What is the relation between photocurrent and wavelength?

What is the relation between photocurrent and wavelength?

As the wavelength of the incident light decreases near the bandgap, the photocurrent will first increase due to an increase in the absorption, and as the wavelength continues to decrease, more and more carriers will be generated near the surface region.

Why does photocurrent decrease as wavelength increases?

Increasing the wavelength essentially decreases the photon energy. So, the kinetic energy of the emitted photoelectrons will decrease to the point where there will not be enough energy to overcome the metal work function, at which point no more photoelectrons will be emitted.

Does photocurrent depend on wavelength of light?

A. Depends both on intensity and frequency of the incident light. Does not depend on the frequency of incident light but depends on the intensity of the incident light. …

What happens to photoelectric current If wavelength?

1. In the photoelectric effect light which strikes a metal causes electrons to be emitted. As the wavelength decreases for a specified metal, the speed (and thus the Kinetic Energy) of the emitted electrons increases.

How does photocurrent vary?

A higher intensity of radiation produces a higher value of photocurrent. For the negative potential difference, as the absolute value of the potential difference increases, the value of the photocurrent decreases and becomes zero at the stopping potential.

Does photocurrent increase with frequency?

At a particular fixed frequency of incident radiation the rate of the emission of photo electrons i.e. the photocurrent increases with increase in the intensity of the incident light. Photo electric effect does not occur at frequency less than threshold frequency.

Does photocurrent depend on frequency?

does not depend on the frequency of incident light but depends on the intensity of the incident light.

What is photocurrent in photoelectric effect?

Photocurrent is the electric current through a photosensitive device, such as a photodiode, as the result of exposure to radiant power. The photocurrent may occur as a result of the photoelectric, photoemissive, or photovoltaic effect. The highest (maximum) value of the photo-current is called saturation current.

How is photocurrent depends on the intensity?

Why is photocurrent independent of frequency?

Originally Answered: Why is photoelectric current independent of frequency? Because frequency doesn’t determine the number of electrons emitted. Magnitude of the photoelectric current is determined by the numbers of electrons emitted per unit area and not energy of the emitted electrons.

What are different factors on which photocurrent depends on?

The photocurrent generated depends on the following factors:

• 1) Frequency of the incident light.
• 2) The intensity of incident radiation:
• 3) The potential difference between the electrodes:

What is photocurrent spectroscopy?

Photocurrent spectroscopy is a powerful, nondestructive, in situ technique which has been. used to probe the semiconductor properties of anodic films on a variety of metals. In this paper the quantitative aspects of photocurrent spectroscopy are illustrated with examples taken from studies of lead in sulfuric acid.