Lecture 4: Thermoelectric Effects-Physical Approach

By Mark Lundstrom

Electrical and Computer Engineering, Purdue University, West Lafayette, IN

Published on

Abstract

The effect of temperature gradients on current flow and how electrical currents produce heat currents are discussed. Coupled equations for the electric and heat currents are then presented, and applications to electronic cooling and the generation of electrical power from thermal gradients briefly discussed. In this lecture, we use a physical approach and try to keep the mathematics to a minimum.

Outline:

  1. Introduction
  2. Currentflow
  3. Heatflow
  4. Coupled flows
  5. Thermoelectric devices
  6. Discussion
  7. Summary

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Electronics from the Bottom Up” is an educational initiative designed to bring a new perspective to the field of nano device engineering. It is co-sponsored by the Intel Foundation and the Network for Computational Nanotechnology.

Cite this work

Researchers should cite this work as follows:

  • Mark Lundstrom (2011), "Lecture 4: Thermoelectric Effects-Physical Approach," http://nanohub.org/resources/11747.

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Time

Location

Burton Morgan 121, Purdue University, West Lafayette, IN

Tags

Lecture 4: Thermoelectric Effects-Physical Approach
  • NCN Summer School:  July 2011 Near-equilibrium Transport: Fundamentals and Applications  Lecture 4: Thermoelectric Effects:             Physical Approach   1. NCN Summer School: July 2011 … 0
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  • copyright 2011 2. copyright 2011 58.5
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  • about thermoelectricity 3. about thermoelectricity 59.733333333333334
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  • mathematical description 4. mathematical description 98.6
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  • mathematical description 5. mathematical description 185.86666666666667
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  • mathematical description 6. mathematical description 223.3
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  • mathematical description 7. mathematical description 311.06666666666666
    00:00/00:00
  • in this lecture… 8. in this lecture… 455.83333333333331
    00:00/00:00
  • outline 9. outline 465.53333333333336
    00:00/00:00
  • temperature gradients and voltage 10. temperature gradients and volt… 478.83333333333331
    00:00/00:00
  • current is proportional to (f1 – f2) 11. current is proportional to (f1… 582.63333333333333
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  • n-type semiconductor:  equilibrium, V = 0 12. n-type semiconductor: equilib… 662.7
    00:00/00:00
  • n-type semiconductor:  isothermal, V > 0 13. n-type semiconductor: isother… 747.26666666666665
    00:00/00:00
  • Seebeck effect 14. Seebeck effect 828.4666666666667
    00:00/00:00
  • Seebeck effect (ii) 15. Seebeck effect (ii) 866.7
    00:00/00:00
  • Seebeck coefficient 16. Seebeck coefficient 984.5
    00:00/00:00
  • Seebeck coefficient summary 17. Seebeck coefficient summary 1068.7333333333334
    00:00/00:00
  • Seebeck coefficient summary 18. Seebeck coefficient summary 1163.5
    00:00/00:00
  • Seebeck coefficient of Ge 19. Seebeck coefficient of Ge 1276.9
    00:00/00:00
  • outline 20. outline 1320.7333333333334
    00:00/00:00
  • the Peltier effect 21. the Peltier effect 1339.9333333333334
    00:00/00:00
  • understanding the Peltier effect 22. understanding the Peltier effe… 1425.6666666666667
    00:00/00:00
  • N-type semiconductor:  equilibrium, V = 0 23. N-type semiconductor: equilib… 1465.2666666666667
    00:00/00:00
  • N-type semiconductor:  isothermal, V > 0 24. N-type semiconductor: isother… 1485.5333333333333
    00:00/00:00
  • N-type semiconductor:  isothermal, V > 0 25. N-type semiconductor: isother… 1516.2666666666667
    00:00/00:00
  • Peltier coefficient 26. Peltier coefficient 1677.1333333333334
    00:00/00:00
  • a remarkable result 27. a remarkable result 1725
    00:00/00:00
  • outline 28. outline 1785.4333333333334
    00:00/00:00
  • basic equations of thermoelectricity 29. basic equations of thermoelect… 1790.7666666666667
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  • electrical  conductivity 30. electrical conductivity 1877.9666666666667
    00:00/00:00
  • Seebeck coefficient 31. Seebeck coefficient 1906.1333333333334
    00:00/00:00
  • Peltier coefficient 32. Peltier coefficient 1980.4666666666667
    00:00/00:00
  • electronic heat conductivity 33. electronic heat conductivity 2049.7666666666669
    00:00/00:00
  • lattice thermal conductivity 34. lattice thermal conductivity 2184.9
    00:00/00:00
  • Example:  TE transport parameters of n-Ge 35. Example: TE transport paramet… 2217.3666666666668
    00:00/00:00
  • TE transport parameters of n-Ge:  resistivity 36. TE transport parameters of n-G… 2268.7333333333331
    00:00/00:00
  • TE transport parameters of n-Ge:  Seebeck coeff. 37. TE transport parameters of n-G… 2286.8333333333335
    00:00/00:00
  • TE transport parameters of n-Ge:  Peltier coeff. 38. TE transport parameters of n-G… 2329.5333333333333
    00:00/00:00
  • TE transport parameters of n-Ge:  Peltier coeff. 39. TE transport parameters of n-G… 2339.1666666666665
    00:00/00:00
  • TE transport parameters of n-Ge: 40. TE transport parameters of n-G… 2368
    00:00/00:00
  • outline 41. outline 2404.3666666666668
    00:00/00:00
  • thermoelectric cooling 42. thermoelectric cooling 2411.4666666666667
    00:00/00:00
  • thermoelectric power generation 43. thermoelectric power generatio… 2480.2333333333331
    00:00/00:00
  • simplified TE device (one leg) 44. simplified TE device (one leg) 2527.8666666666668
    00:00/00:00
  • simplified TE cooling device (one leg) 45. simplified TE cooling device (… 2567.9
    00:00/00:00
  • simplified TE cooling device (one leg) 46. simplified TE cooling device (… 2609.8
    00:00/00:00
  • cooling efficiency (COP) 47. cooling efficiency (COP) 2758.4666666666667
    00:00/00:00
  • TE power generation 48. TE power generation 2802.4
    00:00/00:00
  • outline 49. outline 2819.4333333333334
    00:00/00:00
  • FOM 50. FOM 2822
    00:00/00:00
  • FOM 51. FOM 2962.6666666666665
    00:00/00:00
  • FOM:  PF vs. Fermi level 52. FOM: PF vs. Fermi level 3043.3333333333335
    00:00/00:00
  • inside view of heat absorbtion/emission 53. inside view of heat absorbtion… 3134.5333333333333
    00:00/00:00
  • measuring S 54. measuring S 3262.3333333333335
    00:00/00:00
  • outline 55. outline 3406.6666666666665
    00:00/00:00
  • summary 56. summary 3408.8666666666668
    00:00/00:00
  • questions 57. questions 3454.7666666666669
    00:00/00:00
  • n-type semiconductor:  isothermal, V > 0 58. n-type semiconductor: isother… 3478.6333333333332
    00:00/00:00
  • TE transport parameters of n-Ge:  Seebeck coeff. 59. TE transport parameters of n-G… 4091.6
    00:00/00:00