Spectroscopic properties of Er^(3+)/Ho^(3+)/Tm^(3+)dopedα-SiAlON ceramics under 793 nm excitation  

作　　者：Bina Chaudhary Dhani Ram Dhakal Tae-Ho Kim Soo Wohn Lee Yuwaraj K.Kshetri 

机构地区：[1]Department of Fusion Science and Technology,Sun Moon University,Chungnam,31460,Republic of Korea [2]Research Center for Eco-Multifunctional Nano Materials,Sun Moon University,Chungnam,31460,Republic of Korea [3]Department of Environment and Bio-Chemical Engineering,Sun Moon University,Chungnam,31460,Republic of Korea

出　　处：《Progress in Natural Science:Materials International》2021年第6期891-897,共7页自然科学进展·国际材料（英文版）

基　　金：supported by the Brain Pool Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(Grant No.2020H1D3A1A02081359);Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Education(Grant No.2021R1I1A3059543);National Research Foundation of Korea(NRF)funded by the Ministry of Science and ICT(Grant No.2021R1F1A1058276)。

摘　　要：This paper reports the first demonstration of super broadband infrared downshifting emission extending from1640 nm to 2200 nm with the full width at half maximum of~417 nm in lanthanides(Er^(3+),Ho^(3+),andTm^(3+))-dopedα-SiAlON ceramics upon 793 nm excitation.Usingα-Si;N;ceramic as a precursor the lanthanides-dopedα-SiAlON ceramics were synthesized by the hot-press method.The lanthanides induced no significant secondary phases in the sinteredα-SiAlON ceramics.Strong two-photon upconversion emission bands centered at 547,671 and 694 nm have also been observed upon 793 nm excitation.The time-resolved measurements of the upconversion emissions confirm that the efficient energy transfer among the Er^(3+),Ho^(3+)and Tm^(3+)ions as well as the ground state absorption in Er^(3+)and Tm^(3+)are responsible for the observed spectroscopic properties.

关 键 词：Α-SIALON UPCONVERSION Downshifting 793 nm excitation 

分 类 号：TQ174.1[化学工程—陶瓷工业]