Fabrication of P-N JUNCTION DIODE



BASIC SEMICONDUCTOR
1.1 Semiconductor:-
A semiconductor is a material that has an electrical conductivity between that of a conductor and an insulator. Conductors have very low resistivity (10-2 to 10-8 Ωm) insulator have very high resistivity (>10-2 Ωm), while semiconductors have intermediate values. Semiconductor has resistivity values of order 105 to 100 Ωm.
A semiconductor, such as silicon, has properties ....etc

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POLYMER LIGHT EMITTING DIODES (PLEDs)

Ø Polymer LED (light-emitting diode) - sometimes called light-emitting polymer or polyLED - is a technology based on the use of polymer as the semiconductor material in LEDs.

Ø Polymers are chemical substances that consist of large molecules that are themselves, made from many smaller and simpler molecules.

Ø Polymers are largely identified with insulation.

Research institutes have come up with ideas to integrate polymers into main stream electronics as it has been establis ....etc

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Electrical Characteristics of n-ZnO/p-Si Heterojunction Diodes
4
Grown by Pulsed Laser Deposition at Different Oxygen
5
Pressures
6
7
R.S. AJIMSHA,
1
M.K. JAYARAJ,
1,3
and L.M. KUKREJA
2
8
1.”Optoelectronics Devices Laboratory, Department of Physics, Cochin University of Science and
9
Technology, Kochi 682022, India. 2.”Laser Materials Processing Division, Raja Ramanna Centre
10
for Advanced Technology, Indore 452013, India. 3.”e-mail: [email protected]
11
Heterojunction diodes of n-type ZnO/p-type silicon (1 ....etc

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Definition
The 20th century saw many developments in the field of electronics because of basically two reasons

1. The development of transistors, which forms the basics of everything that is electronics.
2. The development of IC, which helped in the fabrication of fast, compact & sophisticated electronic circuits.

In the 21st century we are going to see some radical changes in the approach towards electronics. These are :
1. The replacement of semiconducting devices with superconducting devices.
2. The use of new classical theories i ....etc

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Definition

Scientific research in the area of semiconducting organic materials as the active substance in light emitting diodes (LEDs) has increased immensely during the last four decades. Organic semiconductors was first reported in the 60:s and then the materials where only considered to be merely a scientific curiosity. (They are named organic because they consist primarily of carbon, hydrogen and oxygen.). However when it was recognized in the eighties that many of them are photoconductive under visible light, industrial interests were a ....etc

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sir i need ppt on organic light emitting diode to present technical paper please send me me the link ....etc

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What Are Diodes Made Out Of?
Silicon (Si) and Germanium (Ge) are the two most common single elements that are used to make Diodes. A compound that is commonly used is Gallium Arsenide (GaAs), especially in the case of LEDs because of it’s large bandgap.
Silicon and Germanium are both group 4 elements, meaning they have 4 valence electrons. Their structure allows them to grow in a shape called the diamond lattice.
Gallium is a group 3 element while Arsenide is a group 5 element. When put together as a compou ....etc

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Abstract.
We examine the utility of Light-Emitting Diodes (LEDs) for short-range intersatellite links (ISLs), and compare and contrast LEDs with existing laser technologies used for long-distance ISLs. A hypothetical low-end LED ISL page link is described, and applications are suggested
Presented By:
Lloyd Wood
Surrey, England
Will Ivancic
NASA Glenn Research Center
Klaus-Peter Dörpelkus
Munich, Germany

1. INTRODUCTION
Current thinking on intersatellite page link communication is that ....etc

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Definition
Scientific research in the area of semiconducting organic materials as the active substance in light emitting diodes (LEDs) has increased immensely during the last four decades. Organic semiconductors was first reported in the 60:s and then the materials where only considered to be merely a scientific curiosity. (They are named organic because they consist primarily of carbon, hydrogen and oxygen.). However when it was recognized in the eighties that many of them are photoconductive under visible light, industrial interests were att ....etc

[:=Read Full Message Here=:]

Electrical Characteristics of n-ZnO/p-Si Heterojunction Diodes
4
Grown by Pulsed Laser Deposition at Different Oxygen
5
Pressures
6
7
R.S. AJIMSHA,
1
M.K. JAYARAJ,
1,3
and L.M. KUKREJA
2
8
1.”Optoelectronics Devices Laboratory, Department of Physics, Cochin University of Science and
9
Technology, Kochi 682022, India. 2.”Laser Materials Processing Division, Raja Ramanna Centre
10
for Advanced Technology, Indore 452013, India. 3.”e-mail: [email protected]
11
Heterojunction diodes of n-type ZnO/p-type silicon (1 ....etc

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