Experimental Investigation of Zinc Antimonide Thin Film Thermoelectric Element over Wide Range of Operating Conditions

Mirhosseini, Mojtaba; Rezania, Alireza; Blichfeld, Anders Bank; Iversen, Bo B.; Rosendahl, Lasse

doi:10.1002/pssa.201700301

Cited by 7 publications

(9 citation statements)

References 13 publications

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“…The bipolar effect increases with temperature due to the excitation of electrons from the valence band to the conduction band as the temperature is increased, and create an equal number of holes. These holes and electrons move to the cold side, and transport the heat from the hot side to the cold side of the sample [17]. Although, the net electrical current is zero in this movement due to the equal numbers of opposite charges, the presence of both electrons and holes has a negative effect on the Seebeck coefficient.…”

Section: Resultsmentioning

confidence: 99%

“…Thermally conductive graphite layers were applied to reduce thermal contact resistance between the specimen and the blocks. More details can be observed in the recent published paper by the same authors [17].…”

Section: Experimental Apparatus and Proceduresmentioning

confidence: 99%

“…With a further increase of the temperature, the flexible substrate is metamorphosed and the thermal stress across the substrate and thin film TE material is increased, which causes the contact to become loose or the electrode falls off. Mirhosseini et al [17] experimentally investigated a zinc antimonide thin film thermoelectric uni-leg in a wide range of thermal conditions. The results in steady state condition showed that the Seebeck coefficient increases to a maximum magnitude and then decreases as the hot side temperature increases further.…”

Section: Introductionmentioning

confidence: 99%

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Energy Harvesting from a Thermoelectric Zinc Antimonide Thin Film under Steady and Unsteady Operating Conditions

et al. 2018

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In practice, there are some considerations to study stability, reliability, and output power optimization of a thermoelectric thin film operating dynamically. In this study stability and performance of a zinc antimonide thin film thermoelectric (TE) specimen is evaluated under transient with thermal and electrical load conditions. Thermoelectric behavior of the specimen and captured energy in each part of a thermal cycle are investigated. Glass is used as the substrate of the thin film, where the heat flow is parallel to the length of the thermoelectric element. In this work, the thermoelectric specimen is fixed between a heat sink exposed to the ambient temperature and a heater block. The specimen is tested under various electrical load cycles during a wide range of thermal cycles. The thermal cycles are provided for five different aimed temperatures at the hot junction, from 160 to 350 °C. The results show that the specimen generates approximately 30% of its total electrical energy during the cooling stage and 70% during the heating stage. The thin film generates maximum power of 8.78, 15.73, 27.81, 42.13, and 60.74 kW per unit volume of the thermoelectric material (kW/m3), excluding the substrate, corresponding to hot side temperature of 160, 200, 250, 300, and 350 °C, respectively. Furthermore, the results indicate that the thin film has high reliability after about one thousand thermal and electrical cycles, whereas there is no performance degradation.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental Apparatus and Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Energy Harvesting from a Thermoelectric Zinc Antimonide Thin Film under Steady and Unsteady Operating Conditions

et al. 2018

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“…In Table 1, Matched power output (μW) The results of this study are compared with previous experimental works [10][11][12]. The experimental studies were carried out on a zinc antimonide thin film specimen with the same effective length, width, thermoelectric material and thickness of the substrate.…”

Section: Matched Power Outputmentioning

confidence: 99%

“…Although there are few studies that have investigated performance of thin film thermoelectric modules or elements [10][11][12][13], for modelling of heat loss in TEGs, only bulk thermoelectric modules are considered so far. As discussed in previous studies [14,15], one way to enhance electrical power generation by thin film thermoelectric element is to conduct the heat flow parallel to the length of thin film deposited on an insulating substrate.…”

Section: Introductionmentioning

confidence: 99%

Effect of heat loss on performance of thin film thermoelectric; a mathematical model

Mirhosseini¹,

Rezania²,

Rosendahl³

2019

Mater. Res. Express

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To produce a higher electrical power in thin film thermoelectric legs, one way is to conduct the heat flow inplane parallel to the surface of thin films. One important advantage of using the thermoelectric element in-plane is that, due to high thermal resistance of the thermoelectric leg, there is no need for an efficient heat sink at cold side. A comprehensive mathematical model for analyzing performance of a ZnSb based thermoelectric thin film is proposed based on one dimensional (1D) steady state analysis. Finite element method is employed to solve governing equations, and effects of temperature dependency of thermoelectric material are considered in the model. The modeling study is carried out by a comparison between the ideal case, where there is no heat loss from the thin film, and the case that the heat loss accrues from lateral surfaces of the thin film to the ambient. By taking side surface heat transfer into account for both vertical and horizontal placement of the thin film, two different nonlinear temperature distributions along the thin film length are obtained, and variation of matched power output versus different thermal boundary conditions is shown. The results show that convective heat transfer to the ambient reduces thermoelectric power output, especially at higher temperature difference between the hot and cold sides of the leg. Furthermore, different parameters such as Seebeck coefficient, temperature, generated Seebeck voltage, heat loss, thermoelectric voltage and current at peak power point are evaluated for vertical and horizontal thin film configurations.

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Colloidal Synthesis of P‐Type Zn₃As₂ Nanocrystals

Kim,

Lee,

Gwak

et al. 2024

Advanced Materials

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Zinc pnictides, particularly Zn3As2, hold significant promise for optoelectronic applications owing to their intrinsic p‐type behavior and appropriate bandgaps. However, despite the outstanding properties of colloidal Zn3As2 nanocrystals, research in this area is lacking because of the absence of suitable precursors, occurrence of surface oxidation, and intricacy of the crystal structures. In this study, a novel and facile solution‐based synthetic approach is presented for obtaining highly crystalline p‐type Zn3As2 nanocrystals with accurate stoichiometry. By carefully controlling the feed ratio and reaction temperature, colloidal Zn3As2 nanocrystals are successfully obtained. Moreover, the mechanism underlying the conversion of As precursors in the initial phases of Zn3As2 synthesis is elucidated. Furthermore, these nanocrystals have been employed as active layers in field‐effect transistors that exhibit inherent p‐type characteristics with native surface ligands. To enhance the charge transport properties, a dual passivation strategy is introduced via phase‐transfer ligand exchange, leading to enhanced hole mobilities as high as 0.089 cm2 V–1 s–1. This study not only contributes to the advancement of nanocrystal synthesis, but also opens up new possibilities for previously underexplored p‐type nanocrystal research.This article is protected by copyright. All rights reserved

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Experimental Investigation of Zinc Antimonide Thin Film Thermoelectric Element over Wide Range of Operating Conditions

Abstract: 11Zinc antimonide compound is one of the most efficient thermoelectric (TE) materials known at moderate temperatures 12 up to 350 °C for its exceptional low thermal conductivity. This study aims to evaluate performance of a thin film TE

Cited by 7 publications

References 13 publications

Energy Harvesting from a Thermoelectric Zinc Antimonide Thin Film under Steady and Unsteady Operating Conditions

Energy Harvesting from a Thermoelectric Zinc Antimonide Thin Film under Steady and Unsteady Operating Conditions

Effect of heat loss on performance of thin film thermoelectric; a mathematical model

Colloidal Synthesis of P‐Type Zn₃As₂ Nanocrystals

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Experimental Investigation of Zinc Antimonide Thin Film Thermoelectric Element over Wide Range of Operating Conditions

Abstract: 11Zinc antimonide compound is one of the most efficient thermoelectric (TE) materials known at moderate temperatures 12 up to 350 °C for its exceptional low thermal conductivity. This study aims to evaluate performance of a thin film TE

Cited by 7 publications

References 13 publications

Energy Harvesting from a Thermoelectric Zinc Antimonide Thin Film under Steady and Unsteady Operating Conditions

Energy Harvesting from a Thermoelectric Zinc Antimonide Thin Film under Steady and Unsteady Operating Conditions

Effect of heat loss on performance of thin film thermoelectric; a mathematical model

Colloidal Synthesis of P‐Type Zn3As2 Nanocrystals

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Product

Resources

About

Colloidal Synthesis of P‐Type Zn₃As₂ Nanocrystals