稀土摻雜SiO-,2-凝膠基質(zhì)發(fā)光材料的制備及特性研究.pdf

1、分類號：』虹密級：——單位代碼：】Q盟Z學(xué)號：2Q盟2Q!盟西北大學(xué)碩士學(xué)位論文題目：疊圭豎盤墨iQ2塹壁基匱塞盤鹽盤鮑劍壘墾掛：絲塹窒指導(dǎo)教師：翅嚷垂專業(yè)技術(shù)職務(wù)：絲撞學(xué)科【專業(yè)】：塑基查塹堡答辯日期：呈QQ!!魚：!學(xué)位授予日期：——二00七年五月AbstractUsings01gelprocess，pureSi02xerogel，Th3doped，Tb3鋤dEu3codopedSi02substratexerogelandfilm

2、werepreparedThemoleculareonfigurationofxerogeiwelecharacterizedbyusingFTIRspectraappearanceoffilmwefecarriedoutbymeallsofAtomicForcemieroscope(AFM)，theexcitationandemissionspectraWCI“emeasuredbyspectrophotometerequipment

3、TheluminescentfeatureofpureSi02xcrogelhavebeenresearchedwhichshowedstrongcmissionofultravioletandbluelightTheultravioletemissionWasrelatedtointerfacesmtes，andblueemissionwascausedbydefect5taresTheemissionimensitywasenhan

4、cedlargelyannealedat800“(2TheeInissionspectraofTb3dopedsamplewasconsistedof6peaksunder250hmexcitationwhichlocated缸379nm，414nm，485nm，545nm，588nm622nmrespondedto鋤一7F6，溉一7F4，h一7FJ(J《，54，3)transitionofTbionsrespectivelyInflu

5、enceofannealingtemperature，watercontent，boricacidonthelumineseantcharacteristichavebeenstudied，Ontheconditionofannealingtemperaturewas700“CandofthemoleratioofTEOS：ETOH：H20was1：4：5andofacidconcentrationwas10％theemissionin

6、tensityofTb3dopedsamplewasimprovedInfluenceofannealingtemperattmeandTh，concentration011theemissionintensityofEu3andTb”CO—dopedsampleshavebeenresearchedwhenthemassratioofEu3：n，is5：1，andtheannealingtemperatureis700“C，Itsho

7、wedintenseredemissionhoweverwiththesamemassratioofEu3：Tb”itshowedintenseblueemissionannealedat850“C，the麗giIlalideaofenergy仃ansfer舳mTbtoEuinSi02substratehavebeendiscussedandtheblueeznissionintensityenhancedphenomenaofEu2i