Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1811887 | Physica B: Condensed Matter | 2011 | 4 Pages |
Abstract
Near infrared-visible upconversion in Er3+ doped orthorhombic PbF2 compound is investigated. It is experimentally observed that the red emission intensity increases monotonously with Er3+ concentration increase, while the green emission intensity first increases and then decreases. Based on the rate-equation, the energy transfers involved in the upconversion processes have been explored. It is shown that due to the different multipolar nature for the energy transfer processes of 2H11/2 (4S3/2)+4I15/2â4I9/2+4I13/2 and 4I11/2+4I11/2â4F7/2+4I15/2, the green and red upconversion emissions depend on Er3+ concentration in different ways. The theoretical results are in good agreement with the experimental observation. It is shown that the upconverted emission bands can be tuned by controlling Er3+ concentration in orthorhombic PbF2 compound, which has many photonic applications under NIR excitation.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
G.Y. Tan, Xiaoliang Yang, Siguo Xiao,