CaSc2O4基质中上转换发光及下转换发光的研究

Upconversion and downshifting luminescence in CaSc_(2)O_(4) host

稀土掺杂发光材料由于其优秀的发光特性,在生物成像、光伏太阳能电池、显示防伪等领域均展示出优秀的应用价值。基质材料的选取对发光强度有强大影响。CaSc_(2)O_(4)作为优秀的基质材料,具有较低的声子能量、较强的晶场、较近的原子距离,以及较好的物理特性和化学稳定性。文中阐述了Tm^(3+)/Yb^(3+)、Ho^(3+)/Yb^(3+)和Er^(3+)/Yb^(3+)在CaSc_(2)O_(4)中的上转换发光特性,以及Tm^(3+)/Yb^(3+)和Ce^(3+)/Yb^(3+)在CaSc_(2)O_(4)中的下转换发光特性,并展示了其在高温光学测温监测和提高硅太阳能电池利用效率方面的应用潜能。

The rare earth ions doped materials have played an important role on biological medical imaging,photovoltaic solar cells,security and so on.The selection of host material has a strong impact on the luminescence intensity.CaSc_(2)O_(4) is a kind of promising oxide hosts because of the low cutoff phonon frequency,strong crystal field,near atom distance,stable chemical and thermal properties.This paper reviews the upconversion and downshifting luminescence of Tm^(3+)/Yb^(3+),Ho^(3+)/Yb^(3+),Er^(3+)/Yb^(3+)and Tm^(3+)/Yb^(3+),Ce^(3+)/Yb^(3+)doped in CaSc_(2)O_(4) materials,and demonstrates its potential application in optical temperature sensors under high-temperature conditions and improving the efficiency of silicon solar cells.