Solvothermal synthesis of CeO2:Er/Yb nanorods and upconversion luminescence characterization

• CeO2:Er/Yb nanorods exhibit better upconversion property.
• The luminescence intensities of the red emissions are higher than the green ones.
• The upconversion luminescence intensities are proportional to the excited power.
• The mechanism of upconversion luminescence involves the ET and ESA.

CeO2:Er/Yb nanorods as upconversion materials were successfully synthesized by solvothermal method. The structures and morphologies of the CeO2:Er/Yb nanorods were characterized by XRD, SEM, HRTEM. The nanorods emitted two kinds of visible lights: the green (2H11/2, 4S3/2 ⟶ 4I15/2) and the red (4F9/2 ⟶ 4I15/2), under excitation with a continuous wave laser in the near-infrared at 980 nm at room temperature. The mechanism of different emissions was explored involving excited-state absorption (ESA) and energy transfer (ET) upconversion.

CeO2:Er/Yb nanorods were synthesized by solvothermal method. The nanorods emitted two kinds of visible lights: the green (2H11/2, 4S3/2 ⟶ 4I15/2) and the red (4F9/2 ⟶ 4I15/2) under excitation with a continuous wave laser at 980 nm. The luminescence intensities are proportional to the excited power and the intensities of the red emissions are higher than the green ones.Figure optionsDownload as PowerPoint slide