PhotodiodesDept. of Computer Science & EngineeringFaculty of EngineeringUniversity of Development Alternative (UODA)

1

Sharmin Akther LipiID: 011143015

Shemanto Chandraw RoyID: 011143016

Batch: 37 Sem: 05

Participants

2

ContentsWhat is PhotodiodeHistory & TheoryFeatures of photodiodeMaterialsTypesPhotodiode ConstructionVI characteristics of photo diodeApplicationsAdvantages & DisadvantagesReference

What is Photodiode ?

Aphotodiodeis a semiconductor device that converts lightsintocurrent.

Photodiode technology developed since 1940sPhotodiode technology was refined in the 1950sSilicon has been the favoured material for photodiodes, germanium can also be used, and its use was first demonstrated in 1962 by Riesz.

History & Theory

Excellent linearity with respect to incident lightLow noiseWide spectral responseMechanically ruggedCompact and lightweightLong life

Features of photodiode

Materials commonly used to produce photodiodes include:

Materials

Types:

PIN photodiodePN photodiodeAvalanche photodiode

Types

Photodiode Construction

CROSS SECTION OF THE SILICON PHOTODIODE

VI characteristics of photo diode

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

Advantages:Photodiode detector are high NIR sensitivity and high speed.Low noiseLow dark current

Disadvantages:Normal PN junction photo diodes have very high response times.It has very low sensitivity

Advantages & Disadvantages

Referencehttp://en.wikipedia.org/wiki/Photodiodehttp://hyperphysics.phy-astr.gsu.edu/hbase/electronic/photdet.htmlhttp://www.optics.arizona.edu/palmer/OPTI400/SuppDocs/pd_char.pdfhttp://www.radio-electronics.com/info/data/semicond/photo_diode/photo_diode.phphttp://www.wisegeek.com/what-is-a-photodiode.htmlhttp://www.google.com.ph/url?sa=t&rct=j&q=photodiode+threshold+voltage&source=web&cd=7&cad=rja&ved=0CFMQFjAG&url=http%3A%2F%2Fwww.ee.ryerson.ca%2F~courses%2Fee8114%2FPres5-receivers.ppt&ei=Cug6UIIZ4YOZBfrCgYgI&usg=AFQjCNHjrFUHtAoXIV5zAzEIJ_nRdFrf_Qhttp://wiki.answers.com/Q/What_is_the_disadvantage_and_advantage_of_photo_diode_and_transistor

Thank you all &Special thanks to our honorable teacherFarzana Rahman MishuSr. lecturerDept. of Computer Science & EngineeringFaculty of Engineering

Created by Mohammad Ali KhanDept. Computer Science & EngineeringFaculty of EngineeringUniversity of Development Alternative (UODA)