Types of Semiconductor
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Topics of the Presentation 1.Semiconductor 2.Intrinsic and Extrinsic semiconductor 3.Difference between Intrinsic and Extrinsic semiconductor 4.Superconductor 5.Application of Superconductor
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semiconductor physics
This document provides an overview of semiconductor physics, PN junction diodes, and resistors. It discusses semiconductor fundamentals including doping, the PN junction, and the diode equation. It explains that semiconductors have a moderate energy gap allowing a few electrons to jump between the valence and conduction bands, leaving holes. Doping with elements of 5 or 3 outer electrons introduces extra electrons or holes, improving conduction. The PN junction forms where P and N materials meet, blocking current in one direction.
Semiconductors
1) Semiconductors have two energy bands called the valence band and conduction band, separated by a forbidden gap.
2) They can be classified as intrinsic or extrinsic. Intrinsic semiconductors are pure, while extrinsic are doped with impurities to alter conductivity.
3) Doping a semiconductor by adding impurities that add free electrons makes it an n-type semiconductor, while adding impurities that add free holes makes it a p-type semiconductor. A p-n junction formed from a p-type and n-type semiconductor can function as a rectifier.
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Semiconductors are substances that can conduct electricity under some conditions but not others. They have resistivity between metals and insulators. There are two types - elemental semiconductors consisting of a single element like silicon or germanium, and compound semiconductors consisting of multiple elements like indium phosphide. In semiconductors, energy levels split into permitted energy bands separated by a forbidden energy gap when atoms are close together. The valence band is filled with electrons and the conduction band above it is empty or partially filled, with a gap between them through which electrons need energy to move.
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PHYSICS OF SEMICONDUCTOR DEVICES
1. When a P-type semiconductor is joined with an N-type semiconductor, a PN junction is formed known as a semiconductor diode.
2. Semiconductor diodes are widely used as rectifiers to convert alternating current (AC) input into direct current (DC) output.
3. In a PN junction, the diffusion of majority carriers across the junction leaves behind charged acceptor and donor ions which form an electric field called the depletion region or space charge region.
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1) Semiconductors have two energy bands called the valence band and conduction band, separated by a forbidden gap.
2) They can be classified as intrinsic or extrinsic. Intrinsic semiconductors are pure, while extrinsic are doped with impurities to alter conductivity.
3) Doping a semiconductor by adding impurities that add free electrons makes it an n-type semiconductor, while adding impurities that add free holes makes it a p-type semiconductor. A p-n junction formed from a p-type and n-type semiconductor can function as a rectifier.
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This document discusses semiconductor materials and their properties. It introduces intrinsic and extrinsic semiconductors. Intrinsic materials like silicon, germanium, and gallium arsenide have characteristic energy band gaps and intrinsic carrier concentrations. Extrinsic materials are formed by doping intrinsic materials with impurities to create excess electrons (n-type) or holes (p-type). The document explores doping processes and how impurities donate or accept electrons to influence a material's conductivity. It also examines bonding structures and carrier mobility in various semiconductors.
PHYSICS OF SEMICONDUCTOR DEVICES
1. When a P-type semiconductor is joined with an N-type semiconductor, a PN junction is formed known as a semiconductor diode.
2. Semiconductor diodes are widely used as rectifiers to convert alternating current (AC) input into direct current (DC) output.
3. In a PN junction, the diffusion of majority carriers across the junction leaves behind charged acceptor and donor ions which form an electric field called the depletion region or space charge region.
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Pn junction diode by sarmad baloch
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I AM SARMAD KHOSA
BSIT (5TH A)
(ISP)
FACEBOOK PAGLE::
https://www.facebook.com/LAUGHINGHLAUGHTER/
YOUTUBE CHANNEL:::
https://www.youtube.com/channel/UCUjaIeS-DHI9xv-ZnBpx2hQ
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This document provides an overview of semiconductors and their history and applications. It discusses how semiconductors have electrical properties between conductors and insulators, depending on their composition and doping. Key developments include the first semiconductor device in 1874, the application of quantum mechanics to semiconductors in 1927, and the invention of the transistor in 1947 and integrated circuit in 1959, which led to the development of modern computers. Common semiconductor components like diodes, transistors, and rectifiers are also summarized.
Electronic device
The document provides an overview of topics in electronic devices that will be covered by B.K. Nal in his book, including semiconductors, diodes, LEDs, photodiodes, solar cells, Zener diodes, transistors, logic gates, and transistors as switches. It first defines semiconductors as materials with electrical properties between conductors and insulators, such as silicon and germanium. It then discusses the basic electronic materials of conductors, insulators, and semiconductors.
Intrinsic & Extrinsic , N-type & P-type and Forward& Reverse Biased
This document discusses intrinsic and extrinsic semiconductors, n-type and p-type semiconductors, and forward and reverse biasing. It defines intrinsic semiconductors as having equal numbers of electrons and holes, while extrinsic semiconductors have unequal numbers due to impurities. N-type semiconductors have extra electrons from donors, while p-type have holes from acceptors. Forward biasing reduces the depletion region barrier, allowing more current, while reverse biasing strengthens the barrier and blocks most current. Special semiconductor devices like LEDs, photodiodes, and solar cells are also summarized.
SSD.pptx
This document provides an overview of solid-state devices and semiconductor components. It discusses intrinsic and doped semiconductors, n-type and p-type materials, and how p-n junctions are formed. Common solid-state devices are then described, including diodes, transistors, and capacitors. Diodes allow current to flow in one direction, while transistors can amplify signals. Capacitors store electrical energy in an electric field. The document explains key concepts such as forward and reverse biasing of diodes. In summary, it introduces fundamental building blocks of electronics like semiconductors and reviews important passive and active solid-state components.
Advancements of Semi conductors and Superconductors
explained what are semiconductors and superconductors and their uses. Also nowadays revolutions and advancements in semiconductors as superconductors. After reading these Slides one can easily understand about semiconductors and Superconductors, Nowadays our life is full of semiconductor usage.
Physics of LEDs
This document describes the physics of light-emitting diodes (LEDs). It explains that LEDs are semiconductors made of doped n-type and p-type materials that emit light when electrically biased. When voltage is applied in the forward direction, electrons flow across the junction between the materials, recombining with holes and releasing photons. This causes the LED to emit light. Common uses of LEDs include traffic lights, electronics, and displays due to their energy efficiency and long lifetimes compared to incandescent bulbs. The document provides circuit symbols for LEDs and diagrams showing their connection in forward bias to illuminate.
Semiconductor devices
Abel Presley Gomes presented on semiconductor devices. The presentation introduced semiconductors and their properties, the two types of semiconductors - intrinsic and extrinsic. It described key semiconductor components like diodes, transistors and how they work. Transistors were invented in 1948 and consist of two back-to-back p-n junctions with an emitter, base and collector. The presentation highlighted advantages of semiconductors like their use in microcircuits, strength, longevity and switching abilities.
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3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
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一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
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Types of Semiconductor
- 1. Types of semiconductor Presented by:- Harsh(19l7-19BST110) B.Voc(Solar Technology) 6th Sem
- 2. Content ❖Semiconductor ❖Intrinsic and Extrinsic semiconductor ❖Difference between Intrinsic and Extrinsic semiconductor ❖Superconductor ❖Application of Superconductor
- 3. Semiconductor ⮚ Semiconductors are the materials which have a conductivity between conductors (generally metals) and non- conductors or insulators(such as ceramics). Semiconductors can be compounds such as gallium arsenide or pure elements, such as germanium or silicon. ⮚ There are 2 Types of Semiconductor ✔ Intrinsic Semiconductor ✔ Extrinsic Semiconductor
- 4. Intrinsic Semiconductor ⮚ Intrinsic Semiconductor:- An intrinsic (pure) semiconductor, also called an undoped semiconductor or I- type semiconductor, is a pure semiconductor without any significant dopant species present. The number of charge carriers is therefore determined by the properties of the material itself instead of the amount of impurities. ⮚ Extrinsic Semiconductor:- Extrinsic semiconductors are semiconductors that are doped with specific impurities. The impurity modifies the electrical properties of the semiconductor and makes it more suitable for electronic devices such as diodes and transistors.
- 5. Difference between Intrinsic and Extrinsic semiconductor Source :- https://electronicsdesk.com/wp-content/uploads/2019/02/crystal-lattice-of-n-type-extrinsic-semiconductor.jpg Crystallisation Structure of Intrinsic Semiconductor Crystallisation Structure of n-Type Extrinsic Semiconductor
- 6. Difference between Intrinsic and Extrinsic semiconductor Intrinsic Semiconductor ⮚ Semiconductor in Pure form is known as Intrinsic Semiconductor. ⮚ Due to its pure form, intrinsic semiconductors possess low conductivity. ⮚ Examples:- Pure Silicone, Pure Germanium. ⮚ At Room Temperature No. of Electron=No. of Holes Extrinsic Semiconductor ⮚ Semiconductor, Which isn’t in Their Pure form or Impure form is known as Extrinsic Semiconductor. ⮚ extrinsic semiconductors exhibit comparatively better conductivity than intrinsic semiconductor. ⮚ Examples:- n-Type Semiconductor and p-Type Semiconductor. ⮚ In n-Type, No. of Electron>No. of Holes In p-Type, No. of electron<No. of Holes
- 7. Superconductor A material that shows zero electrical resistance and magnetic field to penetrate through is known as a superconductor, which is because of its superconductivity. So, superconductors can conduct electricity without any loss. Usually, a material will achieve its superconductivity at a very cold temperature. Superconductor and superconducting materials are metals, ceramics, organic materials, or heavily doped semiconductors that conduct electricity without resistance. Superconducting materials can transport electrons with no resistance, and hence release no heat, sound, or other energy forms. Source :- https://www.bing.com/th?id=OIP.jyec52dmLFfKc69FA75IDwAAAA&w=200&h=152&rs=1&qlt=80&o=6&pid=3.1
- 8. Application of Superconductor ⮚ Superconductors are widely used in magnetic resonance imaging(MRI) and nuclear magnetic resonance imaging(NMRI). ⮚ They are also used as the high energy particle accelerator in laboratories and also in nuclear fusion reactors. ⮚ Superconductors are also used in fast digital circuits, Cell phone base Stations, power railguns and coilguns and also in particle detectors. ⮚ Superconducting electromagnets are widely used in maglev trains.
- 9. Thanking you