[14p-A35-1~12] 13.9 Optical properties and light-emitting devices

△ [14p-A35-5] Synthesis and characterization of (Y,Gd)₂O₃:Yb³⁺,Er³⁺upconversion fluorescent nanosheets

〇Yoshiki Iso¹, Jo Sato¹, Tetsuhiko Isobe¹, Takashi Jin², Yoshichika Yoshioka³ (1.Keio Univ., 2.RIKEN, 3.Osaka Univ.)

Keywords:fluorescent nanosheet, upconversion, MRI

(Y,Gd)₂O₃:Yb³⁺,Er³⁺ upconversion fluorescent nanosheets were fabricated and characterized. (Y,Gd)₂O₃ was synthesized by calcining a precursor via hydrothermal method. Nanosheets were obtained when Gd/(Y+Gd) ≤ 25%. Upconversion photoluminescence intensity of (Y,Gd)₂O₃:Yb³⁺,Er³⁺ nanosheets increased with increasing calcination temperature from 600 °C to 800 °C with maintaining the nanosheet shape. T₂ contrast ability for MRI was also confirmed on (Y,Gd)₂O₃:Yb³⁺,Er³⁺ nanosheets.