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Korean J. Met. Mater.
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Korean Journal of Metals and Materials
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정밀한 Pb 도핑을 통한 Bi
0.5
Sb
1.5
Te
3
의 열전 성능 향상: Single Parabolic Band 모델을 이용한 분석
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강지원, 황성미, 김세윤, 이창우, 서원선, 김상일, 김현식
Korean J. Met. Mater.
2024;62(10):787-795. Published online 2024 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2024.62.10.787
Abstract
This study investigates the thermoelectric properties of Pb-doped p-type Bi
0.5
Sb
1.5
Te
3
alloys using the Single Parabolic Band (SPB) model, focusing on optimizing room-temperature performance. We systematically analyze the effects of Pb doping (0, 0.49, 0.65, 0.81, 0.97, and 1.3 at%) on key parameters including density-of-states effective mass (
m
d
*), non-degenerate mobility.....
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Cu 도핑 및 Electric Current Pulse 공정에 의한 Bi-Sb-Te계 열전소재의 최대 열전성능지수 예측
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이준하, 박현진, 김준수, 서원선, 김상일, 김현식
Korean J. Met. Mater.
2024;62(7):550-557. Published online 2024 Jun 28
DOI:
https://doi.org/10.3365/KJMM.2024.62.7.550
Abstract
Bi
2
Te
3
shows high thermoelectric performance near room temperature, making it the most widely used material in thermoelectric cooling applications. Cu doping has been found to be effective in improving the thermoelectric performance of Bi
2
Te
3
. However, due to the problem of easy migration of Cu ions, the stability of Cu-doped Bi
2
Te
3
.....
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시작물질 농도 제어에 따른 Cu
3
SbSe
4
열전소재의 최대 열전성능지수 예측
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이민규, 황성미, 김세준, 서원선, 김상일, 김현식
Korean J. Met. Mater.
2024;62(6):487-493. Published online 2024 May 31
DOI:
https://doi.org/10.3365/KJMM.2024.62.6.487
Abstract
Cu
3
SbSe
4
is considered a promising thermoelectric material because of its large effective mass and low thermal conductivity, originating from its unique lattice structure. However, Cu
3
SbSe
4
has intrinsically low carrier concentration and relatively high electric resistance which limit performance. Recently, a
zT
improvement in Cu
3
SbSe
4
was reported where doping/precipitation is controlled.....
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Bi 도핑에 따른 SnTe의 상온 최대 열전성능지수 예측
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이준하, 박현진, 김정연, 서원선, 양희선, Umut Aydemir, 김세윤, 신원호, 김현식
Korean J. Met. Mater.
2023;61(12):915-922. Published online 2023 Nov 30
DOI:
https://doi.org/10.3365/KJMM.2023.61.12.915
Abstract
SnTe has drawn much attention due to its Pb-free composition along with tunable electronic and lattice structures. However, its intrinsically high defect concentration and high lattice thermal conductivity (
κ
1
) have hindered its application in devices. Recently, Bi doping at Sn-sites in Sn
1-
x
Bi
x
Te (
x
= 0.0 – 0.08) has been demonstrated.....
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Web of Science 1
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SnSe
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결함 도입으로 인한 SnSe의 고온 열전성능 증대 메커니즘
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김준수, 황성미, 박현진, Yinglu Tang, 서원선, 류채우, 양희선, 신원호, 김현식
Korean J. Met. Mater.
2023;61(11):857-866. Published online 2023 Oct 29
DOI:
https://doi.org/10.3365/KJMM.2023.61.11.857
Abstract
SnSe is a promising thermoelectric material due to its low toxicity, low thermal conductivity, and multiple valence band structures, which are ideal for high electronic transport properties. The multiple valence band structure has attracted many attempts to engineer the carrier concentration of the SnSe via doping, to place its fermi.....
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Web of Science 1
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Debye-Callaway 모델 기반 Yb(Cd
1-
x
Mg
x
)
2
Sb
2
열전 합금의 격자 열전도도 분석
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허민수, 권승환, 서원선, 김상일, 김현식
Korean J. Met. Mater.
2023;61(8):608-615. Published online 2023 Jul 24
DOI:
https://doi.org/10.3365/KJMM.2023.61.8.608
Abstract
YbCd
2
Sb
2
-based Zintl phases have been identified as promising materials for thermoelectric applications due to their high Seebeck coefficient and electrical conductivity. However, their high thermal conductivity limits their overall thermoelectric performance. To address this, Mg has recently been introduced as an alloying element at Cd atomic sites to reduce the.....
More
Web of Science 2
Crossref 2
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YbCd
2-x
Mg
x
Sb
2
열전 합금의 열전 성능 증대 메커니즘 분석
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권승환, 김상일, 허민수, 서원선, 노종욱, 양희선, 김현식
Korean J. Met. Mater.
2023;61(3):198-205. Published online 2023 Feb 24
DOI:
https://doi.org/10.3365/KJMM.2023.61.3.198
Abstract
YbCd
2
Sb
2
is a promising Zintl compound for waste heat recovery applications due to its low thermal conductivity, originating from its complex crystal structure. Many strategies such as alloying or doping have been suggested to further reduce the thermal conductivity of YbCd
2
Sb
2
to improve its thermoelectric performance. However, the.....
More
Web of Science 1
Crossref 1
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Two-Band 모델을 이용한 작은 밴드 갭을 가진 Fe(Se
1-x
Te
x
)
2
열전합금의 전기적 수송 특성 분석
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황성미, 김상일, 허민수, 이기영, 양희선, 서원선, 김현식
Korean J. Met. Mater.
2023;61(2):98-106. Published online 2023 Jan 27
DOI:
https://doi.org/10.3365/KJMM.2023.61.2.98
Abstract
Environmentally sustainable thermoelectric technologies can be more broadly applied in industries once the performance of thermoelectric materials is improved. Several approaches have been proposed to improve the electronic transport properties of thermoelectric materials. The effects of each approach on the electronic properties can be evaluated by changes in the band.....
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