Ag2O dependent up-conversion luminescence properties in Tm3+/Er3+/Yb3+ co-doped oxyfluorogermanate glasses

作者：Hu, Yuebo; Qiu, Jianbei^*; Song, Zhiguo; Zhou, Dacheng

来源：Journal of Applied Physics, 2014, 115(8): 083512.

DOI：10.1063/1.4866875

• SPECTROSCOPIC PROPERTIES
• OPTICAL-PROPERTIES
• TELLURITE GLASS
• ENERGY-TRANSFER
• PBO-GEO2 GLASS
• NANOPARTICLES
• FLUORESCENCE
• ENHANCEMENT
• EMISSION
• PHOTOLUMINESCENCE

Up-conversion (UC) luminescence properties of Ag/Tm3+/Er3+/Yb3+ co-doped oxyfluorogermanate glasses have been studied to assess the effective role of silver nanoparticles as a sensitizer for Tm3+ and Er3+ ions. The X-ray diffraction patterns obtained in this work do not reveal any crystalline phase in the glass. However, the absorption spectra reveal that surface plasmons resonance band of Ag undergoes a distinct split with two maxima and a very broad absorption peak with a background that extends toward the near infrared (NIR) with the increasing of Ag2O added concentration. Transmission electron microscope images confirm that silver nanoparticles have been precipitated from matrix glasses and show their distribution, size, and shapes. In addition, changes in UC luminescence intensity of four emission bands 476, 524, 546, and 658 nm corresponding to (1)G(4) -> H-3(6) (Tm3+), (H-2(11/2), S-4(3/2)) -> I-4(15/2) (Er3+), and F-4(9/2) -> I-4(15/2) (Er3+) transitions, respectively, as a function of silver addition to the base composition have been measured under 980 nm excitation. It is confirmed that Ag2O added concentration plays an important role in increasing the UC luminescence intensity; however, further increase in Ag2O added concentration reduces the intensity.

• 出版日期2014-2-28
• 单位昆明理工大学