Abstract
Ho3+/Yb3+/Tm3+ codoped 12CaO·7Al2O3 single crystal exhibiting upconversion white light under 980nm excitation have been successfully prepared by Czochralski method. CIE coordinate of 0.4mol%Ho3+/2.0mol%Yb3+/0.5mol%Tm3+/C12A7 single crystal under 980nm excitation of 800mW is (0.35, 0.33), which is very close to the white emission center (0.33, 0.33). The color of the upconversion luminescence can be changed by simply adjusting the excitation power. The pump dependence and luminescent decay dynamics suggest that the blue upconversion emissions are populated by a three-photon process, the green emissions are two-photon process, and the red emissions are a combination of two and three photons processes. The upconversion mechanism is analyzed in detail. 12CaO·7Al2O3 single crystal with white upconversion emissions is expected to have broad application prospects in solid-state multicolor display and instrument integration.
Sign-in/Register to access full text options 
Free) 
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 call
