Polycrystalline and Spatially Non-Homogenous Amorphous Semiconductors de Valeri Ligatchev

Polycrystalline and Spatially Non-Homogenous Amorphous Semiconductors

Valeri Ligatchev

The book is devoted to theoretical investigations of interrelations in between morphology, single-electron spectrum, and optical properties of polycrystalline and spatially non-homogeneous amorphous semiconductors.

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Cuprins

Preface; Introduction and Historical Backgrounds; Single-Electron Spectrum of Polycrystalline and Amorphous Semiconductors: Standard Models; Phonon Confinement Phenomenon and Correlation Length of Disorder; Morphology, Long Range Potential Fluctuations, and Properties of a-Si:H; Morphology, Structural Disorder, Phonon Confinement, and Optical Absorption of Polycrystalline DLC; Generalized Skettrup Model for Density of Single-Electron States in Polycrystalline Semiconductor; Phonon Fluctuations and Electron Levels in Solids; Generalized Skettrup Model; Simulation Parameters and Spectrum of Density of Electron States in DLC; Thermal Equilibrium, Frozen-In Phonons and Defects in Amorphous Semiconductors; GSM Modification for Amorphous Semiconductors; Single-Electron Density of States in Amorphous Semiconductor; Phonon Fluctuations and Defect Density in a-Si:H Films; GSM Applicability to Amorphous Semiconductors with Partially Ionic Valence Bonds; Spectrum of Optical Absorption Coefficient and Optical Parameters in GSM; Optical Properties of a-Si:H Films, Prepared by Glow Discharge Technique; Role of Hydrogen in a-Si:H Formation; Spatial Extent of Phonon Confinement and Magnitude of the Potential Fluctuations of Disordered Solids; Optical Parameters of DLC, A-SI:H and A-SIC:H Layers with Granular, Columnar and Conical Morphologies; Condensation Regimes, Morphology and Composition of DLC, a-Si:H and a-SiC:H Samples; Techniques and Results of Optical Measurements; Interpretation of Optical Data: Preliminary Analysis; Simulated Density of Electron States and Spectra of Optical Absorption in DLC, A-SI:H, A-SIC:H; Subgap Optical Absorption in DLC; Optical Spectra and Morphology of a-Si:H and a-SiC:H Films; Density of Single-Electron States in Non-Homogeneous DLC, a-Si:H and a-SiC:H Films; Conclusion; Index.