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quantum world
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Hi all,
when we shine light on semiconductor surface with white light, superband gap transition occurs (VB to CB). Also we have surface state (SS) too, so there is probability of transition from VB to SS and SS to CB as well. The time transient of this surface is similar to charging of a capacitor (in light) and discharging of a capacitor (in dark). Could someone explain physics of this process?
when we shine light on semiconductor surface with white light, superband gap transition occurs (VB to CB). Also we have surface state (SS) too, so there is probability of transition from VB to SS and SS to CB as well. The time transient of this surface is similar to charging of a capacitor (in light) and discharging of a capacitor (in dark). Could someone explain physics of this process?
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