The Physical Properties Of Organic Monolayers


Book Description

This book provides a fundamental physical picture of various phenomena occurring in organic monolayers, dealing with dielectric, elastic, and electronic properties. The dielectric properties are discussed in terms of orientational order parameters, which are used to interpret the dielectric spectrum observed through Maxwell displacement current measurement and optical second harmonic generation measurement. The elastic theory of organic monolayers is based on that of liquid crystals and emphasis is placed on the interfacial effect when discussing the electronic properties of organic monolayers. The discussion in the book mainly concerns the structure dependence (dipole moment) and thickness dependence (interfacial effect) for various phenomena occurring in organic monolayers.




The Physical Properties of Organic Monolayers


Book Description

Ch. 5. Dielectric relaxation phenomena. 5.1. Rotational Debye Brownian motion model. 5.2. Relaxation process at an air-water interface. 5.3. Determination of dielectric relaxation time. 5.4. Summary. References -- ch. 6. Chiral phase separation. 6.1. Elastic energy and Bragg-Williams mixing energy. 6.2. Chiral phase separation. 6.3. Discrete one-dimensional CPS solution. 6.4. Summary. 6.5. Appendix. References -- ch. 7. Nonlinear effects. 7.1. SOS in orientational order parameters for C[symbol] monolayers. 7.2. Chirality representation. 7.3. SHG-CD effect. 7.4. SHG-MDC measuring system. 7.5. Quantum mechanical analysis of photoisomerization. 7.6. Summary. References -- ch. 8. Thermally-stimulated current. 8.1. Thermally-stimulated current. 8.2. Depolarization due to thermal stimulation. 8.3. TSC experiment. 8.4. Phase transition. 8.5. Thermodynamics approach to monolayers. 8.6. Summary. References -- ch. 9. Electronic properties at MIM interfaces. 9.1. Tunneling current and electronic device applications. 9.2. Nanometric interfacial electrostatic phenomena in ultrathin films. 9.3. I-V characteristic. 9.4. Summary. References.







Maxwell Displacement Current And Optical Second-harmonic Generation In Organic Materials: Analysis And Application For Organic Electronics


Book Description

The probing and modeling of carrier transport in materials is a fundamental research subject in electronics and materials science. According to the Maxwell electromagnetic field theory, there are two kinds of currents, i.e., conduction current and Maxwell displacement current (MDC). The conduction current flows when electronic charges, e.g., electrons and holes, are conveyed in solids, whereas MDC is the transient current that is generated due to the change of electric flux density. The source of conductive current is charged particles, i.e., electrons, holes, ions, etc., and the source of MDC is also the charged particles. It is therefore anticipated that we can probe and model carrier transport in materials, in terms of 'MDC'. In other words, we can find a novel way for modeling and analyzing materials on the basis of Dielectric Physics Approach, on focusing dielectric polarization phenomena. Maxwell Displacement Current and Optical Second-Harmonic Generation are basically dielectric phenomena. The aim of this book is to show the dielectric physics approach for the study of molecular materials and organic electronics devices related to carrier transport and dielectric polarization, on focusing Maxwell Displacement Current and Optical Second-Harmonic Generation in Organic Materials from viewpoints of Analysis and Application for Organic Electronics.










JJAP


Book Description










Organic Field-Effect Transistors


Book Description

The remarkable development of organic thin film transistors (OTFTs) has led to their emerging use in active matrix flat-panel displays, radio frequency identification cards, and sensors. Exploring one class of OTFTs, Organic Field-Effect Transistors provides a comprehensive, multidisciplinary survey of the present theory, charge transport studies, synthetic methodology, materials characterization, and current applications of organic field-effect transistors (OFETs). Covering various aspects of OFETs, the book begins with a theoretical description of charge transport in organic semiconductors at the molecular level. It then discusses the current understanding of charge transport in single-crystal devices, small molecules and oligomers, conjugated polymer devices, and charge injection issues in organic transistors. After describing the design rationales and synthetic methodologies used for organic semiconductors and dielectric materials, the book provides an overview of a variety of characterization techniques used to probe interfacial ordering, microstructure, molecular packing, and orientation crucial to device performance. It also describes the different processing techniques for molecules deposited by vacuum and solution, followed by current technological examples that employ OTFTs in their operation. Featuring respected contributors from around the world, this thorough, up-to-date volume presents both the theory behind OFETs and the latest applications of this promising technology.