共掺杂n型Cu0.008Bi2Te2.6Se0.4多晶合金的电、热、热电输运性质

IF 1.1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Korean Journal of Metals and Materials Pub Date : 2023-03-05 DOI:10.3365/kjmm.2023.61.3.206

Ok Kyu Park, Taewan Kim, M. Heo, S. Park, Se Woong Lee, Hyunmin Cho, Sang‐il Kim

{"title":"共掺杂n型Cu0.008Bi2Te2.6Se0.4多晶合金的电、热、热电输运性质","authors":"Ok Kyu Park, Taewan Kim, M. Heo, S. Park, Se Woong Lee, Hyunmin Cho, Sang‐il Kim","doi":"10.3365/kjmm.2023.61.3.206","DOIUrl":null,"url":null,"abstract":"Bi2Te3-based alloys have been extensively studied as thermoelectric materials near room temperature. In this study, the electrical, thermal, and thermoelectric transport properties of a series of Co-doped n-type Cu0.008Bi2Te2.6Se0.4 polycrystalline alloys (Cu0.008Bi2−xCoxTe2.6Se0.4, x = 0, 0.03, 0.06, 0.09 and 0.12) are investigated. The electrical conductivity of the Cu0.008Bi1.97Co0.03Te2.6Se0.4 (x = 0.03) sample was significantly enhanced, by 34%, to 1199 S/cm compared to 793 S/cm of the pristine Cu0.008Bi2Te2.6Se0.4 (x = 0) sample at 300 K, and gradually decreased to 906 S/cm for x = 0.12 upon further doping. Power factors of the Co-doped samples decreased compared to the 3.26 mW/mK2 of the pristine Cu0.008Bi2Te2.6Se0.4 sample at 300 K. Meanwhile, the power factor of the Cu0.008Bi1.97Co0.03Te2.6Se0.4 (x = 0.03) sample became higher at 520 K. The lattice thermal conductivities of the Co-doped samples decreased due to additional point defect phonon scattering by the Co dopant. Consequently, the zT for the Cu0.008Bi1.97Co0.03Te2.6Se0.4 alloy at 520 K was 0.83, which is approximately 15% larger than that of pristine Cu0.008Bi2Te2.6Se0.4, while the zT of the Cu doped samples at 300 K was smaller than that of the pristine Cu0.008Bi2Te2.6Se0.4 sample. Electrical transport properties of the Co-doped Cu0.008Bi2−xCoxTe2.6Se0.4 samples were analyzed by experimental phenomenological parameters, including the density-of-state, effective mass, weighted mobility, and quality factor.","PeriodicalId":17894,"journal":{"name":"Korean Journal of Metals and Materials","volume":" ","pages":""},"PeriodicalIF":1.1000,"publicationDate":"2023-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Electrical, Thermal, and Thermoelectric Transport Properties of Co-Doped n-type Cu0.008Bi2Te2.6Se0.4 Polycrystalline Alloys\",\"authors\":\"Ok Kyu Park, Taewan Kim, M. Heo, S. Park, Se Woong Lee, Hyunmin Cho, Sang‐il Kim\",\"doi\":\"10.3365/kjmm.2023.61.3.206\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Bi2Te3-based alloys have been extensively studied as thermoelectric materials near room temperature. In this study, the electrical, thermal, and thermoelectric transport properties of a series of Co-doped n-type Cu0.008Bi2Te2.6Se0.4 polycrystalline alloys (Cu0.008Bi2−xCoxTe2.6Se0.4, x = 0, 0.03, 0.06, 0.09 and 0.12) are investigated. The electrical conductivity of the Cu0.008Bi1.97Co0.03Te2.6Se0.4 (x = 0.03) sample was significantly enhanced, by 34%, to 1199 S/cm compared to 793 S/cm of the pristine Cu0.008Bi2Te2.6Se0.4 (x = 0) sample at 300 K, and gradually decreased to 906 S/cm for x = 0.12 upon further doping. Power factors of the Co-doped samples decreased compared to the 3.26 mW/mK2 of the pristine Cu0.008Bi2Te2.6Se0.4 sample at 300 K. Meanwhile, the power factor of the Cu0.008Bi1.97Co0.03Te2.6Se0.4 (x = 0.03) sample became higher at 520 K. The lattice thermal conductivities of the Co-doped samples decreased due to additional point defect phonon scattering by the Co dopant. Consequently, the zT for the Cu0.008Bi1.97Co0.03Te2.6Se0.4 alloy at 520 K was 0.83, which is approximately 15% larger than that of pristine Cu0.008Bi2Te2.6Se0.4, while the zT of the Cu doped samples at 300 K was smaller than that of the pristine Cu0.008Bi2Te2.6Se0.4 sample. Electrical transport properties of the Co-doped Cu0.008Bi2−xCoxTe2.6Se0.4 samples were analyzed by experimental phenomenological parameters, including the density-of-state, effective mass, weighted mobility, and quality factor.\",\"PeriodicalId\":17894,\"journal\":{\"name\":\"Korean Journal of Metals and Materials\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2023-03-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Korean Journal of Metals and Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.3365/kjmm.2023.61.3.206\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Korean Journal of Metals and Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.3365/kjmm.2023.61.3.206","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 1

摘要

Bi2Te3基合金作为接近室温的热电材料已被广泛研究。在本研究中，研究了一系列Co掺杂的n型Cu0.008Bi2Te2.6Se0.4多晶合金（Cu0.008Be2−xCoxTe2.6Se0.4，x=0、0.03、0.06、0.09和0.12）的电学、热学和热电输运特性。在300K下，Cu0.008Bi1.97Co0.03Te2.6Se0.4（x=0.03）样品的电导率与原始Cu0.008Be2Te2.6Se0.4（y=0）样品的793 S/cm相比显著提高了34%，达到1199 S/cm，并且在进一步掺杂后，当x=0.12时，电导率逐渐降低到906 S/cm。与300K时原始Cu0.008Bi2Te2.6Se0.4样品的3.26mW/mK2相比，Co掺杂样品的功率因数降低。同时，Cu0.008Ti1.97Co0.03Te2.6Se0.4（x=0.03）样品的功率因子在520K时变得更高。由于Co掺杂剂的额外点缺陷声子散射，Co掺杂的样品的晶格热导率降低。因此，Cu0.008Bi1.97Co0.03Te2.6Se0.4合金在520 K下的zT为0.83，比原始Cu0.008Be2Te2.6Se0.4的zT大约15%，而Cu掺杂样品在300 K下的zT小于原始Cu0.008 Bi2Te2.6Se0.4样品的zT。通过实验唯象参数，包括态密度、有效质量、加权迁移率和质量因子，分析了Co掺杂Cu0.008Bi2−xCoxTe2.6Se0.4样品的电输运特性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Electrical, Thermal, and Thermoelectric Transport Properties of Co-Doped n-type Cu0.008Bi2Te2.6Se0.4 Polycrystalline Alloys

Bi₂Te₃-based alloys have been extensively studied as thermoelectric materials near room temperature. In this study, the electrical, thermal, and thermoelectric transport properties of a series of Co-doped n-type Cu_0.008Bi₂Te_2.6Se_0.4 polycrystalline alloys (Cu_0.008Bi_2−xCo_xTe_2.6Se_0.4, x = 0, 0.03, 0.06, 0.09 and 0.12) are investigated. The electrical conductivity of the Cu_0.008Bi_1.97Co_0.03Te_2.6Se_0.4 (x = 0.03) sample was significantly enhanced, by 34%, to 1199 S/cm compared to 793 S/cm of the pristine Cu_0.008Bi₂Te_2.6Se_0.4 (x = 0) sample at 300 K, and gradually decreased to 906 S/cm for x = 0.12 upon further doping. Power factors of the Co-doped samples decreased compared to the 3.26 mW/mK² of the pristine Cu_0.008Bi₂Te_2.6Se_0.4 sample at 300 K. Meanwhile, the power factor of the Cu_0.008Bi_1.97Co_0.03Te_2.6Se_0.4 (x = 0.03) sample became higher at 520 K. The lattice thermal conductivities of the Co-doped samples decreased due to additional point defect phonon scattering by the Co dopant. Consequently, the zT for the Cu_0.008Bi_1.97Co_0.03Te_2.6Se_0.4 alloy at 520 K was 0.83, which is approximately 15% larger than that of pristine Cu_0.008Bi₂Te_2.6Se_0.4, while the zT of the Cu doped samples at 300 K was smaller than that of the pristine Cu_0.008Bi₂Te_2.6Se_0.4 sample. Electrical transport properties of the Co-doped Cu_0.008Bi_2−xCo_xTe_2.6Se_0.4 samples were analyzed by experimental phenomenological parameters, including the density-of-state, effective mass, weighted mobility, and quality factor.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Korean Journal of Metals and Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

1.80

自引率

58.30%

发文量

100

审稿时长

4-8 weeks

期刊介绍： The Korean Journal of Metals and Materials is a representative Korean-language journal of the Korean Institute of Metals and Materials (KIM); it publishes domestic and foreign academic papers related to metals and materials, in abroad range of fields from metals and materials to nano-materials, biomaterials, functional materials, energy materials, and new materials, and its official ISO designation is Korean J. Met. Mater.