4. Luminescent materials and their optical properties
Luminescent materials can be divided into two categories: those that emit a broad band and those that emit fine lines. Depending on the desired effect or application, we'll opt for one or the other. This difference in spectral behavior is due to the nature of the electronic orbitals involved in the optical transitions. The dopant ion interacts with its nearest neighbors in the host lattice and the latter's vibrational modes. This coupling is described in a very simplified way, within the framework of the configuration curve diagram, by the harmonic oscillator model. We consider the coupling between electronic states and network vibrations. For further simplification, we assume that the vibratory mode is totally symmetrical (respiratory mode), so that the energy levels can be represented by parabolas whose minimum corresponds to the equilibrium position of the system in the state under consideration....
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
The Ultimate Scientific and Technical Reference
This article is included in
Optics and photonics
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Luminescent materials and their optical properties
Bibliography
Websites
French Lighting Association http://www.afe-eclairage.com.fr
Photovoltaic geographic information system – interactive map https://ec.europa.eu/commission/presscorner/detail/fr/IP_07_447 (accessed April...
Directory
Some laboratories and research centers (non-exhaustive list)
National Solar Energy Institute http://www.ines-solaire.org
Institute for Research and Development in Photovoltaic Energy (IRDEP) http://www.irdep.cnrs-bellevue.fr
...
Exclusive to subscribers. 97% yet to be discovered!
You do not have access to this resource.
Click here to request your free trial access!
Already subscribed? Log in!
The Ultimate Scientific and Technical Reference