Abstract
This work pertains to Cr3+ and Nd3+ co-activated Ca2MgWO6 phosphors synthesized by high temperature solid-state method using oxides and carbonates as raw materials. All luminescent samples according to Ca2MgWO6:Cr3+,Nd3+ include Cr3+ for the absorption of UV and visible radiation (230–800 nm) prior to energy transfer to Nd3+. As a result of the energy transfer between Cr3+ and Nd3+, we observe line emission originating from Nd3+ in the near infrared range additionally to the broad band near infrared emission from Cr3+ assigned to the spin-allowed 4T2 → 4A2 transition. The energy transfer from Cr3+ to Nd3+ is discussed via the variations of the lifetime data of Cr3+ and Nd3+. The strong absorption of Cr3+ in the ultraviolet range and the efficient energy transfer from Cr3+ to Nd3+ indicate that the herein presented material type can serve as a radiation converter for near infrared region light emitting diodes (NIR-LEDs) comprising an UV-A emitting (Al,Ga)N chip.
Highlights
Cr3+ is a widely applied activator ion in phosphors or solid state lasers emitting in the near infrared region (NIR) [1]
NIR radiation sources have a broad area of application in biomedical imaging, phototherapy, thermography, optical communication, and environment monitoring [2,3,4,5,6]
Incandescent and halogen lamps, silicon carbide heating elements, as well as GaAs or (Al,Ga)As LEDs are commonly used as NIR emitters
Summary
Cr3+ is a widely applied activator ion in phosphors or solid state lasers emitting in the near infrared region (NIR) [1]. The rare earth ion Nd3+ offers suitable energy levels which, subsequent to an excitation process, lead to emission in the near infrared range and is well suited for application as a luminescent converter [8].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: 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.
