고상법을 이용한 Ho3+/ Tm3+/ Yb3+ 이온들이 동시 첨가된 NaLa(MoO4)2의 조절 가능한 white up-conversion 방출

Abstract

Controllable white upconversion(UC) luminescence was obtained from Tm3+/Ho3+/Yb3+ tri-doped NaLa(MoO4)2. Under the excitation of 980nm laser diode, Tm3+/Ho3+/Yb3+ tri-doped NaLa(MoO4)2 shows bright white UC luminescence composed green and red emission from Ho3+ and blue emission form Tm3+ visible to the naked eyes. The emission intensity of red, blue and green UC emission according to Tm3+/Ho3+ concentrations, which can be controlled from the cool white to the warm white region. In Ho3+/Tm3+/Yb3+ tri-doped NaLa(MoO4)2, the UC luminescent properties on Tm3+ and Ho3+ concentrations a Mechanism based on laser lump power were discussed in detail.