Vol.1, No.2, 2018, pp.95-108, doi: 10.3970/jaop.2018.02756
OPEN ACCESS
ARTICLE
Green Upconversion Emission of Yb3+/Er3+ co-doped Gd2Sn2O7 Nanophosphors as Wide-Range Temperature Sensor
  • Jinsheng Liaoa,*, Liyun Konga, Qi Wanga, Jinqiong Lia, Guanhuai Penga
a,* Correspondence Author, E-mail: jsliao1209@126.com
Abstract
Gd2Sn2O7:Yb3+/Er3+ (abbreviation for GSO: Yb3+/Er3+) nanophosphors codoped with Er3+ (0.1-2 at%) and Yb3+ (0.5-5 at%) were synthesized by a microwave hydrothermal process and annealed at 800 ℃ for 5 h. Powder X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy and upconversion emission spectra were used to characterize the as-synthesized sample. Under the irradiation of 980 nm laser diode, the GSO: Yb3+/Er3+ nanophosphors emitted green emissions centered at 525 and 546 nm (Er3+ :2H11/2→4I15/2 and 4S3/2→4I15/2 transition), red emissions centered at 659 and 677 nm (Er3+:4F9/2→4I15/2 transition). The temperature dependent emission intensity ratio of the thermally coupled levels (2H11/2/4S3/2) of Er3+ in the wide-range of 110-573 K was recorded to study the optical thermometric properties of GSO: Yb3+/Er3+ nanophosphors. The maximum sensitivity of GSO: Yb3+/Er3+ nanophosphors was approximately 36.34x10-4 K-1 at 466 K. This result indicates that GSO: Yb3+/Er3+ nanophosphors are potential candidates for wide-range optical temperature sensors with high sensitivity.
Keywords
Luminescence, Microwave hydrothermal method, Upconversion, Temperature sensing.
Cite This Article
Liao, J., Kong, L., Wang, Q., Li, J., Peng, G. (2018). Green Upconversion Emission of Yb3+/Er3+ co-doped Gd2Sn2O7 Nanophosphors as Wide-Range Temperature Sensor. Journal of Advanced Optics and Photonics, 1(2), 95–108.