原位合成法制備CdS納米晶薄膜.pdf

1、天津大學(xué)碩士學(xué)位論文原位合成法制備CdS納米晶薄膜姓名：初娟申請學(xué)位級別：碩士專業(yè)：材料學(xué)指導(dǎo)教師：靳正國201112NanocrystallineCdSthinfilmsweredepositedonglasssubstratesbyanewinsituchemicalreactionsynthesisusingcadmiumprecursorsolidfilmsasreactionsourceandsodiumSUlfidebase

2、dsolutionsasanionicreactionmediumEfrcctsofethanolamineadditiontothecadmiumcationicprecursorsolidfilms，depositioncyclenumbers，annealingtreatmentsinAratmosphere，theS：Cdmolarconcentrationsinseparatecationicandanionicprecurs

3、orsolutionsandthedepositiontemperatureonstructure，morphologychemicalcompositionandopticalpropertiesoftheresultantfilmswereinvestigatedbyXraydiffraction，fieldemissionscanningelectronmicroscope，emrgydispersiveX—rayanalysis

4、andUVVisspectrameasurementsTheresultsshowthatCdSthinfilmsdepositedbythein—situchemicalreactionsynthesishadwurtzitestructurewith(002)planepreferentialorientationandthistendencygraduallyenhancedwithincreaseofS：Cdmolarconce

5、ntrationratioThecrystallitesizewasintherangeof16—19nm，highdepositiontemperatureandannealingprocesscouldimprovegrainsizeThegrowthoffilmthicknesswasalmostconstantwithdepositioncyclenumbersandabout96ampercycleandchangedfiom

6、80to100nmthicknesspercycleintherangeofdepositiontemperaturefrom20。Cto60。CAlso，weusedsolidcadmiumprecursorfilmsasreactionsourceandammoniumsulfidebasedsolutionsasanionicreactionmediumtodeposituniform，cmckfree，denselypacked

7、nanocrystalline，hexagonalwurzitestructureCdSthinfilmsInfluenceoftheCd：Smolarconcentrationsinseparatecationicandanionicprecursorsolutions，depositioncyclenumbersandannealingtreatmentinAratmosphereonstructure，morphologyfilm

8、growth，chemicalcompositionandopticalpropertiesoftheh—situchemicaldepositedfilmswereinvestigatedXRDandSAEDanalysisconfhmedthatcrystalstructureofthein—situchemicaldepositedfilmsatroomtemperaturewasinitialstageofhexagonalwu

9、rtzitecrystallizationandgrewintowurtzitephasebyannealingat300。CandaboveCrosssectionprofilesofCdSthinfilmsobservedbyFESEMshowedthatgrowthrateoffilmthicknesswerealmostlinearwithabout38nmperdepositioncycleFESEMandAFMresults