Thermoelectric power factor | Wikipedia audio article
Channel: wikipedia tts
Date: 29/06/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Thermoelectric_materials


00:01:02 1 Materials selection criteria
00:01:29 1.1 Device efficiency
00:06:19 1.2 Power factor
00:07:31 1.3 Aspects of materials choice
00:07:49 1.3.1 State density: metals vs semiconductors
00:08:48 1.3.2 Conductivity
00:10:08 1.3.3 Quality Factor (detailed theory on semiconductors)
00:13:51 2 Materials of interest
00:15:01 2.1 Bismuth chalcogenides and their nanostructures
00:17:25 2.2 Lead telluride
00:18:23 2.3 Inorganic clathrates
00:20:17 2.4 Compounds of Mg and group-IV element
00:21:33 2.5 Skutterudite thermoelectrics
00:22:26 2.6 Oxide thermoelectrics
00:24:05 2.7 Half-Heusler alloys
00:25:33 2.8 Electrically conducting organic materials
00:26:01 2.9 Silicon-germanium
00:27:21 2.10 Sodium cobaltate
00:28:01 2.11 Amorphous materials
00:28:57 2.12 Functionally graded materials
00:29:56 2.13 Nanomaterials and superlattices
00:30:21 2.13.1 PbTe/PbSeTe quantum dot superlattice
00:30:49 2.13.2 Nanocrystal stability and thermal conductivity
00:31:24 2.13.3 Nanocrystalline transition metal silicides
00:32:00 2.13.4 Nanostructured skutterudites
00:32:55 2.13.5 Graphene
00:35:31 2.13.6 Superlattices and roughness
00:37:20 2.13.6.1 Problems in superlattices
00:42:15 2.14 Tin selenide
00:44:54 3 Production methods
00:46:36 4 Applications
00:46:45 4.1 Refrigeration
00:47:42 4.2 Power generation
00:48:57 5 See also



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SUMMARY
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Thermoelectric materials show the thermoelectric effect in a strong or convenient form.
The thermoelectric effect refers to phenomena by which either a temperature difference creates an electric potential or an electric potential creates a temperature difference. These phenomena are known more specifically as the Seebeck effect (converting temperature to current), Peltier effect (converting current to temperature), and Thomson effect (conductor heating/cooling). While all materials have a nonzero thermoelectric effect, in most materials it is too small to be useful. However, low-cost materials that have a sufficiently strong thermoelectric effect (and other required properties) could be used in applications including power generation and refrigeration. A commonly used thermoelectric material in such applications is bismuth telluride (Bi2Te3).
Thermoelectric materials are used in thermoelectric systems for cooling or heating in niche applications, and are being studied as a way to regenerate electricity from waste heat.