The discussion centers around the operation of photodiodes, specifically why they are typically operated in reverse bias rather than forward bias. Participants explore the implications of biasing on the depletion region, sensitivity, and current generation in photodiodes.
Participants express varying views on the effects of biasing on photodiode performance, with no consensus reached on the necessity of biasing for optimal operation.
Participants mention the relationship between biasing and the depletion region but do not fully resolve the implications of operating in different bias states or the conditions under which reverse current can be generated.
hanii said:so if we operate it in forward bias...the depletion layer length would be less compared to that as in reverse biased condition...there by reducing its sensitivity . why only the depletion layer is exposed to light... not all the device..?
hanii said:so biasing only helps to improve the reverse current ...?? if it is so...can we get the reverse current flow through the load and produce potential difference across it without biasing the diode...??