0
When light decreases, the generation of electron-hole pairs in a photodiode diminishes, leading to a reduction in the minority-carrier concentration. This results in a decrease in the reverse minority-carrier current, as there are fewer charge carriers available to contribute to the current flow. Consequently, the photodiode's response weakens, indicating less sensitivity to light. In essence, decreased light leads to lower photocurrent due to reduced carrier generation.
What else can I help you with?
When current in primary coil decreases current in the secondary coil also decreases?
It is reverse. when load current in the secondary changes the primary current also changes directly. Load current is dependent on the load. I am assuming that the question is related to a normal distribution transformer.
What happens in the depletion region in reverse bias?
in forward biasing depletion region width decreases and in reverse biasing it increases .
What are the sources of reverse current in a diode?
doping concentration,temperature are the major source of reverse current
Why photodiode is reverse biased?
In a photo-diode when light is incident, the fractional increase in the majority carriers is much less than the fractional increase in the minority carriers. Consequently, the fractional change due to the photo-effects on the minority carrier dominated reverse bias current is more easily measurable than the fractional change due to the photo-effects on the majority carrier dominated forward bias current. Hence, photo-diodes are preferred to be used in the reverse bias condition to easily observe the variation of current with intensity.
What is meant by reverse saturation current?
reverse saturation current is produced by the thermal activity of the diode materials. This current: 1- Is temprature dependant; that is, it increases as temprature. 2- Accounts fot the major portion of diode reverse current surface leakage current is produced by contamination on the surface of the device, allowing current flow to bypass the junction
What is the function of photodiode?
A photodiode is a semiconductor device that converts light into electrical current. It is commonly used in optoelectronic devices such as light sensors, solar cells, and barcode scanners. The function of a photodiode is to detect and measure light intensity by generating a current proportional to the incident light.
When current in primary coil decreases current in the secondary coil also decreases?
It is reverse. when load current in the secondary changes the primary current also changes directly. Load current is dependent on the load. I am assuming that the question is related to a normal distribution transformer.
What is reverse causation?
Reverse causation means that expected future increases in output cause increases in the current money supply and that the expected future decreases in output cause decreases in the current money supply, rather than the other way around. More simply said, money growth is higher because people expect higher output in the future.
Why photodiode works only in reverse bias not in forward bias?
The fractional change due to intensity on minority charge carriers is more than on majority charge carriers. When light is directly polarized it acts like a normal diode but when reverse polarized its current depends on the brightness (intensity of incident light).
What is the effect of temperature on photodiode?
photodiodes are basically reverse biased diodes with optical windows that allow like to shine on the PN junction. Like any diode, the leakage current (otherwise known as a photodiodes 'dark' current) increases exponentually with temperature in accordance to William Shockley's idea diode eqation. The other effect in a photo diode is the probability of a photon of a certain energy allowing an electron to cross the PN junction. This is known as the quantum efficiency of the photodiode. Because increasing temperatures increase the vibration of the silicon atoms, making them easier to be knocked loose by a photon. Thus the quantum efficiency of a photodiode will increase with tempature, as well as the thermally induced noise. photodiodes are basically reverse biased diodes with optical windows that allow like to shine on the PN junction. Like any diode, the leakage current (otherwise known as a photodiodes 'dark' current) increases exponentually with temperature in accordance to William Shockley's idea diode eqation. The other effect in a photo diode is the probability of a photon of a certain energy allowing an electron to cross the PN junction. This is known as the quantum efficiency of the photodiode. Because increasing temperatures increase the vibration of the silicon atoms, making them easier to be knocked loose by a photon. Thus the quantum efficiency of a photodiode will increase with tempature, as well as the thermally induced noise. photodiodes are basically reverse biased diodes with optical windows that allow like to shine on the PN junction. Like any diode, the leakage current (otherwise known as a photodiodes 'dark' current) increases exponentually with temperature in accordance to William Shockley's idea diode eqation. The other effect in a photo diode is the probability of a photon of a certain energy allowing an electron to cross the PN junction. This is known as the quantum efficiency of the photodiode. Because increasing temperatures increase the vibration of the silicon atoms, making them easier to be knocked loose by a photon. Thus the quantum efficiency of a photodiode will increase with tempature, as well as the thermally induced noise.
Which type of current does not reverse directon?
Direct current does not reverse direction
Reverse saturation current of Ge diode?
Reverse saturation current of germanium diodeThe current that exists under reverse bias conditions is called the reverse saturation current. Reverse saturation current of the germanium diode is typically 1 micro ampere or 10-6 a.At a fixed temperature, the reverse saturation current of a diode increases with increase in applied reverse bias. In reverse bias region the reverse saturation current also varies with the temperature.
What is diode reverse current?
the current which has negative value n passes through the diode is called as diode reverse current
Current that does not reverse direction?
direct current
What is maximum reverse current?
this is the best current.
What is Reverse Saturation Current of a diode?
When a diode is operated as reverse bias the current flow is almost completely blocked. A small amount of current is still able to travel in reverse through the diode and this is referred to as the reverse current saturation.
What happens in the depletion region in reverse bias?
in forward biasing depletion region width decreases and in reverse biasing it increases .
