MAT Seminar

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 The Lattice Compatibility Theory

The Lattice Compatibility Theory , which I propose to develop together with Turkish colleagues is based on the interaction of doping-element lattice behavior versus host edifice. It states that geometrical  structure  intimately  controls  the  electronic  structure  of  both  molecules  and  solids  and    the  location  of  electrons often  strongly  controls  details  of  the  structure.

This theory has been published and the dicussion is based on the behavior of the matrices of some  materials (SnxSy, SxOy Snx, ZnSy SexSy , transparent conducting oxides TCO,  InxSy , Zn-S-O- ...binary/ternary  doped or undoped compounds, metal oxides. etc.) under doping treatments.

Basic items for this theory  are focused on the following elementary scheme :

- A host Lattice
- A doping element
- A deep knowledge of the way  the whichdoping element stabilizes or not within the host Lattice ( in terms of any parameters ( Urbach energy, Vickers hardness, optothermal expansivity, Faraday effect , band gap  etc. )

 A prelude to the lattice compatibility theory (LCT), has been formulated as follows:

"The stability of  incorporated   agents inside host  structures  is  favored  through geometrical  compatibility,  expressed  in terms  of  matching  patterns  between  introduced  agent  intrinsic  lattice  and  those  of the host".

 Transparent Conducting Oxide TCO Monolayer-Grown Photonic Cell: A Renewable Energy Device for the Future (patent application)

The increasing use of photonic effect cells raised cost, material leakage and environmental issues. During the last three decades, at least four generations of photonic effect cells have competed in order to satisfy growing demands. In this paper, we describe a photonic-effect cell, created from a single metal oxide inside the framework of some recent patents. The presented device is based on a 1?m-thick TCO (Transparent Conducting Oxides) layer deposited by a simple pyrolysis spray setup. This layer, subjected to two successive in situ treatments, is transformed into an n-p junction. The abundance of the used materials, compounds stability, as well as the fabrication low cost, make the realization of serial modules of this cell feasible.