Broadband sensitization is an effective strategy to enhance the upconversion luminescence(UCL) of lanthanide ions.Herein,novel UC materials LiScSi_(2)O_(6):Cr^(3+)/Er^(3+)(LSS:Cr^(3+)/Er^(3+)) were synthesized by high...Broadband sensitization is an effective strategy to enhance the upconversion luminescence(UCL) of lanthanide ions.Herein,novel UC materials LiScSi_(2)O_(6):Cr^(3+)/Er^(3+)(LSS:Cr^(3+)/Er^(3+)) were synthesized by high-temperature solid state reaction and their luminescent properties were investigated.LSS:Cr^(3+)/Er^(3+)has the broadband absorption in the spectral range of 600-800 nm,and meanwhile shows green UC emissions of Er^(3+)upon pumping Cr^(3+) by the 690 nm laser.The UCL of LSS:Cr^(3+)/Er^(3+)belongs to the twophoton process and is attributed to the energy transfer upconversion mechanism.The effects of the Cr^(3+)and Er^(3+)concentration as well as the Yb^(3+)introduction were also studied.LSS:Cr^(3+)/Yb^(3+)/Er^(3+) exhibits the interesting dual-mode UCL,capable of generating the UCL of Cr^(3+) upon pumping Yb^(3+)ions and the UCL of upon pumping Cr^(3+) ions.This research might promote the development of novel broadband Cr^(3+)-sensitized UC materials.展开更多
基金supported by the Natural Science Foundation of Jiangsu Province of China (BK20160073)the Fundamental Research Funds for the Central Universities (2242019K40061)。
文摘Broadband sensitization is an effective strategy to enhance the upconversion luminescence(UCL) of lanthanide ions.Herein,novel UC materials LiScSi_(2)O_(6):Cr^(3+)/Er^(3+)(LSS:Cr^(3+)/Er^(3+)) were synthesized by high-temperature solid state reaction and their luminescent properties were investigated.LSS:Cr^(3+)/Er^(3+)has the broadband absorption in the spectral range of 600-800 nm,and meanwhile shows green UC emissions of Er^(3+)upon pumping Cr^(3+) by the 690 nm laser.The UCL of LSS:Cr^(3+)/Er^(3+)belongs to the twophoton process and is attributed to the energy transfer upconversion mechanism.The effects of the Cr^(3+)and Er^(3+)concentration as well as the Yb^(3+)introduction were also studied.LSS:Cr^(3+)/Yb^(3+)/Er^(3+) exhibits the interesting dual-mode UCL,capable of generating the UCL of Cr^(3+) upon pumping Yb^(3+)ions and the UCL of upon pumping Cr^(3+) ions.This research might promote the development of novel broadband Cr^(3+)-sensitized UC materials.
