Semiconductor Theory Library

Semiconductor Theory Library

➣ Semiconductor Theory : Introduction

➣ The Structure of Matter   

        Structure of an Atom

        Structure of Semiconductor Materials

                Properties of Intrinsic Materials

        Ionization

➣ The energy Band Theory   

        The eV, Unit of Energy

➣ Classification of Materials Based on Energy Band Structure

        Conductors
        Insulators
        Semiconductors

➣ Intrinsic Semiconductors

        Crystal Structure of Intrinsic Semiconductor
        Electrons and Holes in Intrinsic Semiconductors
        Conduction by Electronic and Holes
        Conventional Current
        Conductivity of Intrinsic Semiconductor
        Recombination of Electronic and Holes

➣  Drift Current

        Drift Current Densities

 ➣ Mobility of Charged Particle

➣ General Expression for Conductivity

➣ Conductivity of a Semiconductor

➣ Conductivity of Intrinsic Semiconductor     

        Temperature Dependence of ni and σi.
        Effect of Light on Semiconductor
        Effect of Temperature on Mobility (μ)
        Effect of Temperature on Conductivity (σ)
        Effect on Energy Gap (EG)

➣ Carrier Concentrations in an Intrinisc Semiconductor and Fermi Level

        Concentration of Electrons (n) in Conduction Band
        Concentration of Holes (p) in valence Band

➣ Law of Mass Action    

        Law of Mass Action for Extrinsic Semiconductors

➣ Extrinsic Semiconductors

        Types of Impurities

➣ n-Type Semiconductor

        Conduction in n-Type Semiconductor

➣ p-Type Semicondcutor 

        Conduction in p-type Semiconductor

➣  Conductivity of Extrinsic Semiconductor

        Conductivity of n Type Material
        Conductivity of p Type Material

 ➣ Carrier Concentrations in Extrinsic Semiconductors  

➣  Fermi Level in Extrinsic Semiconductor  

➣ Equation of Charge Neutrality

➣  Electrical Properties of Ge and Si

➣  Diffusion in Semiconductors

        Diffusion Current Density
        Total Current Density Due to Drift and Diffusion

➣ Einstein's Relationship

        Voltage Equipment of Temperature

➣  Carrier Lifetimes

        Diffusion of Length L

➣ Excess Carriers

        Recombination

➣ Hall Effect

        Measurement of Mobility and Conductivity

➣ Conductivity Modulation   

        Thermistor
                Advantages of Thermistor
                Limitation of Thermistor
                Application of Thermistor
                Sensistors

➣  Photoconductors

        Spectral Response
        Application of Photoconductive Cells
        Commercial Photoconductive Cells
        Why CdS Photoconductor cells are widely used ?
        Other Photoconductive Devices

➣ Generation and Recombination of Charges 

        Mathematical Analysis

➣ Continuity Equation   

       Concentration independent of Distance and E = 0
       Concentration Independent of Time and E = 0
       Concentration Varies Sinusoidally With Time and E = 0

➣ Injected Minority Carrier Charge  

        Diffusion Length (Lp)
        Diffusion Currents
        Drift Currents

➣ Potential Variation in a Continuously Graded
        Expression for the Potential Difference