FOR CLASS 12 PRACTICAL

2. This is to certify that review and compilation work of the
project report entitled Photodiode is the independent work-
done by Mujammil Khan, Roll No. 2610644 Class-XII,
Science and is submitted to the department of physics, APS
School sec-3,under my supervision and guidance during the
session 2018-19
I wish his all success in future endeavors
Sign
...............................
(INTERNAL EXAMINAR)
Sign
........................
(Mrs. Kanika)

3. In the accomplishment of this project successfully, many
people have best owned upon me their blessings and the heart
pledged support, this time I am utilizing to thank all the people
who have been concerned with this project.
Primarily I would thank god for being able to make this
project with success. Then I would like to thank my principle
Mr. Kamal and physics teacher Mrs. Kanika, whose valuable
guidence has been the ones that helped me patched this project
and make it full proof success. His suggestions and his
instructions have served as the major contributor towards the
completion of the project.
Then I would like to thanks my parents and friends who
have helped me with their valuable suggestions and guidance
has been very helpful in various phases of the completion of the
project.
Last but not the least I would like to thank my classmates who
helped me a lot.

4. Contentss
What is Photodiode
History & Theory
Features of photodiode
Materials
Types
Photodiode Construction
VI Characteristics of photo diode
Applications
Advantages & Disadvantages
Reference

5. What is Photodiode ?
A Photodiode is a
semiconductor device
that converts lights
into current

6. Photodiode technology developed since 1940s
Photodiode technology was refined in 1950s .
Silicon has been the favoured material fir photodiode,
germanium can also be used, and its use was first
demonstrated in 1962 by Riesz.

7. Excellent linearity with respect to incident light
Low noise
Wide spectral response
Mechanically rugged
Compact and lightweight
Long life

8. Materials commonly used to produce photodiodes
include :

9. PIN Photodiode
PN Photodiode
Avalanche Photodiode

10. CROSS SECTIONS OF THE SILICONE PHOTODIODE

12. Photodiodes are used as photo detectors.
Photodiodes are used in cameras as photo
sensors, Slotted optical switch, in scintillators
Photo diodes are used in consumer
electronics

13. Advantages:
Photodiode detectors are high NIR sensitivity and high
speed.
Low noise
Low dark current
Disadvantages:
Normal PN junction photodiodes have very high
response times.
It has very low sensitivity

15. NCERT class 12 Physics
S.L. Arora reference
Photos from Google images
http://www.google.com/
http://en.wikipedia.org