稀土堿金屬復合氟化物中tb39;3的真空紫外熒光性質(zhì)

1、北京交通大學碩士學位論文稀土堿金屬復合氟化物中Tb的真空紫外熒光性質(zhì)姓名：陳列優(yōu)申請學位級別：碩士專業(yè)：材料物理與化學指導教師：由芳田20081201ABSTRACTThestudyofVUVphosphorsbecomesmoreextensiverecentlyastheVUVphosphorsareincreasinglyusedformercuryfreelampsandthePlasmadisplayplate(PDP)Ino

2、rdertoimprovetheluminescentefficiencyofthephosphorsunderhighenergyvacuumultravioletradiation(VUV)excitation，thepropertiesofthehostabsorptionbandandtheabsorptionof4r15dstatesandtheenergytransferinthesystemshavebeenstudied

3、Theaimofthispaperismainlyinresearchofthespectroscopiccharacteristicsandtheluminescentmechanismsoftheelectronictransitionsat4fslevelsand4f75dstatesofTb3underVUVandultravioletfuv)excitation，thepropertiesofthehostabsorption

4、band，thefactorthataffectluminescenceproperties，andtofindtheroutesofincreasingtheluminescentefficiencyofthevUVphosphorbydifferentsynthesismethodsTheresultsobtainedinthisthesisare嬲follows：1Thepropertiesofthehostabsorptionb

5、andintherangeofVUVarestudiedwhichoftherareearthfluorideandaluminatedopedwithTb”，andpropertiesoftheabsorptionbandoftheTb3ion’S4f5dtransitionTheexcitationspectrumrevealsthattheabsorptionbandoftheTb，4f5dtransitionisroughlyi

6、ntherangebetween170nmand220nminrare—earthfluoridesWhileintheoxysaltsystem，thespliUingbarycenteroftheTb34f5dstateenergyisobviouslylowerForinstanceinSrAI12019：Tb3，itisintherangebetween230nmand260nmAndthelowestpositionsof4f

7、75dstatesofTb3indifferenthostsareobserved2Becauseofthewideforbiddenbandsinfluorides，thefdtransitionsofTb3lieinhigherenergyposition，avoidingoverlapoffftransitionsTheproductspreparedbyhydrothermalmethodshowthatthehostabsor

8、ptionbandsofrare—earthfluoridesdopedwithTb”wasobservedbetween130nmand160nmAndabroadhostabsorptionbandsofSrAll20i9：Zb”wasobservedbetween140nmand170nmTheabsorptionbandsofthen34f4f75dtransitioninSrAIl2019：Th3areinlowerenerg