Rare‐earth Based Insulating Nanocrystals: Improved Luminescent Nanophosphors for Plasma Display Panels

Abstract

The plasma display panel (PDP) is largely attributed as a big screen flat display panel because of its fast response, wide viewing angle, low energy consumption, and some other advantages. The performance of commercially available PDP phosphors is not sufficient for practical applications, mainly due to instability in blue phosphors, poor color chromaticity in red phosphors, long decay time in green phosphors, and their low brightness. From the PDP point of view, the phosphor should have good luminescence efficiency as well as high color purity. Additionally, in PDPs, phosphors are excited by vacuum ultra violet (VUV) radiation, especially by 147 and 173 nm radiations from inert gas plasma, which shows the unique requirement for PDP phosphors -they can only be excited by the higher VUV excitations. The luminous efficiency and lifetime of plasma display panels (PDPs) are directly related to the performance of phosphors used in PDPs. As a result, higher efficiency, higher stability against high temperature processes, and a long lifetime along with good color chromaticity against vacuum-ultraviolet (VUV) radiation are major concerns in selecting suitable phosphors for PDPs. In order to achieve the same objectives, the present book chapter looks inside the development of the rare-earth based insulating nanocrystals to improve the performance of PDPs. These nanophosphors were studied for their luminescence properties under VUV excitations in view of their luminous efficiency, lifetime, higher stability against time, and high temperature processes as these properties

Comparison of luminescent properties of Y2O3:Eu3+ and LaPO4:Ce3+, Tb3+ phosphors prepared by various synthetic methods

“…Understanding and enhancing the luminescence output of nanophosphors is important for applications such as displays, sensors, scintillators and lighting [1][2][3][4]. Among the numerous phosphors, europium-activated yttrium oxide (Y 2 O 3 :Eu 3+ ) has been widely used as a red-emitting phosphor in fluorescent lamps, high resolution projection devices and displays [5,6].…”