Thermoelectric materials | Wikipedia audio article
Channel: wikipedia tts
Date: 14/01/2019

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Thermoelectric_materials


00:01:20 1 Materials selection criteria
00:01:53 1.1 Device efficiency
00:08:07 1.2 Power factor
00:09:31 1.3 Aspects of materials choice
00:09:53 1.3.1 State density: metals vs semiconductors
00:11:09 1.3.2 Conductivity
00:12:55 1.3.3 Quality Factor (detailed theory on semiconductors)
00:17:43 2 Materials of interest
00:19:13 2.1 Bismuth chalcogenides and their nanostructures
00:22:17 2.2 Lead telluride
00:23:34 2.3 Inorganic clathrates
00:26:02 2.4 Magnesium group IV compounds
00:27:22 2.5 Silicides
00:27:57 2.6 Skutterudite thermoelectrics
00:29:42 2.7 Oxide thermoelectrics
00:31:48 2.8 Half Heusler alloys
00:33:49 2.9 Electrically conducting organic materials
00:35:02 2.10 Silicon-germanium
00:35:45 2.11 Sodium cobaltate
00:36:36 2.12 Amorphous materials
00:37:49 2.13 Functionally graded materials
00:39:06 2.14 Nanomaterials and superlattices
00:39:36 2.14.1 PbTe/PbSeTe quantum dot superlattice
00:40:11 2.14.2 Nanocrystal stability and thermal conductivity
00:41:06 2.14.3 Nanocrystalline transition metal silicides
00:41:51 2.14.4 Nanostructured skutterudites
00:43:01 2.14.5 Graphene
00:46:28 2.14.6 Superlattices and roughness
00:48:48 2.14.6.1 Problems in superlattices
00:55:08 2.15 Tin selenide
00:58:34 3 Production methods
01:00:45 4 Applicationssup&#91;78&#93;/sup
01:00:56 4.1 Refrigeration
01:02:10 4.2 Power generation
01:03:45 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.