Low Voltage Cathodoluminescence of Mn2+‐Activated ZnGa2 O 4

Abstract

ZnGa2Q and Znl_~Mn~Ga~O4 were investigated as potential low voltage cathodoluminescence phosphors for use in vacuum fluorescent displays. A low-voltage cathodoluminescence spectrophotometer was developed for phosphor characterization. Brightness was measured as a function of anode voltage (10 to 300 V). The effects of activator concentration, phosphor layer thickness, deposition process, and internal pressure were examined. The stability of these oxide phosphors in high vacuum and absence of corrosive gas emission under electron bombardment, offer advantages over commonly used sulfide phosphors.

Spectrum designation and effect of Al substitution on the luminescence of Cr3+ doped ZnGa2O4 nano-sized phosphors

“…Among many oxide phosphors, ZnGa 2 O 4 -based phosphors have been used for low-voltage cathodoluminescence, vacuum fluorescent displays and field emission displays [9][10][11][12]. Under excitation by both ultraviolet light and low voltage electron, ZnGa 2 O 4 exhibits a strong blue emission due to transition via a self-activation (SA) center.…”

Luminescence properties of ZnGa2O4 and ZnAl2O4 spinels doped with Eu3+ and Tb3+ ions

“…ZnGa 2 O 4 and ZnAla 2 O 4 phosphors have gained much attention for use in field emission displays (FEDs) and vacuum florescent displays (VFDs) [1,2] because they exhibit higher chemical stability than commonly used sulfide phosphors. Since ZnGa 2 O 4 and ZnAla 2 O 4 are oxide based phosphors, many of the degradation problems associated with sulfide-based phosphors are avoided.…”

Optical and electrical properties of ZnGa2O4/Mn2+ powder electroluminescent device

“…The EL spectrum is identical to the photoluminescence (PL) spectrum of ZnGa 2 O 4 /Mn 2 + phosphor suggesting that EL and PL mechanism is coming from the same origin. In the previous studies, the PL peak was assigned to the transition from the lowest state ( 4 T 1 ) to the ground state ( 6 A 1 ) in 3d 5 manifold of Mn 2 + ion [6]. Thus, the EL spectrum is assigned as 4 T 1 -6 A 1 transition of Mn 2 + ions.…”