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1、摘要氧化镩是一種多閔途的Ⅱ.Ⅵ族寬蔡帶半導體材料。傳統(tǒng)上,ZnO薄膜被廣泛應用予太陽能電池、聲表面波器l牛、壓敏器件、逶明導電電極等領域。近顰來,ZnO露為鼴禁帶半導侮零孝辯懿硪究麓寒蓮受至§入翻約重視。秘GaN耨范,ZnO薄膜具脊生長溫度低,激子復合能i鏹(ZnO:60meV,GaN:21—25meV),有可能安現(xiàn)室溫下較強的紫外受激發(fā)射,制各出性能較好的探測器、發(fā)光二極管和激光二極警等光墩子器籜。ZnO瓣輻翦波長其有魄CmN翡藍光發(fā)葑囂矮,對增熱巍記錄密度具肖熏要意義。目前,有關氧化鋅的研究集中在氧化鋅的紫外光發(fā)射和可見光發(fā)光槐制方藤。對予可見光發(fā)光機镥嵋前尚炙統(tǒng)
2、一認識。本文綜述了ZnO薄膜靜各韓壘長技術及其簸理,莠穰括了ZnO薄貘耢究的最新進展。利用自制的超聲霧化熱解沉積技術生長了具有c軸擇優(yōu)取向的多品ZnO薄膜,并利用x射線衍射儀卿)、掃描峨子最微鏡(SEM)、原子力鼴微鏡(AFM)、紫鄉(xiāng)}一霹覓必光譜鉸COV-VisabsorptionSpectrometer)、熒競競譜儀(PLSpectrometer)等測試手段,對ZnO薄膜的結構和憾能進行表鏹。研究了各謄長條件,皴前驅物溶液濃發(fā)、襯底溫度、沉積時間、邋火處理和摻雜濃度對ZnO薄膜結秘釉往麓煞影璃。實驗甓采襲鞠,蘺驅麓濃度增熱有耱予鍘備C轆取向生長的ZnO薄膜:400
3、℃時,沉積出黼質量C軸擇優(yōu)取向的ZnO薄膜,在氧氣氣氛下退火溫度為600℃時,得到的游膜結晶性較好;而且,摻雜濃度增加譽測予ZnO薄貘豹取淘生長。受激發(fā)射巍激發(fā)先結粟襲疆,樣品在6∞℃退火辯390rim紫外發(fā)射最強,同時觀察到強度較弱的可見光發(fā)光帶。實驗迸發(fā)現(xiàn),退火氣氛可明顯改變ZnO的本綴瀾缺陷發(fā)光,可見發(fā)光枧鐿《探討中,蘸綠發(fā)光的主鬟懸由氧空位域鋅填踩等缺麓弓l起靜。關鍵詡ZnO薄膜;超聲霧化熱瓣;受激發(fā)射;光致發(fā)光AbstractZnOisaII-VIsemiconductormaterialwithwideband-gap,widelyusedinmanyar
4、eas.Traditionally,ZnOthinfilmswereappliedinwavedevice,gassensor,transparentelectrodes,andSOon.Recently,ZnOhasgainedmoreandmoreattentionintheoptoelectronicfieldofUVdetector,Lightdisplayetc.ComparedtoGaN(25emV),high-qualityZnOwithahigherbindingenergyof60meVCanbesynthesizedatmuchlowertempe
5、rature,whichpromisesstrongphotoluminescencefromboundexcitonicemissionatroomtemperature.UptOnow,thevisibleemissionandultravioletlasingemissionofZnOhavebeenthesubjectofmuchresearch.Inthispaper,thevariousgrowthtechniques,applications,andtheuptodateprogressesintheresearchofZnOarereviewed.C-
6、axisorientedpolycrystallineZnOthinfilmswerepreparedbyself-madeUltrasonicSprayPyrolysisdepositiontechnique.ThestrucRkreandpropertiesofthefilmswerecharacterizedbyXRD,SEM,AFM;UV二ⅥSAbsorptionandPL.etc.Thee腧ctsofgrowthparametersonthequalityofZnOfilmsalediscussed,suchassolutionconcentration,s
7、ubstratetemperature,depositiontime,annealingtemperatureanddopingconcentration.Astheresultsshown,heavysolutionconcentrationandlowdopingconcentrationareadvantageoustogrowC-axisorientedZnOthinfilms;highorientedZnOthinfilmshavebeendepositedat400"(2,andthecrystallineoffilmsbecomebet