Special Purpose P-N Junction Diode
Chapter Name : Semiconductor Electronics: Materials, Devices And Simple Circuits |
Sub Topic Code : 101_12_14_08_05 |
Topic Name : Special Purpose P-N Junction Diode |
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Sub Topic Name : Optoelectronic Junction Devices-Solar Cell |
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Introduction
A photodiode is a type of photo detector capable of converting light into either current or voltage, depending upon the mode of operation.
Pre-Requisites:
Photodiode
Activity:
Silicon (Si) is the most widely used material in semiconductor devices.
Real Life Question:
What is Optoelectronic Junction?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Optoelectronic Junction | Consist of a p-type and n-type region additional to the interaction between the electrons and holes in the semiconductor and light. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| microprocessors | All transistor types can be used as the building blocks of logic gates, which are fundamental in the design of digital circuits. Transistors act as on-off switches; in the MOSFET, for instance, the voltage applied to the gate determines whether the switch is on or off. |
Real life uses :
Building circuits.
Places to visit :
Digital circuits.
Practical examples around us
| Examples | Explainations |
|---|---|
| Solar Cell | Solar cells are typically illuminated with sunlight and are intended to convert the solar energy into electrical energy. |
What you learn in Theory:
Solar cells are typically illuminated with sunlight and are intended to convert the solar energy into electrical energy.
What you learn in Practice:
The power equals the product of the diode voltage and current and at first increases linearly with the diode voltage but then rapidly goes to zero as the voltage approaches the turn-on voltage of the diode.