Question

What is an optoelectronic junction device? Write any two names of optoelectronic junction devices.

Answer 1

Hint: The solution of this question is totally based on the knowledge of study of electronic devices. We need to have a clear concept for electronic devices, diodes, different types of junction etc. If we know about the different types of electronic devices, we can easily define optoelectronic junction devices and give its examples.

Complete solution:
First of all let us find details about a p-n junction.
p-n junction: We know p-n junction as a boundary between two different semiconductors. The names of these semiconductors are p-type and s-type. The p-type is also known as positive side semiconductor and the n-type is known as negative type semiconductor. The p-type has excess holes and on the other hand the n-type has excess electrons. When electrons and holes are scattered then this process is known as doping.
Optoelectronic junction device: When photons generate the charge carriers in a semiconductor material, then the device in which it is used is known as optoelectronic junction device. Generally, it is a type of p-n junction. The common examples of optoelectronic junction are solar cells, photodiode, light emitting diode etc.
Hence, based on our understanding of the electronic device, we have defined optoelectronic junction devices.

Note: Solar cells: Already we know that solar cells are devices that convert light energy into electrical energy.
Photodiode: About photodiode we know it as a device which is generally used to detect optical signals.
Light emitting diode: It is commonly known as LEDs. This device is known for emitting photons of different frequencies of light.