Oxide Semiconductors for Solar Energy Conversion: Titanium Dioxide, 1st Edition (Paperback) book cover

Oxide Semiconductors for Solar Energy Conversion

Titanium Dioxide, 1st Edition

By Janusz Nowotny

CRC Press

424 pages | 291 B/W Illus.

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Description

Oxide semiconductors, including titanium dioxide (TiO2), are increasingly being considered as replacements for silicon in the development of the next generation of solar cells. Oxide Semiconductors for Solar Energy Conversion: Titanium Dioxide presents the basic properties of binary metal oxide semiconductors and the performance-related properties of TiO2 as they relate to solar energy.

The book provides a general background on oxide semiconductors based on binary oxides and their solid solutions, including electronic and ionic conductors. It covers several aspects of solid-state electrochemistry of oxides, such as defect chemistry, and defect-related properties, such as electrical properties, diffusion, segregation, and reactivity. The author also takes a pioneering approach in considering bulk versus surface semiconducting properties, showing how they are different due to the effect of segregation.

One of the first on semiconducting, photocatalytic, and photoelectrochemical properties of TiO2 and its solid solutions with donor- and acceptor-type ions, the book discusses defect chemistry of TiO2 in terms of defect equilibria and defect-related properties, including electrical properties, self and chemical diffusion, surface properties, segregation, and reactivity and photoreactivity with oxygen, water, and microbial agents. The text also illustrates the use of TiO2 as an emerging material for solar energy conversion systems, including the generation of hydrogen fuel by photoelectrochemical water splitting, the photocatalytic purification of water, and the generation of photovoltaic electricity. In addition, it presents defect disorder diagrams for the formation of TiO2-based semiconductors with controlled properties.

Encompassing the areas of solid-state science, surface chemistry, and photocatalysis, this book reflects the increasing awareness of the importance of structural imperfections, such as point defects, in understanding the properties of metal oxides, specifically TiO2-based semiconductors.

Reviews

… first comprehensive view on all the diverse properties of this material. … It is of invaluable importance for the entire materials science community. The book may be used as textbook for academic classes and researchers interested in the application of titania and titania-based materials. … The readers may find a wide range of materials data on mass and charge transport kinetics, segregation as well as a wide range of alternative defect-related properties of TiO2. Since assignable problems are given for each chapter, the book is also very useful for graduate classes in Materials Science and Engineering. It is a must for a wide community of researchers and developers.

—Werner Weppner, International Journal of Hydrogen Energy 37, 2012

The present book provides a comprehensive survey of defect chemistry and defect-related properties of oxides, including electronic structure, charge transport, diffusion, and segregation. … [This] book is probably the only survey on semiconducting and photocatalytic properties of TiO2 at present, particularly with respect to inclusion of the importance of defect chemistry. The research of the author in this area has attracted the prestigious award of the International Association for Hydrogen Energy. This book should be welcomed by the large research community interested in oxide semiconductors in general and TiO2 in particular, as well as the growing community interested in photocatalysis.

—Professor Eric D. Wachsman, University of Maryland

This book of Prof. Nowotny is addressing the increasingly urgent need for a treatise on oxide semiconductors in general and TiO2-based semiconductors in particular. … This book, which is the first extensive survey on the science of TiO2, will be of great help to the research community involved in the studies of the properties of TiO2.

—Professor Sebastian Fiechter, Helmholtz-Centre Berlin for Materials and Energy

Table of Contents

Solid-State Electrochemistry of Binary Metal Oxides

Structural Defects

Nonstoichiometry

Point Defects in Binary Metal Oxides

Band Model

Electrical Properties

Effect of Interfaces

Diffusion

Oxygen Ion Conductors

Concluding Remarks

Light-Induced Effects

Solar Radiation

Solar Energy Spectrum

Light Source

Light-Induced Effects in Semiconductors

Data Reproducibility

Energy Conversion Efficiency

Light Measurements

Concluding Remarks

Basic Properties of TiO2

Titanium Oxides

Titanium TiO2

Concluding Remarks

Defect Chemistry

Undoped TiO2

Doping with Aliovalent Ions

Reactivity of TiO2 with Hydrogen

The Real Chemical Formula of TiO2

Concluding Remarks

Electrical Properties

Introduction

Electrical Conductivity

Thermoelectric Power

Jonker Analysis

Work Function

Surface Photovoltage Spectroscopy

Hall Effect

Coulometric Titration

Concluding Remarks

Diffusion

Mass Transport Kinetics

Self-Diffusion

Chemical Diffusion

Concluding Remarks

Effect of Interfaces

Effect of Surface Properties on Reactivity

Segregation

Reactivity

Concluding Remarks

Applications

Introduction

Performance-Related Properties

Solar Hydrogen

Hydrogen Generation by Photoelectrochemical Water Splitting

Solar Water Purification

Alternative Applications

Summary and Concluding Remarks

Appendix

Index

References and Problems appear at the end of each chapter.

About the Author

Janusz Nowotny is a professor of solar energy technologies at the University of Western Sydney. He has been a recipient of the Sir William Grove Award of the International Association for Hydrogen Energy and the Pfeil Award of the Institute of Materials, Minerals and Mining in London. Dr. Nowotny was the director of a NATO Advanced Research Workshop on Nonstoichiometric Compounds — Surfaces, Grain Boundaries and Structural Defects. He was also the founder and co-organizer of two series of International Workshops: Nonstoichiometric Compounds and Ceramic Interfaces.

About the Series

Green Chemistry and Chemical Engineering

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Subject Categories

BISAC Subject Codes/Headings:
SCI013060
SCIENCE / Chemistry / Industrial & Technical
TEC010000
TECHNOLOGY & ENGINEERING / Environmental / General
TEC021000
TECHNOLOGY & ENGINEERING / Material Science
TEC023000
TECHNOLOGY & ENGINEERING / Metallurgy