Multi-photon up-conversion enhancement from Gd2(MoO4)3: Er/Yb thin film via the use of sandwich structure

作者：Hao, Haoyue; Chen, Zhaopu; Yang, Jinshuo; Ao, Guanghong; Song, Yinglin; Wang, Yuxiao^*; Zhang, Xueru^*

来源：Journal of Luminescence, 2018, 202: 77-82.

DOI：10.1016/j.jlumin.2018.05.018

• Emission enhancement
• Gd-2(MoO4)(3)
• Thin films
• Sandwich structure
• Up-conversion materials

Lanthanide-doped up-converting nano-particles reveal significant promise for data storage, biological imaging, and temperature sensing, but have not been extensively used due to their low emission intensity. Here, we investigate the up-conversion emissions of Gd-2(MoO4)(3): Er/Yb thin films that are sandwiched by Gd-2(MoO4)(3): Yb thin films. Our results show that the sandwiched thin films possess significant enhancement of emission intensities. The enhancement factors of the green and red emissions, radiated from Gd-2(MoO4)(3): Er/Yb films, reach 9.5 and 5, respectively. Moreover, the ability of sandwich structured thin films in multi-photon up-conversion enhancement is more excellent than that of laser power, attributed to the suppression of undesired radiative/ non-radiative recombination of the intermediate states. In addition, the intensity-based temperature absolutely sensitivity of sandwich structured Gd-2(MoO4)(3): Er3+/Yb3+ reaches 0.013 K-1 at 498 K, which indicate this sandwich structured thin films have larger potential in thermal sensors. This sandwich structure might extend the applications of Ln(3+)-doped materials in super-resolution imaging and temperature sensing.

• 出版日期2018-10
• 单位哈尔滨工业大学; 哈尔滨学院