➣ The Structure of Matter Semiconductor Theory
Structure of an Atom
Structure of Semiconductor Materials
Ionization
Structure of an Atom
Structure of Semiconductor Materials
Ionization
The eV, Unit of energy
Conductors
insulators
Semiconductors
Crystal structure of instrinsic semiconductor
Charge carriers in instrinsic semiconductors
Conduction by electrons and holes
Conduction in instrinsic semiconductors
Conductivity of instrinsic semiconductor
Drift Current Densities
Temperature dependence of ni and σi
Effect of light on semicoductor
Effect of temperature mobility (μ)
Effect of temperature on conductivity ()
Effect of energy gap (Eg )
Concentration of Electrons (n) in Conduction Band
Concentration of Holes (p) in valence Band
Law of Mass Action for Extrinsic Semiconductors
Types of impurities
Conduction in n-Type semiconductor
Conduction in p-Type semiconductor
Conductivity of n Type Material
Conductivity of p Type Material
Diffusion current density
Total current density due to drift and diffusion
Voltage Equipment of Temperature
Diffusion of Length L
Recombination
Measurement of Mobility and Conductivity
Thermistos
Advantages of Thermistor
Limitation of Thermistor
Application of Thermistor
Sensistors
Spectral Response
Application of Photoconductive Cells
Commercial Photoconductive Cells
Why CdS Photoconductor cells are widely used ?
Other Photoconductive Devices
Mathematical Analysis
Concentration independent of Distance and E = 0
Concentration Independent of Time and E = 0
Concentration Varies Sinusoidally With Time and E = 0
Diffusion Length (Lp)
Diffusion Currents
Drift Currents
Expression for the potential difference