Abstract
Exploring a new tuning way to facilely realize single-band red emission in trivalent rare-earth ions (RE3+) doped upconversion (UC) materials is still desirable. In this work, the intense single-band red emission is achieved by co-doping only Ho3+ in the BiOCl: Er3+ under 1550 nm excitation. In the BiOCl layered host, co-doping Ho3+ can further enhance the red emission and simultaneously suppress the green emission of Er3+, and thus obviously improve the red-to-green (R/G) ratio. It is found that Ho3+ does not serve as energy trapping through the 5I6 state as in traditional UC materials but acts as ET bridge (4S3/2, 2H11/2 (Er3+) → 5F4, 5S2 (Ho3+) → 4F9/2 (Er3+)). The tuning mechanism of Ho3+ is discussed in detail and further confirms through a comparative experiment. Our research gives an unusual perspective to tune the UC behavior of Er3+ through co-doping Ho3+, which might be inspiring for achievement of single-band red UC emission.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.