Light sensing device and operational method thereof

Abstract

A light sensing device includes a light receiver that has a first organic photodetector (OPD) unit. The first OPD unit includes a bottom electrode unit, a first transport layer disposed on the bottom electrode unit, an active layer disposed on the first transport layer, a second transport layer disposed on the first active layer, and a top electrode disposed on the second transport layer. The first OPD unit generates a plurality of sensing currents in response to an input light received by the first OPD unit and a plurality of voltages that are applied on the bottom electrode unit simultaneously or sequentially. The light sensing device further includes a processor coupled to the light receiver.

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