What is the difference between photoemissive , photovoltaic and photo conductive cells ? Explain in detail.
Answers
In photovoltaic mode the photodiode is zero biased. The flow of current out of the device is restricted and a voltage builds up. This mode of operation exploits the photovoltaic effect, which is the basis for solar cells. The amount of dark current is kept at a minimum when operating in photovoltaic mode.
In photoemissive type devices, once the radiation drops over a cathode can cause emission of electrons from the cathode plane. photoelectric-transducer. The output of the PV cells can generate a voltage which is relative to the intensity of radiation.
Answer:
The difference between these two classifications is that photoconductive detectors use the increase in electrical conductivity resulting from increases in the number of free carriers generated when photons are absorbed (generation of current), whereas photovoltaic current is generated as a result of the absorption of ...