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Korean J. Met. Mater.
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C
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M
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Two-Band 모델을 이용한 작은 밴드 갭을 가진 Fe(Se
1-x
Te
x
)
2
열전합금의 전기적 수송 특성 분석
S
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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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대기중 안정한 MAPbI
3
에서의 Photo Seebeck 효과
Y
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K
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,
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김유성, 박병남
Korean J. Met. Mater.
2023;61(2):91-97. Published online 2023 Jan 27
DOI:
https://doi.org/10.3365/KJMM.2023.61.2.91
Abstract
With increasing interest in energy harvesting using heat as a next-generation eco-friendly energy source, organic-inorganic perovskite materials have emerged as promising materials for thermoelectric devices. In particular, the photo-Seebeck effect of halide perovskite materials has attracted attention due to their wide optical absorption spectrum and large diffusion length, depending on.....
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Korean J. Met. Mater.
2023;61(1):46-53. Published online 2022 Dec 28
DOI:
https://doi.org/10.3365/KJMM.2023.61.1.46
Abstract
In this study, Cu
3
Sb
1-y
Sn
y
Se
4
(0 ≤ y ≤ 0.08) permingeatites were synthesized via mechanical alloying followed by hot pressing. The phase transformation, microstructure, charge transport parameters of the permingeatites, and their thermoelectric properties were analyzed. The permingeatites were present in a single phase with a tetragonal structure, and secondary phases.....
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Korean J. Met. Mater.
2022;60(12):926-932. Published online 2022 Nov 25
DOI:
https://doi.org/10.3365/KJMM.2022.60.12.926
Abstract
We investigated the effect of Ni doping on the electrical, thermal, and thermoelectric transport properties of FeSe
2
polycrystalline alloys. FeSe
2
alloys exhibit both n-type and p-type conduction at different temperatures and thus their practicality as a thermoelectric material is somewhat limited. In this study, Fe
1-x
Ni
x
Se
2
polycrystalline samples with
x
=.....
More
Cited By 1
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Korean J. Met. Mater.
2022;60(12):919-925. Published online 2022 Nov 25
DOI:
https://doi.org/10.3365/KJMM.2022.60.12.919
Abstract
Re
2
Te
5
is considered a potential thermoelectric material because of its intrinsically low thermal conductivity, due to its complex crystal structure. Herein, a series of Se-doped Re
2
Te
5
(Re
2
Te
5-x
Se
x
,
x
= 0, 0.2, 1, and 2) samples were synthesized, and their electrical and thermal transport properties were investigated. Pure orthorhombic Re
2
Te
5
phases.....
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Cited By 1
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Korean J. Met. Mater.
2022;60(12):912-918. Published online 2022 Nov 25
DOI:
https://doi.org/10.3365/KJMM.2022.60.12.912
Abstract
Bi
2
O
2
Se oxyselenide has been actively studied as a potential
n
-type thermoelectric material because of its intrinsically low thermal conductivity and high Seebeck coefficient (S). However, Bi
2
O
2
Se has very low electrical conductivity (σ), resulting in relatively poor thermoelectric performance. Herein, we investigate the effect of Cu addition on the electrical and.....
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-
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K
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B
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-
K
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Korean J. Met. Mater.
2022;60(11):858-864. Published online 2022 Oct 31
DOI:
https://doi.org/10.3365/KJMM.2022.60.11.858
Abstract
NbFeSb-based alloys are promising
p
-type half-Heusler materials with excellent thermoelectric performance, thermal stability, and naturally abundant constituent elements. Alloying and doping are powerful techniques for enhancing the thermoelectric properties of half-Heusler materials. This study experimentally investigated the effects of V alloying in NbFeSb codoped with Ti, Zr, and Sn. As.....
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B
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A
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H
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K
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Korean J. Met. Mater.
2022;60(8):593-600. Published online 2022 Jul 12
DOI:
https://doi.org/10.3365/KJMM.2022.60.8.593
Abstract
In this study, mechanical alloying was performed to synthesize permingeatite Cu
3
Sb
1-x-y
Sn
x
Bi
y
Se
4
(0.02 ≤ x ≤ 0.06 and 0.02 ≤ y ≤ 0.04) doped with Sn and Bi. Hot pressing was subsequently conducted to achieve dense sintered bodies. When the Bi content was constant, the carrier concentration increased with the Sn.....
More
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(
0
x
1
)
c
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p
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n
d
s
Pb(Bi1
-x
Sn
x
)
2
Te
4
(0≤x≤1) 화합물의 열전수송특성 연구
W
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L
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남우현, 임영수
Korean J. Met. Mater.
2022;60(8):587-592. Published online 2022 Jul 12
DOI:
https://doi.org/10.3365/KJMM.2022.60.8.587
Abstract
In this study, the effect of Sb incorporation on the thermoelectric transport properties of tetradymite-type Pb(Bi
2-x
Sb
x
)Te
4
(0≤x≤1) compounds is presented. PbBi
2
Te
4
(x = 0) possesses a high electron concentration of ~1.6×10
20
/cm
3
at room temperature and exhibits n-type degenerate semiconductor behavior, in which electrical conductivity decreases and negative Seebeck coefficient increases.....
More
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산화물 환원공정에 의한 n형 Bi
2
Te
2.7
Se
0.3
화합물의 합성과 열전특성
Y
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g
S
o
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L
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,
B
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임영수, 박배건, 이길근
Korean J. Met. Mater.
2022;60(6):463-470. Published online 2022 May 24
DOI:
https://doi.org/10.3365/KJMM.2022.60.6.463
Abstract
We present a study on the synthesis of Bi
2
Te
2.7
Se
0.3
powders through an oxide reduction process and also on the effect of the oxide reduction process on the thermoelectric transport properties of the resulting Bi
2
Te
2.7
Se
0.3
compounds. Starting materials of Bi
2
O
3
, TeO
2
and SeO
2
were mechanical milled for homogeneous mixing, and then.....
More
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>
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>
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<
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u
b
>
:
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-
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L
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,
I
l
-
H
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K
i
m
Korean J. Met. Mater.
2022;60(6):455-462. Published online 2022 May 24
DOI:
https://doi.org/10.3365/KJMM.2022.60.6.455
Abstract
Skinnerite Cu
3
SbS
3
, which consists of non-toxic and low-cost elements, is a potential thermoelectric material, however, studies on its thermoelectric properties are limited. In this study, the optimal conditions of mechanical alloying (MA) and hot pressing (HP) for the synthesis of the Cu
3
SbS
3
phase were investigated, and its thermoelectric properties were.....
More
Cited By 1
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4
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<
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<
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1
3
<
/
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b
>
M
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n
-
C
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K
w
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n
,
I
l
-
H
o
K
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m
Korean J. Met. Mater.
2022;60(6):440-447. Published online 2022 May 24
DOI:
https://doi.org/10.3365/KJMM.2022.60.6.440
Abstract
Si-doped Cu
12
Sb
4-y
Si
y
S
13
(y = 0.1-0.4) compounds were prepared using solid-state synthesis. Each specimen consisted of a single tetrahedrite phase with a densely sintered body whose relative density exceeded 98.9%. The lattice constant decreased from 1.0357 nm to 1.0336 nm as the Si content increased. When the Si doping content (y).....
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-
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Korean J. Met. Mater.
2022;60(5):384-390. Published online 2022 Apr 22
DOI:
https://doi.org/10.3365/KJMM.2022.60.5.384
Abstract
Cu-based ternary chalcogenides composed of earth-abundant and nontoxic elements are considered promising thermoelectric materials, although there are few reports on them. In our previous studies, optimal mechanical alloying (MA) and hot pressing (HP) were used to synthesize Cu
3
SbS
4
(famatinite) and Cu
3
SbSe
4
(permingeatite). In this study, solid solutions of Cu
3
SbS
4-y
Se
y
(y.....
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Korean J. Met. Mater.
2022;60(5):376-383. Published online 2022 Apr 22
DOI:
https://doi.org/10.3365/KJMM.2022.60.5.376
Abstract
Ge-doped tetrahedrites Cu
12
Sb
4-y
Ge
y
S
13
(
y
= 0.1–0.4) were prepared using mechanical alloying and hot pressing. An X-ray diffraction analysis after mechanical alloying showed a single tetrahedrite phase without secondary phases. The tetrahedrite phase was stable after hot pressing at 723 K under 70 MPa. As the Ge content increased, the lattice.....
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FeSe
2
-FeTe
2
계 다결정 소재의 상 형성 거동 및 전기 전도 특성에 관한 연구
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박옥민, 김태완, 이세웅, 김현식, 신원호, , 김상일
Korean J. Met. Mater.
2022;60(4):315-320. Published online 2022 Mar 28
DOI:
https://doi.org/10.3365/KJMM.2022.60.4.315
Abstract
In this study, we investigated the phase formation behavior of the FeSe
2
-FeTe
2
system and the evolution of their thermoelectric transport properties. A series of Fe(Se
1-x
Te
x
)
2
(
x
= 0, 0.2, 0.6, 0.8 and 1) compounds were synthesized by conventional solid-state reaction. Single phase orthorhombic structures were formed, except for FeSe
0.4
Te
1.6
(
x
= 0.2)......
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Cited By 2
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Ta 도핑된 Zr
0.6-x
Ti
0.4
Ta
x
NiSn n형 하프-호이슬러 소재의 열전특성
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주성재, 손지희, 장정인, 민복기, 김봉서
Korean J. Met. Mater.
2022;60(3):213-219. Published online 2022 Feb 8
DOI:
https://doi.org/10.3365/KJMM.2022.60.3.213
Abstract
Half-Heusler (HH) thermoelectric materials are promising for mid- to high-temperature applications, and
M
NiSn (
M
= Ti, Zr, Hf) is a representative n-type HH alloy. In general, the
M
sites are mixed with isoelectronic elements Ti, Zr, and Hf, to lower the lattice thermal conductivity, and the Sn sites are doped.....
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Korean J. Met. Mater.
2021;59(12):904-910. Published online 2021 Nov 19
DOI:
https://doi.org/10.3365/KJMM.2021.59.12.904
Abstract
In this study, half-Heusler (HH) thermoelectric materials Nb
0.8
Hf
0.2
FeSb
0.98
Sn
0.02
(p-type) and Hf
0.25
Zr
0.25
Ti
0.5
NiSn
0.98
Sb
0.02
(n-type) were synthesized using induction melting and spark plasma sintering. For alloying, a conventional induction melting technique was employed rather than arc melting, for mass production compatibility, and the thermoelectric properties of the materials were analyzed. The maximum dimensionless.....
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Cited By 1
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U
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M
A
T
L
A
B
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u
l
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n
k
매트랩/시뮬링크 simulation model을 이용한 열전 모듈의 효율 예측
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이나영, 예성욱, Rahman Jamil Ur, 탁장렬, 조중영, 서원선, 신원호, Walter Commerell, 남우현, 노종욱
Korean J. Met. Mater.
2021;59(11):829-837. Published online 2021 Oct 28
DOI:
https://doi.org/10.3365/KJMM.2021.59.11.829
Abstract
Development new high-performance thermoelectric materials for more efficient power generation systems and eco-friendly refrigerating systems has been challenging. Over the past few decades, thermoelectric studies have been focused on increasing the thermoelectric properties of materials. However, for conventional applications, developing of thermoelectric devices or modules with lower cost and.....
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Korean J. Met. Mater.
2021;59(10):724-731. Published online 2021 Sep 6
DOI:
https://doi.org/10.3365/KJMM.2021.59.10.724
Abstract
In this study, tetrahedrite compounds doped with Sn were prepared by mechanical alloying and hot pressing, and their charge transport and thermoelectric properties were analyzed. X-ray diffraction analysis revealed that both the synthetic powders and sintered bodies were synthesized as a single tetrahedrite phase without secondary phases. Densely sintered specimens.....
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Cited By 3
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Korean J. Met. Mater.
2021;59(8):560-566. Published online 2021 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.8.560
Abstract
Tetrahedrite is a promising thermoelectric material mainly due to its low thermal conductivity, a consequence of its complicated crystal structure. However, tetrahedrite has a high hole concentration; therefore, optimizing carrier concentration through doping is required to maximize the power factor. In this study, Te-doped tetrahedrites Cu
12
Sb
4-y
Te
y
S
13
(0.1 ≤ y ≤.....
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Cited By 1
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Korean J. Met. Mater.
2021;59(6):422-429. Published online 2021 May 26
DOI:
https://doi.org/10.3365/KJMM.2021.59.6.422
Abstract
Permingeatites Cu
3
Sb
1−y
Ge
y
Se
4
(0 ≤ y ≤ 0.14) were synthesized by mechanical alloying and hot pressing. The charge-transport parameters (Hall coefficient, carrier concentration, mobility, and Lorenz number) and thermoelectric properties (electrical conductivity, Seebeck coefficient, power factor, thermal conductivity, and figure of merit) were examined with respect to the Ge doping level......
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Cited By 1
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Korean J. Met. Mater.
2021;59(5):329-335. Published online 2021 Apr 6
DOI:
https://doi.org/10.3365/KJMM.2021.59.5.329
Abstract
Mn-doped tetrahedrites Cu
12-x
Mn
x
Sb
4
S
13
(0.1 ≤ x ≤ 0.4) were synthesized by mechanical alloying (MA) and sintered by hot pressing (HP). A single tetrahedrite phase was synthesized by MA without post-annealing, and it was stable without any phase changes after HP. The hot-pressed specimens had a relative density higher than 98.6%......
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Cited By 1
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Korean J. Met. Mater.
2021;59(4):239-246. Published online 2021 Mar 24
DOI:
https://doi.org/10.3365/KJMM.2021.59.4.239
Abstract
La/Ce-partially double-filled and Co-charge-compensated (La
1−z
Ce
z
)
0.8
Fe
4−x
Co
x
Sb
12
skutterudites were synthesized, and their thermoelectric properties were studied by varying the filling ratio and charge compensation. X-ray diffraction analysis revealed that the matrix phase was skutterudite and a secondary phase was determined to the marcasite FeSb
2
. However, the formation of marcasite could be inhibited.....
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Cited By 1
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캐리어 산란 메커니즘에 따른 열전반도체의 이론 전자수송 특성 변화
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김상일, 김현식
Korean J. Met. Mater.
;59(2):127-134. Published online 2021 Jan 27
DOI:
https://doi.org/10.3365/KJMM.2021.59.2.127
Abstract
The widespread application of thermoelectric devices in cooling and waste heat recovery systems will be achieved when materials achieve high thermoelectric performance. However, improving thermoelectric performance is not straightforward because the Seebeck coefficient and electrical conductivity of the materials have opposite trends with varying carrier concentration. Here, we demonstrate that.....
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Cited By 1
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페르미 면 형상제어에 따른 Bi-Sb-Te 이론 전자수송 특성 변화
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김상일, 임종찬, 양희선, 김현식
Korean J. Met. Mater.
2021;59(1):54-60. Published online 2021 Jan 5
DOI:
https://doi.org/10.3365/KJMM.2021.59.1.54
Abstract
Using thermoelectric refrigerators can address climate change because they do not utilize harmful greenhouse gases as refrigerants. To compete with current vapor compression cycle refrigerators, the thermoelectric performance of materials needs to be improved. However, improving thermoelectric performance is challenging because of the trade-off relationship between the Seebeck coefficient and.....
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Cited By 1
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n
-type Cu
0.008
Bi
2
Te
2.7-x
Se
0.3
열전 합금에서 Te 공공 형성에 의한 열전 성능 연구
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양예림, 김태완, 홍석원, 안지우, 김상일
Korean J. Met. Mater.
2020;58(10):721-727. Published online 2020 Oct 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.10.721
Abstract
In this study, we report the influence of Te vacancy formation on the thermoelectric properties of
n
-type Cu
0.008
Bi
2
Te
2.7
Se
0.3
alloys, including their electronic and thermal transport properties. Te-deficient Cu
0.008
Bi
2
Te
2.7-x
Se
0.3
(
x
= 0, 0.005, 0.01 and 0.02) samples were systematically synthesized and characterized. Regarding electronic transport properties, carrier concentration was increased with.....
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Cited By 1
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Zn 도핑이 Cu
2
Se의 상전이 거동과 열전수송특성에 미치는 영향
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진승현, 임영수
Korean J. Met. Mater.
2020;58(7):466-471. Published online 2020 Jul 5
DOI:
https://doi.org/10.3365/KJMM.2020.58.7.466
Abstract
We report on the phase transition behavior and thermoelectric transport properties of Zn-doped Cu
2
Se. Cu
2
Se is comprised of nontoxic, low-cost and abundant elements, and has been attracting attention because of its very high thermoelectric performance,
ZT
, at high temperatures. Many studies have reported enhanced
ZT
in impurity doped Cu
2
Se, however,.....
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Cu 첨가에 따른 p-type Bi
0.5
Sb
1.5
Te
3
및 Bi
0.4
Sb
1.6
Te
3
합금의 양극성 전도 저감 효과
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조현준, 김현식, 손웅희, 김상일
Korean J. Met. Mater.
2020;58(6):439-445. Published online 2020 May 21
DOI:
https://doi.org/10.3365/KJMM.2020.58.6.439
Abstract
In this study, we report how Cu doping can modify the thermoelectric performance of
p
-type Bi
0.5
Sb
1.5
Te3 and Bi
0.4
Sb
1.6
Te3 thermoelectric alloys, including their electronic and thermal transport properties. For electronic transport, the power factors of both Bi
0.5
Sb
1.5
Te3 and Bi0.4Sb1.6Te3 compositions were increased by Cu doping. The origins of the enhanced power.....
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Cited By 1
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Korean J. Met. Mater.
2020;58(5):348-352. Published online 2020 Apr 20
DOI:
https://doi.org/10.3365/KJMM.2020.58.5.348
Abstract
Layered post transition metal chalcogenides such as SnSe, SnSe
2
, In
2
Se
3
, and In
4
Se
3
have attracted attention as promising thermoelectric materials due to their intrinsically low lattice thermal conductivities. Recently,
n
-type indium selenide (InSe) based materials have also been suggested as good candidates for thermoelectric materials by optimizing their electrical properties, i.e.,.....
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Cited By 5
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Korean J. Met. Mater.
2020;58(5):340-347. Published online 2020 Apr 20
DOI:
https://doi.org/10.3365/KJMM.2020.58.5.340
Abstract
Tetrahedrite (C
12
Sb
4
S
13
) has attracted attention as a p-type thermoeletric material with very low thermal conductivity induced by the anharmonic oscillation of Cu due to the lone-pair electrons of Sb. Many studies have been conducted to improve its thermoelectric performance by partially substituting the transition elements for the Cu sites. In.....
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Cited By 7
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