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1、第28卷第3期無機化學學報Vo1.28No.32012年3月CHINESEJ0URNALOFIN0RGANICCHEMISTRY437.444ZnSnO3透明導電薄膜:溶膠一凝膠法制備及性能季伶俐1賀蘊秋-l12李樂11同濟大學材料科學與工程學院,上海200092)(同濟大學先進土木工程材料教育部重點實驗室,上海20092)摘要:采用溶膠一凝~(So1.Ge1)~和旋涂法制備了Zn—Sn.O系統(tǒng)薄膜。通過對干凝膠的熱重一差示掃描同步熱分析fTG.DSC1.研究了干凝膠在燒結(jié)過程中的反應歷程。采用X射線衍射(XRD)、X射線光電子能譜(xPs1、場發(fā)射掃描電鏡(FE.SEM1以及
2、紫外一可見透過率(uv.Vis)等表征了燒結(jié)后薄膜的晶相、晶格缺陷、微觀形貌以及紫外一可見光透過率。本文還研究了燒結(jié)溫度、N氣氛熱處理以及組成變化對薄膜電阻率的影響,結(jié)果表明:偏錫酸鋅ZnSnO晶體薄膜具有較低的電阻率;當n(n+n:50.3at%時,薄膜的電阻率達極小值,約為8.0xl0zQ·am。偏錫酸鋅ZnSnO晶體的導電機理研究表明:晶格中間隙陽離子含量的增加有利于薄膜電阻率的降低,而氧空位的形成則使其電阻率升高。薄膜的紫外一可見光透過率(uv—Vis)表明:偏錫酸鋅ZnSnO晶體薄膜在400900nm的可見光波段透過率可達8O%以上關(guān)鍵詞:ZnSnO,;薄膜;溶膠一凝
3、膠法;透明性;導電材料中圖分類號:0614.241;0614.43+2文獻標識碼:A文章編號:1001.4861(2012)03.0437.08TransparentandConductivePropertiesofZnSn03CrystalFilmsPreparedbySol-GelMethodJILing—LiHEYun—Qiu,’LILe(SchoolofMaterialScienceandEngineering,TongjiUniversity,Shanghai200092,China)(2KeyLaboratoryofAdvancedCivilEngineeringM
4、aterialsofJ]lnfofEducation,rongiUniversity,Shanghai200092,China)Abstract:TheZn-·Sn—-0systemthinfilmswerefabricatedbysol-·gelprocessandspincoatingtechniqueonsilicaglasses.ThereactionofdrygelduringsinteringwascharacterizedbyThemogravimetry—DifferentialScanningCalorimetrysynchronousthermalanaly
5、sis(TG-DSC).Andthecrystallinephases,thedefects,themorphologyandthetransmittanceoffilmsaftersinteringinairwerecharacterizedbyXRD,XPS,F(xiàn)E—SEMandUV—Vis.Theresistivityofthefilmsisaffectedbythesintefingtemperatureinair,thetreatmentinN2andthefilmcomposition.TheZnSnO3crystalhasalowresistivityandthem
6、inimumresistivity(about8.0x1012·am)isobtainedwhen(n+sn)isequalto50.3at%.TheelectricpropertytestingresultsalsoshowthatthedefectofinterstitialcationsinZnSnO3latticeisbeneficialforalowerresistivity,meanwhiletheoxygenvacanciesinthelatticeleadstoanoppositeresult.TheUV—Visanalysisindicatesthatthet
7、ransmittanceofZnSnO3crystalfilmsismorethan80%intherangeof400~900nm.Keywords:ZnSn03;thinfilms;Sol-Gelprocess;transparency;conductivematerial近年來.透明導電氧化物(Transparentand眾多TCO薄膜中,研究得最為成熟的當屬In-xSnxO,ConductiveOxides,TCOs)薄膜因其良好的導電性和fITO)薄膜,其最低電阻率可達1OQ·am