Electronic Phenomena in Adsorption and Catalysis on Semiconductors and Dielectrics

ISBN-13: 9783642830228 / Angielski / Miękka / 2012 / 279 str.

Vsevolod F. Kiselev;Oleg V. Krylov

Opis

It is now firmly established that various adsorptive and catalytic processes taking place on the surface of semiconductors and in MIS structures strongly influence their electronic properties and hence modify the parameters of semi conductor devices. The inverse problem of how the semiconductor's electronic subsystem influences adsorption and dissociation of molecules at the surface has been recognized but much less explored. The main purpose of the present book is to generalize the experimental data and explain the relationship be tween these two classes of phenomena. We also discuss tentative models of surface electronic states and their interaction with adsorbed molecules. The subject of this book should attract the attention of researchers work ing in the overlapping areas of physics and chemistry, and of physics and biology. The research done in this field will help to widen the scope of semi conductor applications by finding novel ways of employing surface effects in the construct ion of mi croe 1 ectroni c devi ces, semi conductor gas ana lysers, solar cells, etc. The authors hope that this book will be useful to a wide circle of chemists and physicists concerned with the study of interphase phenomena and questions of adsorption and catalysis. Certain parts of the book will be helpful to physicists and technicians working in rapidly developing branches of semicon ductor physics and technology. The book can also serve as a textbook for both under- and postgraduates speci al i zi ng in thi s fi e 1 d."

Spis treści

1. Introduction.- 2. The Phenomenological Description of Electronic Processes on Semiconductor Surfaces.- 2.1 Surface-Electron States. Basic Concepts.- 2.2 The Space-Charge Region.- 2.3 Field Effect as a Method of Investigating the Energy Spectrum of the Surface.- 2.4 Alternative Electrophysical Techniques for the Study of Surface States.- 2.4.1 Photoelectric Techniques.- 2.4.2 Capacitance Techniques.- 3. The Energy Spectrum of Semiconductor Surfaces.- 3.1 The Fast States and Recombination Electron States on Real Semiconductor Surfaces.- 3.2 The Energy Spectrum of the Surface from the Standpoint of the Theory of Disordered Systems.- 3.3 Slow Electron States on Real Semiconductor Surfaces.- 3.4 The Energy Spectrum of an Atomically Clean Surface.- 4. Electron Processes in Semiconductor Adsorbents and Catalysts.- 4.1 Electron Processes in Wide-Band Semiconductors (Dielectrics).- 4.2 Disordered Wide-Band Semiconductors.- 4.3 The Energy Spectrum of Wide-Band Semiconductor Surfaces.- 4.4 Polycrystalline Semiconductors.- 5. The Electron Theory of Chemisorption and Catalysis on Ideal Semiconductor Surfaces.- 5.1 Electronic and Adsorptive Equilibrium.- 5.2 The Kinetics of Adsorption and Catalysis.- 5.3 Chemisorption: Electron Theory and Experiment.- 6. The Effects of Adsorption on the Electrophysical Parameters of Real Semiconductor Surfaces.- 6.1 Physical Adsorption.- 6.2 Adsorption of Donor Molecules.- 6.3 Adsorption of Acceptor Molecules.- 6.4 Slow Adsorptive States.- 6.4.1 Concentration of Slow States.- 6.4.2 Parameters of Slow States.- 6.5 The Kinetics of Adsorption and Charge Accumulation on Real Surfaces.- 6.6 The Donor-Acceptor Mechanism of Adsorption and Charging.- 6.7 A Model of a Disordered Real Surface.- 6.7.1 Expansion of the Sample.- 6.7.2 Modification of the Surface Phonon Spectrum.- 7. Catalysis and Electronic Phenomena on Real Semiconductor Surfaces.- 7.1 Ion Radicals on the Surface.- 7.2 Catalytic Activity and Surface Electronics.- 8. The Phonon and Shock Mechanisms of Charge-Carrier Capture in Adsorption and Catalysis.- 8.1 Phonon Excitations in Photoadsorption and Photocatalysis.- 8.2 The Participation of Vibrational Modes of Adsorbed Molecules in the Capture and Recombination of Free Charge Carriers.- 8.3 Dissipation of the Energy of Adsorptive Interactions.- 8.4 On the Possible Role of Auger Effects in Adsorption and Catalysis.- 9. Proton Processes on the Surfaces of Semiconductors and Insulators.- 9.1 Proton Conduction of Adsorbed Water.- 9.2 Photostimulated Dissociation of Adsorbed Molecules.- 9.3 The Effects of Protonic Processes on the Parameters of Surface States.- References.