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1、中文摘要采用液相薄膜制各工藝一sILAR(連續(xù)離子層吸附反應(yīng))法,于玻璃襯底上制備了CdS,ZnS,RuS2單組份薄膜及(Zn.,Cd)S復(fù)合薄膜??疾炝斯に噮?shù)對(duì)薄膜質(zhì)量的影響,對(duì)薄膜的表面形貌,薄膜的生長(zhǎng)速率以及熱處理與薄膜的成相及其電阻率的關(guān)系進(jìn)行了觀察和分析。對(duì)sILAR法制備的復(fù)合薄膜進(jìn)行了光電性能分析。SILAR法中pH值的增大有利于吸附反應(yīng)的進(jìn)行,且明顯加大了薄膜生長(zhǎng)速率。控制陽(yáng)離子前驅(qū)體溶液的pH~5,陰離子前驅(qū)體溶液的pH在11.5~12.0的強(qiáng)堿性環(huán)境中為最佳的條件。SILAR制備薄膜時(shí)
2、,要選擇適當(dāng)?shù)那膀?qū)體溶液濃度。濃度過(guò)高,反應(yīng)速率和晶粒生長(zhǎng)過(guò)快,制得的薄膜不均勻且不致密。濃度過(guò)小,反應(yīng)速度過(guò)慢,同樣無(wú)法得到致密膜。選擇適當(dāng)?shù)姆磻?yīng)和洗滌時(shí)間,根據(jù)前驅(qū)體的不同一般為15~30s。XPS分析結(jié)果表明,CdS薄膜的成分是偏離化學(xué)計(jì)量比的,偏離計(jì)量比的原因主要是形成了Cd.O鍵。隨著循環(huán)次數(shù)的增加,薄膜表面的顆粒尺寸趨于增大。薄膜在常溫下為非晶態(tài)結(jié)構(gòu),隨熱處理溫度的提高薄膜的結(jié)晶度提高,薄膜的電阻率趨于下降。通過(guò)調(diào)節(jié)(Zrl,Cd)S復(fù)合薄膜中zn和Cd的比例,可調(diào)節(jié)復(fù)合薄膜的光性能,使用這種方
3、法可以獲得禁帶寬度可調(diào)的硫化物復(fù)合薄膜,是一種制備復(fù)合光電薄膜的新途徑。薄膜的生長(zhǎng)基于非均相生長(zhǎng)機(jī)理,吸附反應(yīng)過(guò)程可以用表面質(zhì)子化模型和雙電層模型解釋。關(guān)鍵詞:SILAR法;半導(dǎo)體薄膜;光電性能;工藝參數(shù):生長(zhǎng)機(jī)理AbstractCadmiumsulfide,zincsulfide,rutheniumdisulfideand(Zn,Cd)SmillfilmswerepmparedonglassslidesbySILAR(successiveiomclayeradsorptionandreaction)met
4、hod.耽eeffectsofthetechnologicalparametersonthequalityofthefilmswerestudied.Thegrowthrateandsurfacemorphologyofthefilms、vithcycletimeswerecharacterized.nleeffectofannealingoncwstalstructureandresistivityofthefilmswerestudied.Also,thegrowthmechanismofheterog
5、eneousreactionofthethinfilmandtechnologicalwerediscussed.Thefilmsas-depositedareamorphousandcompact,thegrowthrateofCdSfilmisabout2nm/cycle.ZnSfilm3nm/cycleandthesizeoftheparticlesisincreasedwitllthecycletimes.ThecontentsoftheCdSfilmsalenotstoichimometricbe
6、causeofformationofCd.Obond.Hi幽pnvaluehaspositiveeffectonthe矗lmpreparation,anditcanenhancethegrowthrate.Togetsulfidefilmswithhighquality,theprecursorsshouldhaveproperconcentrationwhilethereactionandwashmgtimesrangefrom15-30secondsfordifferentprecursors.Thec
7、rystallityofthefilmswereenhancedwiththeincreaseofthetemperatureTheresistivityofCdSisobviouslydecreased誠(chéng)thorderofmagnitudeat673K.Theadsorptionettiencyof(Zn,Cd)Sthinfilmsas—depositesdisincreasedwiththedecreaseofZ們dtoolratio.Thebandofthe(zn,Cd)scompositefilms
8、callbetoleratedbycontroltheratiooftheionsintheprecursors.mefilmgrowthisbasedonthemechanismofheterogeneousgrowth.111emodelofsurfaceprotonationanddoubleelectricallayerwereusedtoexplainit.Keywords:SILARmethod;se