Spectroscopic properties of Er3+/Ho3+/Tm3+ doped α-SiAlON ceramics under 793 nm excitation

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

作者机构：Department of Fusion Science and Technology Sun Moon University Research Center for Eco-Multifunctional Nano Materials Sun Moon University Department of Environment and Bio-Chemical Engineering Sun Moon University 

出 版 物：《Progress in Natural Science:Materials International》 (自然科学进展·国际材料(英文))

年 卷 期：2021年第31卷第6期

页      面：891-897页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

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) 

主　　题：α-SiAlON Upconversion Downshifting 793 ​nm excitation 

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(Er3+, Ho3+, and Tm3+)-doped α-SiAlON ceramics upon 793 nm excitation. Using α-Si3N4ceramic as a precursor the lanthanides-dopedα-SiAlON ceramics were synthesized by the hot-press method. The lanthanides induced no significant secondary phases in the sintered α-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 Er3+, Ho3+and Tm3+ions as well as the ground state absorption in Er3+and Tm3+are responsible for the observed spectroscopic properties.