Ozawa Cathodoluminescence and Photoluminescence

Theories and Practical Applications
1. Auflage 2010
ISBN: 978-1-4200-5273-2
Verlag: Taylor & Francis
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)

E-Book, Englisch, 168 Seiten

Written by a senior industry expert with nearly 40 years of hands-on experience, Cathodoluminescence and Photoluminescence: Theories and Practical Applications presents a thorough review of advances, challenges, and recommendations for improving photoluminescent (PL) and cathodoluminescent (CL) phosphor display devices in terms of energy efficiency, image quality, color fidelity, operational lifetime, and production cost.

This book traces the development of cathode ray tubes (CRTs), PL and CL phosphor screens, and fluorescent lamps (FL) into modern phosphor display devices. The author relates luminescence phenomena and color to chemical composition, excitation mechanisms, energy conversion efficiencies, and bulk properties of phosphor particles. He also addresses image quality issues such as flickering, smearing, whitening, and contrast. Subsequent chapters focus on powder deposition techniques and the production of phosphor powders themselves. The text describes the necessary raw materials, flux materials, and growth conditions for producing ZnS powders. It provides a quantitative analysis on optimal processes and parameters for ensuring higher quality color and screen resolution.

Offering a detailed guide for next-generation scientists and engineers in the field, Cathodoluminescence and Photoluminescence describes current technologies and promising developments for producing higher quality, energy-efficient, and long-lasting phosphor CR and flat CL screen displays.

Zielgruppe

Scientists and engineers in the display industry, electrical engineering, electronics, device technology, optical engineering, and materials science.

Autoren/Hrsg.

Ozawa, Lyuji

Fachgebiete

• Technische Wissenschaften Elektronik | Nachrichtentechnik Elektronik Bauelemente, Schaltkreise

Inhaltsverzeichnis

INTRODUCTION

LUMINESCENT PROPERTIES GENERATED IN PHOSPHOR PARTICLES
Excitation Mechanisms of Luminescence Centers
Transition Probability of Luminescent Centers
Short Range, Rather than Long Range, Perfection for Phosphors
Number of Luminescence Centers Involved in the Measurement of Luminescence Intensities
Optimal Particle Sizes for Practical Phosphors
Stability of Luminescence Centers in Phosphor Particle
Voltage Dependence Curve of CL Intensities
Energy Conversion Efficiencies of CL Phosphors

IMPROVED LUMINANCE FROM THE PHOSPHOR SCREEN IN DISPLAY DEVICES
Improvements in the Screen Luminance of Color CRTs
Correlation between Screen Luminance and Spot Luminance
Image Luminance on Screens Perceived by the Human Eye
Lifetime of CL Phosphor Screens in CRTs
Flat CL Displays

IMPROVING THE IMAGE QUALITY OF PHOSPHOR SCREENS IN CL DISPLAYS
Threshold Resolution Power of the Human Eye
Survey of the Origin of Flickers
Powdered Screens Rather than Thin-Film Screens
Electric Properties of Bulk of CL Phosphor Particles in Screens
Optical Properties of Bulk Phosphor Particles

THE SCREENING OF PHOSPHOR POWDERS ON FACEPLATES
The Ideal Phosphor Screen
Practical Problems in Drying the Unwedged Phosphor Screen
Optimal Thickness of Phosphor Screens in CL Devices
Particle Size for High Resolution of Monochrome CL Images
Photolithography on Ideal Phosphor Screens
Practical Phosphor Screens

THE PRODUCTION OF PHOSPHOR POWDERS
Required Purity of Raw Materials for Phosphor Production
Source of Oxygen Contamination
Eradication of Oxygen from Heating Mixture
Identification of Flux Material for Growth of ZnS Particles
Growth of ZnS Particles in a Crucible
Heating Program of Furnace for ZnS Phosphor Production
Removal of By-Products from Produced ZnS Phosphor Powders
Production of Practical ZnS Phosphor Powders
Production of Y2O2S Phosphor Powders

THE DESIGN OF SCREENABLE PHOSPHOR POWDERS FOR CATHODOLUMINESCENT DEVICES

CONCLUSION

REFERENCES