Applications of Semiconductors - Semiconductor - Engineering Physics 1

TL;DR

Semiconductors are widely used in LEDs, Zener diodes, and photovoltaic cells, providing various applications such as signage boards, 7-segment displays, and solar panels.

Transcript

elephants so far we have studied about the working mechanism and constructions of semiconductors now let's have a look on how the applications of semiconductors is there in real world now semiconductors are basically used in LEDs Zener diodes and photovoltaic cell now let's start with the first LED now LED stands for light emitting diode well you s... Read More

Key Insights

• 🏂 LEDs are extensively used in various applications, including televisions, signage boards, traffic signals, and 7-segment displays.
• ⚡ Zener diodes serve as voltage regulators and have a stable breakdown voltage.
• 🖐️ Photovoltaic cells play a crucial role in solar panel technology, providing a direct current output.
• ℹ️ Semiconductors contribute to energy efficiency and are essential in the development of renewable energy sources.

Questions & Answers

Q: Why are LEDs preferred over filament tubes?

LEDs are preferred due to their energy efficiency. Their power consumption is much lower than traditional filament tubes and neon lights, making them more cost-effective and environmentally friendly.

Q: How does a Zener diode work in reverse biased mode?

A Zener diode maintains a stable breakdown voltage until it reaches the avalanche breakdown point. It is useful as a voltage regulator, ensuring a constant voltage across the load.

Q: Can a Zener diode be used in forward bias?

Yes, a Zener diode can be used in forward bias mode, but it functions similarly to a regular PN junction diode. Its special property lies in its reverse biased mode, where it acts as a voltage regulator.

Q: What type of current does a photovoltaic cell emit?

A photovoltaic cell emits a direct current (DC). To use it with household appliances, an inverter is required to convert the DC current into alternating current (AC).

Summary & Key Takeaways

• Semiconductors are used in LEDs, which emit light and are found in televisions, phones, signage boards, and traffic signals.

• Zener diodes, used in reverse biased mode, act as voltage regulators, maintaining a stable breakdown voltage.

• Photovoltaic cells, also known as solar cells, absorb sunlight and convert it into electricity through the recombination of electrons and holes.