【摘要】 以Y2O3,Yb2O3,Er2O3为原料,利用燃烧法分别制备了Y2O3:Er3+和Y2O3:(Yb3+,Er3+)两种纳米材料和相应的体材料Y2O3:(Yb3+,Er3+)。用发射波长为978 nm的半导体激光器和日立F-4500荧光分析仪测量了它们的上转换发光,得到纳米材料Y2O3:Er3+的上转换发光主要为绿色上转换发射而纳米材料Y2O3:(Yb3+,Er3+)主要为红色上转换发射,而后者与激活离子掺杂浓度相同的体材料Y2O3:(Yb3+,Er3+)的上转换发射相比较,体材料以绿色上转换发射为主、红色上转换发射很弱。更多还原

【Abstract】 Two nanomaterials Y₂O₃: Er³⁺ and Y₂O₃:(Yb³⁺,Er³⁺) were prepared by combustion on the basis of reagents Y₂O₃,Yb₂O₃ and Er₂O₃.The corresponding host Y₂O₃:(Yb³⁺,Er³⁺) was obtained by increasing calcination temperature.Upconversion emission was obtained under 978 nm LD excitation.Comparing nanopowder oxide Y₂O₃:Er³⁺ with nanometer materials Y₂O₃:(Yb³⁺,Er³⁺) with respect to upconversion spectra,the upconversion emission of the former mainly was green upconversion and that of the latter mainly red light.However,the upconversion emission of nanopowder Y₂O₃:(Yb³⁺,Er³⁺) was different from that of its corresponding host,with main red upconversion emission for the former but main green upconversion emission on the latter.更多还原