Approach to Determine the Density-of-States Effective Mass with Carrier Concentration-Dependent Seebeck Coefficient

Kyu Hyoung Lee; Sang-il Kim; Jong-Chan LimJung Young ChoHeesun YangHyun-Sik Kim

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Approach to Determine the Density-of-States Effective Mass with Carrier Concentration-Dependent Seebeck Coefficient

机译：Approach to Determine the Density-of-States Effective Mass with Carrier Concentration-Dependent Seebeck Coefficient

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摘要

Band engineering is an effective strategy to improve the electronic transport propertiesof semiconductors. In thermoelectric materials research, density-of-stateseffective mass is an undoubted key factor in verifying the band engineering effectand establishing a strategy for enhancing thermoelectric performance. However,estimation of the effective mass is demanding or inaccurate depending on themethods taken. A simple equation is proposed, valid for all degeneracy: Log10(m_d*T/300) = (2/3) Log10 (n) ? (2/3) 20.3 ? (0.00508 × ~（S）) + (1.58 × 0.967S) thatutilizes experimentally determined Seebeck coefficient (S) and carrier concentration(n) to determine the effective mass (m_d*) at a temperature (T). Thisstraightforward equation, which gives an accurate analysis of the band modulationin terms of md*, is indispensable in designing thermoelectric materialsof maximized performance.

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来源
《Advanced functional materials》 |2022年第33期|2203852.1-2203852.7|共7页
作者
Kyu Hyoung Lee; Sang-il Kim; Jong-Chan LimJung Young ChoHeesun YangHyun-Sik Kim;
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作者单位

Department of Materials Science and EngineeringYonsei University50 Yonsei-ro, Seodaemun-gu, Seoul 03722, South Korea;

Department of Materials Science and EngineeringUniversity of Seoul163 Seoulsiripdae-ro, Dongdaemun-gu, Seoul 02504, South Korea;

Department of Materials Science and EngineeringHongik University94 Wausan-ro, Mapo-gu, Seoul 04066, South KoreaEnergy and Environmental Materials DivisionKorea Institute of Ceramic Engineering and Technology101 Soho-ro, Gyeongsangnam-do, Jinju 52851, South Korea;

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正文语种英语
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carrier concentrations; density-of-states effective mass; Pisarenko plot; Seebeck coefficient; thermoelectric;

Approach to Determine the Density-of-States Effective Mass with Carrier Concentration-Dependent Seebeck Coefficient

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