Product Description:
Although amorphous semiconductors have been studied for over four decades, many of their properties are not fully understood. This book discusses not only the most used spectroscopic techniques but also describes their advantages and disadvantages.
Provides information on the most common spectroscopic techniques
?Discusses the advantages and disadvantages of each technique
Contents
Acknowledgments vii
1 Defect States Spectroscopy in Amorphous Semiconductors 1
1.1 Introduction 1
1.2 General Principles 2
2 Thermally Stimulated Depolarization Currents in
Amorphous Chalcogenides 21
2.1 Background 21
2.2 Theoretical Background 23
2.3 TSDCs in Se-Based Amorphous Semiconductors:
Experimental Results 28
2.4 TSDC in Pure Selenium 29
2.5 TSDC in As(Sb) x Se 1 x Alloys 31
3 Carrier Transport Processes in Amorphous Solids 37
3.1 Background 37
3.2 Experimental Techniques for the Measurement of
Carrier Mobility 39
3.3 Significance of Carrier Transport Data in Various
Applications 42
3 .4 Conventional Dispersion Behavior 43
3.5 Anomalous Dispersive Characteristics 44
4 Time-of-Flight Experiments in Amorphous Chalcogenide
Semiconductors 53
4.1 An Apparatus for IFTOF Measurements 56
4.2 XTOF Technique 61
4.3 TOF Measurements in Selenium-Based Amorphous
Multilayer Photoconductors 6 6
5 Xerographic Spectroscopy of States in Mobility Gap 79
5.1 Schematic Overview of the Xerographic Photocopying Process 80
5.2 Xerography in Animation 83
5.3 Xerographic Dark Decay and Photoinduced Effects 85
6 Photoinduced Effects on States in the Mobility Gap 95
6.1 Introduction 95
6.2 Steady-State Photocurrents 9 5
6.3 Light-Induced Effects on Photocurrent Transients 9 6
7 Spectroscopic Studies of Gap States and Laser-Induced
Structural Transformations in Se-Based As-Free Amorphous
Semiconductors 103
7.1 Preparation of Amorphous Films: Essential Results and
Interpretation 103
7.2 The Basic Properties 105
7.3 Dark Discharge 107
7.4 Transient Photoconductivity 108
7.5 Photoinduced Discharge Characteristics 109
7.6 Optical Properties 114
7.7 Structural Transformation 116
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