransformationofintermediatephasetoperovskitecrystals,leadingtoahighqualityperovskitethinfilm.Thesolarcellswiththestructureofindiumtinoxides(ITO)/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS)/CH3NH3PbI3/PC71BM/bathocuproine(BCP)/Agmadefromthissimplifiedmethodexhibitahigherefficiency(12.68%)thanthosefromtheconventionalone-stepmethod(9.49%).
简介:Theefficiencyofthepoly(3-hexylthiophene)(P3HT)and[6,6]-phenylC61-butyricacidmethylester(PC61BM)basedorganicsolarcellswasenhancedbyusing1,2,4-trichlorobenzene(TCB)asaprocessingadditivetocontroltheblendmorphology.TheadditionofTCBimprovedthearrangementofP3HTwhichresultedingoodphaseseparatedblendfilms.Correspondingly,theoptimizedsolarcellsshowedapowerconversionefficiency(PCE)of4.17%withafillfactor(FF)of0.69,whichwerehigherthanthoseofcommonthermalannealingdevices(PCE3.84%,FF0.67).Theefficiencywasfurtherimprovedto4.74%bythermalannealingat150°Cfor10minwithahigherFFof0.74.
简介:CTAB/TX-100microemulsion-basedgel(MBG),whichcouldbesoakedinaqueoussolutionforalongtimewithoutmechanicalstrengthandshapechanges,wassuccessfullyprepared.LipaseimmobilizedinthisgelhadahigheractivitythanthatinCTABMBGwhencatalyzedtheesterificationreactionbetweenn-hexanoicacidandn-octanolanditsenantioselectivitywasslightlyhigherwhencatalyzedthestereoselectiveesterificationreactionbetweenracemicibuprofenandn-octanol.Inaqueoussolution,lipaseinCTAB/TX-100MBGcouldcatalyzesmoothlythehydrolysisreactionofoliveoilandcouldbereusedmanytimeswithouttheevidentchangeofMBGmechanicalstrengthalthoughitsactivitydecreased41.8%afternine-timerecycles.
简介:ThetreatmentofsalicylicacidmanufacturingwastewaterbyNDA-100resinwasinvestigated.ThesorptionintensityofphenolwasfoundtobestronglydependentonpHoftheaqueousphase.EquilibriumadsorptiondatafittobothLangmuirandFreundlichmodels.ThecolumnadsorptionshowedthatthisprocesswassuitableforthetreatmentofsalicylicacidmanufacturingwastewaterAbout99.9%CODcrremovalwasobtainedundertheoptimaloperatingconditions.Theresincouldbecompletelyregeneratedwith1BV8%(w/w)NaOH+2BVH2O,therecoveryof98.9%ofthesubstancewasreached.Thisprocessmakesitpossibletorecoverthevaluablematerialfromthewastewaterandtoimprovetheeffluentwaterquality.
简介:Co(II)-salenwasencapsulatedinMIL-100(Cr)metalorganicframeworkby"shipinabottle"tosynthesizeanewelectrocatalyst,Cosalen@MIL-100(Cr).ThematerialwascharacterizedbyXRD,FT-IR,UV-VisandN2-adsorption.TheCosalen@MIL-100(Cr)modifiedglassycarbonelectrodeexhibitsawell-definedreductionpeakatthepotentialof–0.21Vtowardtheoxygenreductionreaction(ORR)bycyclicvoltammetry(CV)inpH=6.84phosphatebuffer.Almost400mVpositiveshiftofpotentialatCosalen@MIL-100(Cr)modifiedelectrodeforORRcomparedwiththatatbareglassycarbon,indicatesthatCosalen@MIL-100(Cr)possessesexcellentelectrocatalyticactivity.ThetransferrednumberofelectronsforORRwasdeterminedbychronocoulometry.TheresultsuggeststhattheintroductionofCo(II)-salencomplexintoMOFincreasestheelectrocatalyticactivityviaafour-electronreductionpathway.Furthermore,thiselectrocatalystexhibitsgoodstabilityandreproducibility.
简介:Theadsorptionandelectronicpropertiesofisolatedcobaltphthalocyanine(CoPc)moleculeonanultrathinlayerofNaClhavebeeninvestigated.High-resolutionSTMimagesgiveadetailedpictureofthelowestunoccupiedmolecularorbital(LUMO)ofanisolatedCoPc.ItisshownthattheNaClultrathinlayerefficientlydecouplestheinteractionofthemoleculesfromtheunderneathmetalsubstrate,whichmakesitanidealsubstrateforstudyingthepropertiesofsinglemolecules.Moreover,strongdependenceoftheappearanceofthemoleculesonthesamplebiasintheregionofrelativelyhighbias(>3.1V)isascribedtotheimagepotentialstates(IPSs)ofNaCl/Cu(100),whichmayprovideuswithapossiblemethodtofabricatequantumstoragedevices.
简介:HeteroepitaxialLaAlO3filmsweregrownonaSrTiO3/Si(100)substratebylasermolecularbeamepitaxyunderdifferentoxygenpressures,andtheirpropertiessuchascrystallinityandelectricalcharacteristicswereexperimentallyinvestigatedusingthevariousmeasurementmethods.Theresultsshowthatmostpropertiesdependmainlyonthedepositionoxygenpressure.ThecrystallinityandtheC-VandI-Vcharacteristicscanbegreatlyimprovedwiththeincreasingoxygendepositionpressure.Moreover,afterannealedat1050~CinN2ambient,theC-VandI-VcharacteristicsofLAOfilmsdepositedattheloweroxygenpressurearealsoimprovedduetothedecreaseofoxygenvacanciesinLAOfilms.
简介:阐明physisorbed的效果几何学和hydrogenated钻石电影的电子结构上的活跃离子,HCO3-的模型,H3O+,并且哦hydrogenated钻石(100)上的离子physisorbed出现被构造。密度功能的理论被用来计算状态的几何学,吸附精力,和部分密度。结果证明表面都在离子吸附以后改变了到不同的度的hydrogenated钻石(100)的几何学。在他们之中,H3影响的O+离子hydrogenated钻石(100)的几何学出现大多数。这与计算吸附精力的结果很好一致,它显示一个强壮的静电的吸引力发生在hydrogenated钻石(100)之间表面和H3O+离子。另外,电子从hydrogenated钻石(100)显著地转表面到吸附的H3O+离子,它导致一向下变在H3O+离子。然而,为活跃离子喜欢哦和HCO3-,没有戏剧的变化为吸附的离子的电子结构出现。