The Influence of the Size Effects on the Termoelectrical Properties of PbTe Thin Films

Ruvinskiǐ, M. A.; Kostyuk, O. B.; Dzundza, Bogdan

doi:10.21272/jnep.8(2).02051

Cited by 9 publications

(4 citation statements)

References 11 publications

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“…This allows the user to connect the mobile device only while using the application or periodically to transfer data to the server, which significantly saves battery power. As a power source in the case of an earlobe clip, it is convenient to use miniature lithium-ion batteries of the LIR2032 type, it is also possible to use smaller batteries, for example LIR1220, and thin-film thermoelectric converters based on IV-VI compounds to extend the period of operation without recharging [14][15][16][17], which can work due to the temperature difference between the human body and the environment. The pulse wave analysis algorithm consists in processing an array of digitized data, determining the points А0-А3 and Т0-Т4 (Fig.…”

Section: Fig 4 Emission Spectrum Of An Incandescent Lamp (1) a Haloge...mentioning

confidence: 99%

Principles of Construction of Hybrid Microsystems for Biomedical Applications

Dzundza

Kohut

Holota

et al. 2022

Phys. Chem. Solid St.

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The paper analyzes the existing non-invasive methods and tools for measuring and monitoring heart rate (HR), glucose saturation and human blood glucose level (BGL), shows ways of improving them to increase accuracy and expand the number of parameters obtained by these methods, which became the basis for creating a hybrid microsystem device for biomedical applications. A block diagram of the microsystem and a prototype of software and hardware tools for continuous monitoring of heart rate, BGL, saturation level and other blood parameters by photoplethysmography (PPG) have been developed. The proposed algorithms and tools provide primary processing of signals from optical sensors, calculation of pulse wave parameters, data transmission to mobile devices and a remote server, the possibility of calibration during operation based on research results.

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Section: Fig 4 Emission Spectrum Of An Incandescent Lamp (1) a Haloge...mentioning

confidence: 99%

Principles of Construction of Hybrid Microsystems for Biomedical Applications

Dzundza

Kohut

Holota

et al. 2022

Phys. Chem. Solid St.

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“…Thermoelectric materials have been used for many years as a reliable solid-state technology for applications ranging from local cooling to waste heat utilization [1]. The achievements of recent years in the synthesis of semiconductor materials have led to an improvement in the conversion of thermal energy into electrical energy due to the nanostructuring of materials, and have expanded the application boundaries of thermoelectric energy [2,3]. In addition, a time-sTable nanostructured material with high electrical conductivity has been obtained by doping [4].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Features for the design of a specialized information-measuring system for the study of thermoelectric properties of semiconductors

Dunets

Dzundza

Turovska

et al. 2021

EEJET

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Methods for studying thermoelectric parameters of semiconductors that are optimal for the implementation of software and hardware have been analyzed and selected. It is based on the Harman method and its modifications, adapted for pulse measurements, which are convenient to implement on a modern element base. An important advantage of these methods is the absence of the need for accurate measurements of heat fluxes, which greatly simplifies and reduces the time for conducting experimental research. The required operating ranges for the voltage 10 µV–1 V, for the current 10 µA–300 mA and the element base performance at the processing level of 40–200 million samples per second have been determined. Structural and electrical circuits, as well as software for a specialized computer system for studying thermoelectric parameters of both bulk and thin-film thermoelectric materials, and express analysis of the operational characteristics of finished modules have been developed. It has been shown that the proposed scheme copes well with the task. And the use of FPGA and 32-bit microcontrollers provide sufficient processing speed up to 200 MSPS and the necessary synchronization modes for the implementation of the Harman pulse method even when studying films of nanometer thickness. Experimental studies of both bulk thermoelectric modules based on Bi2Te3 and thin-film thermoelectric material based on PbTe have been carried out. The effectiveness of the developed tools and techniques has been shown, which made it possible to more than halve the time for sample preparation and experiment. Based on the presented models, all the main thermoelectric and operational parameters have been determined, in particular, electrical conductivity, Seebeck coefficient, thermal conductivity, thermoelectric figure of merit. As a result of the development of specialized computer tools, it was possible to reduce the labor intensity of the process of measuring the main electrical and operational parameters of semiconductor thermoelectric materials and energy conversion modules based on them, as well as to automate the process of defects identification of thermoelectric modules. The labor intensity of the research process has decreased not only due to the automation of the measurement process, but also due to an optimized technique that allows research on a sample of one configuration, since the manufacture and preparation of samples are the most laborious

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“…This material is widely investigated both in the form of massive samples (single crystals, polycrystalline form, porous material) and in the form of thin films and one-dimensional structures. In addition, the lead telluride has been a model object for the study of physical processes in semiconductors for many years [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Kinetic Phenomena and Thermoelectric Properties of Polycrystalline Thin Films Based on PbSnAgTe Compounds

Ruvinskiǐ¹,

Kostyuk²,

Dzundza³

et al. 2017

J. Nano- Electron. Phys.

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Thin polycrystalline films based on PbSnAgTe (LATT) compounds on mica-muscovite substrates are obtained. The dependences of conductivity, mobility of current carriers and specific thermoelectric power on temperature for these condensates are investigated. It is established that the mechanisms of transport of carriers on the intergrain boundaries dominate at low temperatures, and at higher temperatures the charge transport is determined by the volume of grain. The predominant scattering mechanism at higher temperatures is scattering on acoustic phonons.

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The Influence of the Size Effects on the Termoelectrical Properties of PbTe Thin Films

Cited by 9 publications

References 11 publications

Principles of Construction of Hybrid Microsystems for Biomedical Applications

Principles of Construction of Hybrid Microsystems for Biomedical Applications

Features for the design of a specialized information-measuring system for the study of thermoelectric properties of semiconductors

Kinetic Phenomena and Thermoelectric Properties of Polycrystalline Thin Films Based on PbSnAgTe Compounds

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