3. Contents
What is Photodiode
History & Theory
Features of photodiode
Materials
Types
Photodiode Construction
VI characteristics of photo diode
Applications
Advantages & Disadvantages
Reference
4. What is Photodiode ?
A photodiode is a
semiconductor
device that
converts lights into
current.
5. Photodiode technology developed since 1940s
Photodiode technology was refined in the 1950s
Silicon has been the favoured material for
photodiodes, germanium can also be used, and its
use was first demonstrated in 1962 by Riesz.
History & Theory
6. Excellent linearity with respect to incident
light
Low noise
Wide spectral response
Mechanically rugged
Compact and lightweight
Long life
Features of photodiode
11. Photo diodes are used as photo detectors.
Photo diodes are used in cameras as photo sensors,
Slotted optical switch, in scintillators e.t.c.
Photo diodes are used in consumer electronics.
Applications
12. Advantages:
Photodiode detector are high NIR sensitivity and high
speed.
Low noise
Low dark current
Disadvantages:
Normal PN junction photo diodes have very high
response times.
It has very low sensitivity
Advantages & Disadvantages
13.
14. Thank you all
&
Special thanks to our honorable teacher
Farzana Rahman Mishu
Sr. lecturer
Dept. of Computer Science & Engineering
Faculty of Engineering
15.
16. Created by Mohammad Ali Khan
Dept. Computer Science & Engineering
Faculty of Engineering
University of Development Alternative (UODA)