Journal of Sensors / 2009 / Article / Fig 12

Review Article

Receptor Function and Response of Semiconductor Gas Sensor

Figure 12

Schematic diagram of electrostatic equilibrium for large semiconductor crystals under exposure to oxygen. Ec: conduction band edge, Ec: valence band edge, EF: Fermi level, 𝑄 s c : surface charge density, 𝑀 : depletion depth, π‘ž 𝑉 : potential energy of electrons, π‘ž 𝑉 𝑠 : surface potential energy barrier [37].

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