Optoelectronic Devices
Question 1: What are the real-life applications of optoelectronic devices?
Solution:
LED, LASER, photodiode and solar cell are the real-life applications of optoelectronic devices.
Question 2: Explain the Photovoltaic effect.
Solution:
The generation of voltage or electric current in a substance as a result of exposure to light is known as the photovoltaic effect, which is a physical and chemical process.
Question 3: Why do we use a photodiode in reverse bias?
Solution:
A photodiode that is reverse biassed has a wider depletion layer than one that is forward biassed, and it also has a little reverse current (dark current) flowing through it. Under reverse bias, a photodiode greatly increases the amount of incoming light that it converts to current relative to forward bias current.
Question 4: What are the factors on which the color of light emitted by an LED depends?
Solution:
Light-emitting diodes, sometimes known as LEDs, are semiconductors that transform electrical energy into light energy. The type of semiconductor material affects the hue of the light that is emitting. UV, visible, and infrared are the three wavelengths into which LEDs may be categorised.
Question 5: Differentiate between a photodiode and a solar cell.
Solution:
A photodiode cell works with an external bias while a solar cell doesn’t work with any external bias.
Question 6: What is the value of the typical operating current for a light-emitting diode?
Solution:
The value of the typical operating current for a light-emitting diode is approximately 5 to 20 mA.
Related Resources
Optoelectronic Devices
Optoelectronics is the research, design, and production of a hardware device that transforms electrical energy into light and light into energy using semiconductors. It is the connection between optics and electronics. Optoelectronic devices are special types of semiconductor devices that are able to convert light energy to electrical energy or electrical energy to light energy. Solid crystalline minerals, which are heavier than insulators but lighter than metals, are used to make this device. An optoelectronic device is an electrical gadget that uses light. Numerous optoelectronics applications, including those in the military, telecommunications, automatic access control systems, and medical equipment, use this technology.