• Permits charge to be transferred across the entire
surface of the object
• Contains a series of movable charges which are
turned into electricity upon contact with another
• These charges then transfer power to the next
• Resists current flow
• Inhibits the flow of electricity between molecules
due to its high dielectric constant
• May allow flow of charge at a certain amount of
energy applied but there would be a degradation
of the material
• Has intermediate conductivity between a
conductor and an insulator
• Can resist and allow flow of electrons depending on
the energy applied to it
• Commonly used in electronics as transistors or
• Doping is a process wherein impurities are added to
the semiconductor to improve its conductivity
• An extension of molecular orbital theory
• Describes bonding in solids.
• Bands of orbitals that are filled or partially filled by
valence electrons are called valence bands.
• Higher-energy unoccupied bands in which
electrons are free to migrate are called conduction
• Energy gap between the valence and conduction
• Influences the electrical and optical properties of
• Nicolić, B. (n.d). What is Solid State Physics.
Physics and Astronomy-University of
• Penn Engineering-School of Engineering and Applied Science.(n.d.).
Astronomy.(n.d.).Band theory of solids. Retrieved from
Astronomy.(n.d.).The doping of semiconductors. Retrieved from