Infrared and Laser Engineering, Volume. 48, Issue 5, 521004(2019)
Ion clustering in YAG:Ce, Yb near-infrared down-conversion phosphors
457 nm and 915 nm continuous lasers were used to study the Yb3+ near-infrared luminescence and up-conversion energy transfer mechanisms in YAG:Ce, Yb phosphors synthesized via solid-state reaction and sol-gel method. Under either excitation, sol-gel samples demonstrated the same Yb3+ near-infrared luminescence quenching concentration of -5%, with similar trends. In solid-state reaction samples, 915 nm excitation yielded a quenching concentration of -5%, while 457 nm excitation resulted in a quenching concentration of 10%, indicating a less homogeneous distribution of dopant ions. Visible up-conversion luminescence from Yb3+-impurity ion and Yb3+-Yb3+ ion pairs can be observed. Solid-state reaction samples demonstrate stronger cooperative luminescence from Yb3+-Yb3+ ion pairs. The results show that clustering of Yb3+ ions is more significant in samples synthesized via solid-state reaction, which could lower the near-infrared down-conversion efficiency of this type of material.
Get Citation
Copy Citation Text
Tang Liang, Ye Huiqi, Xiao Dong. Ion clustering in YAG:Ce, Yb near-infrared down-conversion phosphors[J]. Infrared and Laser Engineering, 2019, 48(5): 521004
Received: Dec. 10, 2018
Accepted: Jan. 20, 2019
Published Online: Jun. 22, 2019
The Author Email: