Optimization of Peltier thermocouple using distributed Peltier effect

Belov, Igor; Волков, В. П.; Manyakin, O.

doi:10.1109/ict.1999.843392

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…Functionally graded materials (FGMs) are engineered materials where properties are varied spatially either continuously or a step-by-step (segmented) fashion throughout the volume of the material. − Spatial control through composition, microstructure, and orientation can tune local properties across the FGM . Implementation of the functional grading principles offers an opportunity of increasing the efficiency of thermoelectric devices for power generation or cooling by employing appropriate distribution of n and microstructure. − The effectiveness of FGMs has been exclusively investigated with inorganic thermoelectric materials (e.g., Bi 2 Te 3 and PbTe). ,, For perspective, a wide operating temperature range (up to ca. 1000 K) for power generation through inorganic materials leads to thermoelectric properties to be a strong function of temperature .…”

Section: Introductionmentioning

confidence: 99%

Leveraging Sequential Doping of Semiconducting Polymers to Enable Functionally Graded Materials for Organic Thermoelectrics

Dong

Grocke

et al. 2020

Macromolecules

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With the ability to modulate electronic properties through molecular doping coupled with ease in processability, semiconducting polymers are at the forefront in enabling organic thermoelectric devices for thermal energy management. In contrast to uniform thermoelectric material properties, an alternative route focuses on functionally graded materials (FGMs) where one spatially controls and optimizes transport properties across the length of a thermoelectric material. While primarily studied in the context of inorganic materials, the concept of FGMs for organic thermoelectrics has not been explored. Herein, we introduce how molecular doping of semiconducting polymers enables spatial compositional control of thin-film FGMs. Specifically, we use sequential vapor doping of poly[2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene] (PBTTT) with the small molecule acceptor 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) to fabricate the simplest form of FGMsdouble-segmented thin films. The two thin-film segments are of equal length (7.5 mm) but each set to different doping levels. Our study focuses on understanding the thermoelectric properties (Seebeck coefficient, α, and electronic conductivity, σ) and structural properties (through X-ray scattering, UV–vis–NIR spectroscopy, and Raman spectroscopy) within and across the two segments. We observe the presence of a small diffuse interfacial region of 0.5–1 mm between the two segments where the doping level and transport properties vary continuously. Despite the diffuse interface, the measured α across the two segments is simply the average of α within each segment. Importantly, this experimental result is consistent with reported mathematical models describing the spatial average of α in graded thermoelectric materials. Our results demonstrate the facile fabrication and characterization of functionally graded organic thermoelectric materials, providing guidelines for further development on more complex FGMs.

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Section: Introductionmentioning

confidence: 99%

Leveraging Sequential Doping of Semiconducting Polymers to Enable Functionally Graded Materials for Organic Thermoelectrics

Dong

Grocke

et al. 2020

Macromolecules

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“…For example, due to the position-dependent Seebeck coefficient, Peltier heat can be considered to be absorbed or released inside the active material. It is then referred to as the distributed Peltier effect or the extrinsic Thomson effect [125][126][127].…”

Section: The Peltier-thomson Termmentioning

confidence: 99%

Thermodynamics of Thermoelectric Phenomena and Applications

Goupil

Seifert

Zabrocki

et al. 2011

Entropy

268

252

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Abstract:Fifty years ago, the optimization of thermoelectric devices was analyzed by considering the relation between optimal performances and local entropy production. Entropy is produced by the irreversible processes in thermoelectric devices. If these processes could be eliminated, entropy production would be reduced to zero, and the limiting Carnot efficiency or coefficient of performance would be obtained. In the present review, we start with some fundamental thermodynamic considerations relevant for thermoelectrics. Based on a historical overview, we reconsider the interrelation between optimal performances and local entropy production by using the compatibility approach together with the thermodynamic arguments. Using the relative current density and the thermoelectric potential, we show that minimum entropy production can be obtained when the thermoelectric potential is a specific, optimal value.

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First Principles Calculations of Electron Transport Properties in Disordered Thermoelectrics

Toboła

Chaput

2017

Materials, Preparation, and Characterization in Thermoelectrics

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Optimization of Peltier thermocouple using distributed Peltier effect

Cited by 3 publications

References 1 publication

Leveraging Sequential Doping of Semiconducting Polymers to Enable Functionally Graded Materials for Organic Thermoelectrics

Leveraging Sequential Doping of Semiconducting Polymers to Enable Functionally Graded Materials for Organic Thermoelectrics

Thermodynamics of Thermoelectric Phenomena and Applications

First Principles Calculations of Electron Transport Properties in Disordered Thermoelectrics

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