SEMICONDUCTOR PHOTONICS LAB., HANYANG UNIV 5.10 Ohmic contacts and thermoelectric coolers Fig 5.43 Ohmic contacts Metal, n-type semiconductor : Metal,

Slides:



Advertisements
Similar presentations
Unit 9 It's warm 清丰县第一实验小学 唐利娟.
Advertisements

Methods of Heat Transfer Definitions Examples Comparison to heat transfer on Earth that effects weather.
Hot Stuff The three forms of heat transfer. Heat Transfer What is Heat Transfer? How many types of heat transfer are there, and what are they?
PH0101 UNIT-5 LECTURE 3 Introduction
Heating and cooling BADI Year 3 John Errington MSc.
Heat Physics 102 Professor Lee Carkner Lecture 3 “If you can’t stand the heat, get out of the kitchen.” -Harry S. Truman.
Heat Transfer  How is heat transferred from one place to another?  What is moving?  In mechanics energy can be transferred through a particle (e.g.
Capacitance Dielectrics 11/12/08. Table 26-1, p.812.
Heat, Part 2.
Figure 1.1 The observer in the truck sees the ball move in a vertical path when thrown upward. (b) The Earth observer views the path of the ball as a parabola.
Thermochemistry The Basics of Heat Transfer. The Flow of Energy Thermochemistry - concerned with heat changes that occur during chemical reactions.
ENDOTHERMIC AND EXOTHERMIC REACTIONS. EXOTHERMIC REACTIONS Chemical Reactions that RELEASE heat with the products. You may see an exothermic reaction.
Jacob McKenzie, Ty Nowotny, Colin Neunuebel
Power Adapters 1 Power Adapters. Power Adapters 2 Introductory Question If you install a pocket radio’s batteries backward, it won’t work because its.
Junctions and Semiconductors Theories and practical devices.
THERMOELECTRICITY. VINCENT ALAN HERAMIZ Introduction & History.
NEEP 541 Ionization in Semiconductors - II Fall 2002 Jake Blanchard.
Solar Cells Solar cells are made of two types of silicon Normal silicon has no free electrons N-type silicon has been doped with phosphorus to give it.
Heat Transfer Chapter 2, Section 2 p How Heat is Transferred Heat: the energy transferred from a hotter object to a cooler one.
Heat Transfer. Heat is the transfer of thermal energy between substances that are at different temperatures.
Time Temperature Cooling Curve liquid freezingsolid.
Conduction, Convection, Radiation, oh my!!. Conduction –Involves objects in direct contact –2 objects in contact are at unequal temperature –Example:
Sea Breeze and Land Breeze. What do we remember about Specific Heat? Substances with a high specific heat warm and cool slowly. They take more energy.
Heat Transfer Chapter 4. Three Types of Heat Transfer Conduction Convection Radiation Heat always travels from areas that are warmer to areas that are.
THERMOELECTRIC COOLING
Heat and Temperature. The difference Heat – the energy that flows from hot to cold. Measured in Joules (J) or calories (cal). Temperature – measure of.
1 Higher Physics Unit 3 Optoelectronics Semiconductors.
UNDERSTANDING HEAT TRANSFER: CONDUCTION, CONVECTION AND RADIATION.
Introduction to Solar Photovoltaic (PV) Systems – Part 2
PRACTICAL # 11 Introduction to light emitting diode (LED), its working principle and terminal identification By:Engr.Irshad Rahim Memon.
Structure and Operation of the MOSFET 9 and 11 March 2015.
Evaporation vs. Condensation, energy flow, Warming vs. Cooling
Types of HEAT Energy Transfers CONDUCTION Objects are in direct contact. Heat energy transfers when particles collide or objects in contact are TOUCHING.
JAVA COOL - DC COOLER 1. √Background The Battery Heat: 2.
Heat Transfer Conduction, Convection, Radiation. Conduction Heat energy can be transferred from one substance to another when they are in direct contact.
How is Energy Transferred?. Radiation animations of heat transfer Emission and transfer of energy by means of electromagnetic waves Method of heat transfer.
Date of download: 6/23/2016 Copyright © ASME. All rights reserved. From: The Compatibility of Thin Films and Nanostructures in Thermoelectric Cooling Systems.
CALCULATING SPECIFIC HEAT CAPACITY Using lab data and your understanding of thermal energy!
Date of download: 6/28/2016 Copyright © ASME. All rights reserved. From: Convective Heat Transfer and Contact Resistances Effects on Performance of Conventional.
Activator Define heat in your own words.. Heat Transfer SPS7. b. Investigate molecular motion as it relates to thermal energy changes in terms of conduction,
WEATHER AND CLIMATE Chapter 1 THE ATMOSPHERE. Section 2 Heating of the Atmosphere.
Green Technologies & Energy Efficiency April 26, 2017
Agenda for 3/3/17 Heat Energy Notes Heat Problems
Thermoelectric Modules (TEM)
Automotive Air Conditioners
Thermo-electric refrigeration.
5.2 Part 2 Heat Transfer.
Development of a Thermoelectric Cooling Prototype
Understanding Heat Transfer, Conduction, Convection and Radiation
Date of download: 12/19/2017 Copyright © ASME. All rights reserved.
Date of download: 12/19/2017 Copyright © ASME. All rights reserved.
Temperature and Heat Transfers
Understanding Heat Transfer, Conduction, Convection and Radiation
Transfer of Energy Atmosphere.
Chapter 6: Thermal Energy
Heat Transfer.
Thermal Energy, Heat, and Temperature
Basics Semiconductors
Thermodynamics.
620 cal/g 80 cal/g 540 cal/g 80 cal/g 540 cal/g 620 cal/g
All matter is made up of molecules and atoms
Chapter 11 Section 4 How does heat move through the atmosphere?
The Particle Model, Temperature and Thermal Energy
Energy and Chemical Changes
10 CHAPTER Refrigeration Cycles.
Heat and temperature Heat, q, is thermal energy transferred (between two systems that are different in temperature) or from a hotter system to a cooler.
7.3 Energy Changes In Reactions
Environmental Science
Heat and Temperature.
Presentation transcript:

SEMICONDUCTOR PHOTONICS LAB., HANYANG UNIV 5.10 Ohmic contacts and thermoelectric coolers Fig 5.43 Ohmic contacts Metal, n-type semiconductor : Metal, p-type semiconductor :

SEMICONDUCTOR PHOTONICS LAB., HANYANG UNIV Fig 5.44 Peltier effect

SEMICONDUCTOR PHOTONICS LAB., HANYANG UNIV Fig 5.45 When a dc current is passed through a semiconductor to which metal contacts have been made, one junction absorbs heat and cools (the cold junction) and the other releases heat and warms (the hot junction)

SEMICONDUCTOR PHOTONICS LAB., HANYANG UNIV Fig 5.46 Cross section of a typical thermoelectric cooler. Temp

SEMICONDUCTOR PHOTONICS LAB., HANYANG UNIV Fig 5.47 Typical structure of a commercial thermoelectric cooler.

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.