CAJ | 학술논문

首次合成了红色荧光材料Sr_3Ti_2O_7:Pr,经过对样品激发、发射光谱、XRD的分析,讨论了具有Ruddlesden-Popper相的Sr_3Ti_2O_7:Pr样品中存在的SrO晶面缺陷对荧光性能的影响,得出SrO层的存在使Pr~(3+)所处的晶体场强度增大、对称性下降,宇称选律部分解禁,同时使Pr-Ti间距减少,由此导致了电荷迁移态(CTS)下降,其激发与发射光谱强度比SrTiO_3:Pr约大20倍.
수차합성료홍색형광재료Sr_3Ti_2O_7:Pr,경과대양품격발、발사광보、XRD적분석,토론료구유Ruddlesden-Popper상적Sr_3Ti_2O_7:Pr양품중존재적SrO정면결함대형광성능적영향,득출SrO층적존재사Pr~(3+)소처적정체장강도증대、대칭성하강,우칭선률부분해금,동시사Pr-Ti간거감소,유차도치료전하천이태(CTS)하강,기격발여발사광보강도비SrTiO_3:Pr약대20배.
For the first time,red phosphor Sr_3Ti_2O_7:Pr was synthesized by solid reaction route.The samples were characteristic by XRD,PL.The result proves the existence of SrO planar changes the coordinate environments including the increase of the crystal field strength and the decline of the symmetry of the crystal field in which Pr~(3+) situated that results in the part-unforbiden of Laporte selection rule and shortens the distance between Pr~(3+) ion and Ti~(4+) ion,which lower the charge transfer state(CTS),so the energy transfer is more efficient from both the valence to conduction band transition and 5 d state of Pr~(3+) to CTS in Sr_3Ti_2O_7:Pr than in SrTiO_3:Pr.Compared with SrTiO_3:Pr,the brightness of Sr_3Ti_2O_7:Pr under UV exciting is about twenty times as that of SrTiO_3:Pr.