Overview

Photoluminescence (abbreviated as PL) is a process in which a substance absorbs photons (electromagnetic radiation) and then radiates photons back out. Quantum mechanically, this can be described as an excitation to a higher energy state and then a return to a lower energy state accompanied by the emission of a photon. This is one of many forms of luminescence (light emission) and is distinguished by photoexcitation (excitation by photons), hence the prefix photo-. The period between absorption and emission is typically extremely short, in the order of 10 nanoseconds. Under special circumstances, however, this period can be extended into minutes or hours. Ultimately, available chemical energy states and allowed transitions between states (and therefore wavelengths of light preferentially absorbed and emitted) are determined by the rules of quantum mechanics. A basic understanding of the principles involved can be gained by studying the electron configurations and molecular orbitals of simple atoms and molecules. More complicated molecules and advanced subtleties are treated in the field of computational chemistry.

Full Product Details

Author:   Harry K Wright ,  Grace V Edwards
Publisher:   Nova Science Publishers Inc
Imprint:   Nova Science Publishers Inc
Weight:   0.938kg
ISBN:  

9781604565386

ISBN 10:   1604565381
Pages:   341
Publication Date:   01 October 2008
Audience:   College/higher education ,  Postgraduate, Research & Scholarly
Format:   Hardback
Publisher's Status:   Active
Availability:   Out of stock  
The supplier is temporarily out of stock of this item. It will be ordered for you on backorder and shipped when it becomes available.

Table of Contents

Preface; Luminescence of Metastable ZnO Nanostructures; Photoluminescence Characterisation of Luminescence Materials: Halosulphate Phosphors; Role of Mn Concentration in Luminescence of Nanocrystalline ZnS; Low Temperature Photoluminescence Analysis on Properties of CdZnTe Bulk Crystals; Photoluminescence of Si Nanocrystals Embedded in SiO2; Towards an Insight on the Photoluminescence of Disordered Titanates from a Joint Experimental and Theoretical Analysis; Mechanisms Behind Photoluminescent Emission in Scheelite Structures; Microplasma Synthesis of Tunable Photoluminescence Si Quantum Dots; Recent Development of Luminescent Materials Prepared by the Sol-Gel Process; Enhanced Photoluminescence of Rare-Earth Activators in Sol-Gel Derived SiO2 by Energy Transfer from ZnO Nanoparticles and Co-Activators; Studies of Photoluminescence Spectra of InGaN/GaN Heterostructures; Index.

Reviews

Author Information

Tab Content 6

Author Website:  

Countries Available

All regions