简介：

简介：Iridiumnanoparticles(IrNPs)andsubmicroparticles(IrSMPs)withdifferentshapesweresynthesizedandassembledonindiumthinoxide(ITO)andSisubstratesusingtwodifferentmethods:directsurfacegrowthanddrop-dryingassembly.TheobtainedIrNPsandIrSMPswerecharacterizedusingscanningelectronmicroscopy(SEM)andenergydispersivespectroscopy(EDS).TheIrSMPs(orIrNPs)withdisc-likeshapeandirregularshapeswereobtainedonITOsubstratebydirectsurfacegrowthmethodusingpolyvinylpy...

简介：ＶｅｒｔｉｃａｌＧｒａｄｉｅｎｔＦｒｅｅｚｅＧｒｏｗｔｈｏｆＣｄ＿（１－ｘ）Ｚｎ＿ｘＴｅｗｉｔｈＣｄ／ＺｎＲｅｓｅｒｖｏｉｒＨｏｕＱｉｎｇｒｕｎ；ＷａｎｇＪｉｎｙｉ；ＤｅｎｇＪｉｎｃｈｅｎｇ；ＬｉＭｅｉｙｉｎｇａｎｄＴａｏＦｅｎｇ（侯清润）（王金义）...

简介：Inthiswork,asimpleandfacileone-potoleylaminesolvothermalsyntheticmethodwasdevelopedtosynthesizeCu_2ZnSnS_4(CZTS)nanocrystals.AndtheCu_2ZnSn(S,Se)_4(CZTSSe)thinfilmswerepreparedbyselenizingCZTSnanocrystals.TheobtainedCZTSnanocrystalsandCZTSSefilmswerestudiedusingX-raydiffraction(XRD),transmissionelectronmicroscopy(TEM),scanningelectronmicroscopy(SEM),energy-dispersiveX-rayspectroscopy(EDX),andultraviolet–visiblespectrophotometer(UV–Vis).TEMresultsshowthatthesphere–likeCZTSnanoparticleswithdiameterbetween12and35nmarepolydispersed.XRDstudiesindicatethatthepreparedCZTSnanocrystalsformkesteritecrystalstructure,andtheCZTSSefilmswithkesteritecrystalstructurearealsoobtainedattheannealingtemperaturesof500and550°C.Inparticularafterannealingat500°Cfor20min,theCZTSSefilmexhibitsasmooth,uniform,crack-free,andlarge-grainedtopographyandpossessesCu-poorandSn-richcomposition.Moreover,itshowsstrongopticalabsorptionfromvisibletonear-infrared(IR)region,anditsopticalbandgap(Eg)isfoundtobeabout1.44eV.