Challenges For Flat Panel Display Phosphors

Abstract

Phosphors are a class of materials which emit visible light when impacted by either electrons or photons. Phosphors are the critical material in all self-emissive displays. The major display technologies which depend on phosphors are cathode ray tubes, flat cathode ray tubes (especially, field emission displays), thin film electroluminescent displays, and gas discharge plasma displays. Each of these technologies started with phosphors prepared in powder form, sprayed or screen printed onto a faceplate suitable for viewing. Electroluminescent displays have largely converted to thin film phosphors. It can be expected that, for many applications, the other competing technologies will also come to rely on more robust, high definition, thin film phosphors. Presently, full color displays must utilize several deposition and etching procedures to prepare the red, green, and blue pixels. Ion implantation of color centers is now paving the way for producing full color displays in a single host phosphor. We shall discuss the present limitations that compromise full color self-emissive displays, and present state-of-the-art solutions based on thin films and ion implantation.

Electric properties and surface characterization of transparent Al-doped ZnO thin films prepared by pulsed laser deposition

“…ZnO is a promising material for optoelectronic system [1][2][3] applications due to its large direct band gap of 3.3 eV, low power threshold for optical pumping and a large exciton binding energy of 60 meV at room temperature. Doped and undoped ZnO thin films are currently under intense investigation and development for optoelectronic and energy conversion applications.…”

Structural, electrical and optical properties of In2O3:Mo films deposited by spray pyrolysis

“…Transparent conducting oxide (TCO) films such as ZnO, SnO 2 and In 2 O 3 :Sn(ITO), prepared by various deposition methods, have been widely used as transparent electrodes, panel displays, thin film transistors, IR reflectors and heaters [1][2][3][4]. TCO films are materials which exhibit simultaneously high optical transmission and high electrical conductivity.…”

Characterization of Photoluminescent (Y1–xEux)2O3 Thin Films Prepared by Metallorganic Chemical Vapor Deposition

“…Thin-film (Y 1-x Eu x ) 2 O 3 has been deposited by low-pressure metallorganic chemical vapor deposition (MOCVD), 14,15 spray pyrolysis, 16 and pulsed-laser ablation. [17][18][19] Independent of the deposition technique, the as-synthesized films were found to be weakly luminescent and required postdeposition annealing to increase the emission intensity.…”