上转换发光机理总结

《上转换发光机理总结》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、上转换发光机理及其应用宋阳2012-05UpConversionPhotoluminescenceMechanismandItsApplications几种基本的上转换过程一.双光子吸收二.激发态吸收几种基本的上转换过程三.能量共振传递几种基本的上转换过程四.光子雪崩几种基本的上转换过程五.其他合作敏化合作发光几种基本的上转换过程Inordertoobservebimolecularquenchingofthetripletexcitedstateofthesensitizerthetripletaccept

2、orenergymustbelowerthanthetripletenergyofthesensitizer.Thegreatertheenergydifferencebetweenthetripletsensitizerandtripletacceptor,thegreaterthedrivingforceforthisreactionandgenerallyspeaking,themorefavorablethetripletenergytransferprocess.Itisalsoadvantageo

3、ustouseacceptors/annihilatorswithnearunityfluorescencequantumyieldssincethisvalueultimatelycontributestotheoverallupconversionquantumefficiency.Thesensitizer(donor)moleculeischosensothatitssingletexcitedstateliesbelowthatoftheacceptor'ssingletmanifoldwhilet

4、hesensitizer'stripletstateliesabovethatoftheacceptor.Inessence,thesingletandtripletexcitedstatesofthesensitizershouldbestrategicallynestedbetweenthesingletandtripletexcitedstatesoftheacceptor/annihilator.Aslongasthesespecificenergycriteriaaremetandthecombin

5、edtripletenergyfromtwoacceptormoleculesisgreaterthanorequaltotheacceptor'ssingletstateenergy,thenconditionsareappropriatefortheobservationofupconvertedfluorescencefromthesampleTTET-TTA过程镧系三价离子能级图实例（1）Yb/Er,Yb/TmJournalofAlloyandCompoundsVolume509,Issue5,10F

6、ebruary2011实例（1）Yb/Er,Yb/Tm实例（2）Yb/Ho/Ce,Yb/Ho实例（2）Yb/Ho/Ce,Yb/Ho实例(3)Gd(Ⅲ)的能量传递实例（4）Mn(Ⅱ)的参与实例（4）Mn的参与实例（4）Mn的参与未完待续。。。