JOURNAL OF ELECTRONIC MATERIALS
·
2018
·Vol. 48
·期 4
·1840-1845
·
IF 1.566
Sun Fu-Hua,Dong Jinfeng,Tang Huaichao,Zhuang
Hua-Lu,Li Jing-Feng
Cu 12 Sb 4 S 13 tetrahedrite is an abundant natural that is also environmentally friendly. There have been efforts made to reach a unity of ZT value through optimizing the interdependence of electrical and thermal performance. In this study, we reported on ZnO nanoparticles-dispersed Cu 11.5 Ni 0.5 Sb 4 S 13− δ composites that were synthesized by the mechanical alloying and spark plasma sintering method. The structural characterizations were conducted via scanning electron microscopy, electronic probe microscopic analysis and transmission electron microscopy. The ZnO-nanoparticles were uniformly distributed in the Cu 12 Sb 4 S 13 grains. ZnO was used as a heterogeneous nucleation site to reveal the effectiveness of reducing thermal conductivity, likely derived from the strong low/mid-frequency phonon scattering. The lowest lattice thermal conductivity, 0.33 W m −1 K −1 , was obtained at 673 K in 0.5 vol.% of ZnO sample. A small quantity of ZnO addition led to a high ZT ∼ 1.0 at 723 K, which increased by ∼ 42% in the pure-phased Cu 12 Sb 4 S 13− δ sample.
研究领域:
材料科学
·
热电材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2015
·
IF 2.999
Wei Guo,Jianmin Ma,Wenjun Zheng
Bi 2 Te 3 assembled by disordered nanosheets with defects was prepared using a one-step easy synthesis strategy based on easy solvothermal synthesis routes. The high compatibile plane structure, minimization of nucleation and interfacial angle energies are the driving force of the crystal connection and the formation of the defects. To survey the impact of the defects on their thermoelectric properties, thermoelectric properties of bulk pellets have been investigated, and they exhibited preferable thermoelectric properties with a high ZT value of 0.68 due to its unique structural characteristics.
研究领域:
材料科学
·
热电学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 34
·13171-13175
·
IF 8.262
Zhiwei Zhou,Junyou Yang,Qinghui Jiang,Yubo Luo,Dan Zhang,Yangyang Ren,Xu He,Jiwu Xin
We studied the effect of doping with Bi on the thermoelectric properties of SnTe-based materials. Doping with Bi reduced the density of holes and increased the Seebeck coefficient over a wide temperature range as a result of modulation of the carrier concentration and an increase in the density of states effective mass. The lattice thermal conductivity was also greatly reduced as a result of the wide frequency range of phonon scattering by multiscale architectures derived from Bi doping. A maximum ZT value of c. 1.1 at 873 K was obtained in Sn0.94Bi0.06Te, an enhancement of 165% compared with the undoped sample.
研究领域:
材料科学
·
热电材料研究
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2017
·Vol. 37
·期 4
·343-350
·
IF 1.189
Qin Bing-Chao,Xiao Yu,Zhou Yi-Ming,Zhao Li-Dong
IV–VI compounds are considered as promising thermoelectric materials, and high thermoelectric performance was achieved in IV–VI solid solutions. In this work, the thermoelectric properties of Pb–Sn–Te–Se-based solid solutions were systematically investigated. Among these solid solutions, it is found that a figure of merit ( ZT ) peak value of 1.0 at 873 K can be obtained in (PbTe) 0.5 (SnTe) 0.5 , on account of the combination of superior electrical properties in SnTe and low thermal conductivity in PbTe. Furthermore, we investigated and summarized the thermoelectric transport properties and proposed the thermoelectric performance maps for the IV–VI solid solutions in Pb–Sn–Te–Se system. This comprehensive investigation on Pb–Sn–Te–Se-based solid solutions can effectively guide and scan thermoelectric performance for a given unknown composition and enhance the thermoelectric properties in IV–VI compounds. Graphical
研究领域:
材料科学
·
凝聚态物理
·
功能材料
·
热电转换
·
半导体物理
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·Vol. 45
·期 5
·117112
·
IF 5.8
Yaqian Du,Jianbo Li,Jun Wang
Compared with perovskite SrTiO 3 , SrO(SrTiO 3 ) 2 exhibits lower thermal conductivity , while maintaining a high Seebeck coefficient , making it a promising material for photothermoelectric conversion. However, the relationship between its infrared and thermoelectric properties remains unexplored. This study examines the effect of Gd doping on these properties of SrO(SrTiO 3 ) 2 . Increased Gd doping induces a gradual transformation of SrO(SrTiO 3 ) 2 -based into a SrTiO 3 -based material, resulting in a composite comprising three phases and a notable reduction in thermal conductivity . At 973 K, the thermal conductivity decreases to a minimum of 1.4 W m −1 K −1 , which is 23 % lower than undoped SrO(SrTiO 3 ) 2 and 51 % lower than SrTiO 3 . Like SrTiO 3 , SrO(SrTiO 3 ) 2 absorbs infrared radiation in the 8–14 μm range. Although the highest ZT value reaches only 0.06 at 973 K, it shows a positive correlation with infrared emissivity. These findings are valuable for advancing the application of thermoelectric effects and the development of high-performance infrared materials.
研究领域:
材料科学
·
凝聚态物理
·
功能材料
·
能源材料
·
红外光学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Zhang Lin,Shi Xiao-Lei,Shang Hongjing,Gu Hongwei,Chen Wenyi,Li Meng,Huang Daxing,Dong Hao,Wang Xiaolei,Ding Fazhu,Chen Zhi-Gang
Flexible thermoelectric materials and devices hold enormous potential for wearable electronics but are hindered by inadequate material properties and inefficient assembly techniques, leading to suboptimal performance. Herein, we developed a flexible thermoelectric film, comprising Ag 2 Se nanowires as the primary material, a nylon membrane as a flexible scaffold, and reduced graphene oxide as a conductive network, achieving a record-high room-temperature ZT of 1.28. Hot-pressed Ag 2 Se nanowires exhibited strong (013) orientation, enhancing carrier mobility and electrical conductivity. Dispersed reduced graphene oxide further boosts electrical conductivity and induces an energy-filtering effect, decoupling electrical conductivity and the Seebeck coefficient to achieve an impressive power factor of 37 μW cm −1 K −2 at 300 K. The high-intensity between Ag 2 Se and reduced graphene oxide interfaces enhance phonon scattering, effectively reducing thermal conductivity to below 0.9 W m −1 K −1 and enabling the high ZT value. The nylon membrane endowed the film with exceptional flexibility. A large-scale out-of-plane device with 100 pairs of thermoelectric legs, assembled from these films, delivers an ultrahigh normalized power density of >9.8 μW cm −2 K −2 , outperforming all reported Ag 2 Se-based flexible devices. When applied to the human body, the device generated sufficient power to operate a thermo-hygrometer and a wristwatch, demonstrating its practical potential for wearable electronics.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
·
2019
·
IF 4.833
Hua-Li Yang,Si-Qiang Fang,Yan-Wei Tang,Cheng Wang,Heng Luo,Lai-Liang Qu,Jin-Hua Zhao,Cun-Jian Shi,Fu-Cheng Yin,Xiao-Bing Wang,Ling-Yi Kong
The formation of amyloid- β (A β ) plaques in the brain is one of the main pathological features of Alzheimer's disease (AD). The imaging probes, capable of detecting A β deposition, are important tools for early diagnosis of AD. In this article, we designed, synthesized and evaluated a cyanine-based near-infrared fluorescence (NIRF) probe ZT-1 for the detection of A β deposits in the brain. The probe had excellent fluorescent properties with an emission maximum above 720 nm upon binding to A β aggregates with affinity of 445.0 nM ( K d ). Furthermore, ZT-1 exhibited good biostability, photostability, and binding selectivity toward A β 1-42 aggregates by in vitro fluorescence staining experiments. In vivo NIRF imaging result also revealed that our probe could efficiently differentiate transgenic and wild-type mice. All these studies indicated that ZT-1 is a promising fluorescent probe for A β plaques in the AD brains.
研究领域:
医学
·
神经科学
·
分子影像学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2017
·
IF 3.454
Yun-Qiao Tang,Zhen-Hua Ge,Yue-Xing Chen,Peng Qin,Jing Feng,Jiaqing He
Cu-Se compounds have attracted more attentions as a low-cost, low toxicity thermoelectric materials. In this work, p-type Cu 2 Se x compound powders were prepared by solution syntheses, including the wet chemistry method and hydrothermal synthesis method. The reaction mechanisms were investigated, showing that the NaOH contents affected the phase structure of the final product. Polycrystalline Cu 2 Se x bulk materials were obtained by densifying the powders using spark plasma sintering (SPS) and obtained the maximum ZT value of 0.75 at 623 K, which is currently the highest reported value for the Cu-Se system at this temperature. We also found that the introduced oxides could suppress the long-range migration of Cu ions in Cu-Se system to avoid the decomposition of the materials.
研究领域:
材料科学
·
热电材料
✓ 已验证
产品关联
DOI
高影响因子
Frontiers of Physics
·
2018
·Vol. 14
·期 1
·1-12
·
IF 1.892
Chen Ye,Wang Dongyang,Zhou Yuling,Pang Qiantao,Shao Jianwei,Wang Guangtao,Wang Jinfeng,Zhao Li-Dong
Recently, bismuth sulfide (Bi 2 S 3 ) has attracted much attention in the thermoelectric community owing to its abundance, low cost, and advanced properties. However, its poor electrical transport properties have prevented Bi 2 S 3 devices from realizing high thermoelectric performance. In this work, our motivation is to decrease the large electrical resistivity, which is recognized as the origin of the low ZT value in undoped Bi 2 S 3 . We combined melting and spark plasma sintering (SPS) in a continuous fabrication process to produce Bi 2 S 3- x Se x ( x = 0, 0.09, 0.15, 0.21) and Bi 2 S 2.85- y Se 0.15 Cl y ( y = 0.0015, 0.0045, 0.0075, 0.015, 0.03) samples. Our results show that Se alloying at S sites can narrow the band gap and activate intrinsic electron conduction, leading to a high power factor of ~ 2.0 μW·cm -1 ·K -2 cat room temperature in Bi 2 S 2.85 S 0.15 , about 100 times higher than that of undoped Bi 2 S 3 . Moreover, our further introduction of Cl atoms into the S sites resulted in a second-stage optimization of carrier concentration and simultaneously reduced the lattice thermal conductivity, which contributed to a high ZT value of ~ 0.6 at 723 K for Bi 2 S 2.835 Se 0.15 Cl 0.015 . Our results indicate that high thermoelectric performance could be realized in Bi 2 S 3 with earth-abundant and low-cost elements.
研究领域:
材料科学
·
热电学
·
固体物理学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Xin Fan,Yaqi Chen,Qi Chen,Yao Wang,Dayi Zhou,Lijie Chang,Xinjian Li,Yuewen Zhang,Hongan Ma,Xiaopeng Jia
A series of graphene-S 0.05 Co 4 Sb 11.6 Te 0.4 (C x -S 0.05 Co 4 Sb 11.6 Te 0.4 ) composite polycrystalline skutterudite materials with graphene stoichiometric ratio of x = 0, 0.05, 0.10, 0.20 have been successfully prepared by high pressure and high temperature (HPHT) technology. Graphene is a two-dimensional material with large carrier mobility and large specific surface area. Through microscopic observation, it is found that graphene is attached to the grains in the sample. At the same time, with the increase of graphene content, grain growth is inhibited. Graphene addition reduces the thermal conductivity of skutterudite by increasing grain boundaries and achieves the purpose of optimizing its thermoelectric properties. At the same time, there are numerous lattice defects and distortions introduced in skutterudite synthesized by HPHT technology. Finally, the samples were synthesized under the conditions of 1.5 GPa and 900 K. The lattice thermal conductivity of the graphene composite sample C x -S 0.05 Co 4 Sb 11.6 Te 0.4 with x = 0.10 reaches a minimum of 0.99 at 773 K, and the zT value of this sample is 1.25 at 773 K, which is greater than pure S 0. 05 Co 4 Sb 11.6 Te 0.4 , its zT value is 1.00 at 773 K. Compared with the method of synthesizing skutterudite under normal pressure, the HPHT technology can dramatically reduce the reaction time from several days to less than 30 min, while forming a high-pressure airtight reaction environment, which can effectively prevent the volatilization and oxidation of samples during the reaction process, thus providing a convenient method for synthesizing thermoelectric materials quickly and efficiently.
研究领域:
材料科学
·
热电材料研究
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jia Liang,Xuefei Zhang,Chunlei Wan
Inorganic thermoelectric (TE) materials with outstanding capacity for energy conversion are expected to be promising eco-friendly and renewable power sources, but they are always intrinsically brittle, restricting their development in flexible TE electronics. Therefore, we have developed a facile manufacturing method of large-scale all-inorganic silver chalcogenide foils and flexible TE generators in this work. A rolling process, as an effective and facile molding technique, is applied in ductile TE materials. The figure-of-merit for flexibility of this free-standing foil is in the range of 0.02–0.13, suggesting the superior flexibility of the all-inorganic TE foils. A high TE figure-of-merit ZT of 0.47 at room temperature is reached for Ag2S0.45Se0.45Te0.1, which is one of the most promising room-temperature ZTs among flexible TE materials. A proof-of-concept flexible TE generator based on silver chalcogenide foils achieves an open-circuit voltage of 1.19 mV and an output power density of 1.8 mW/m2 with a temperature difference of 2.7 °C across the TE leg, showing great potential in heat-to-electricity conversion.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 8
·2510-2515
·
IF 4.029
Yuqing Yang,Xiaocun Liu,Xin Liang
We report the enhanced thermoelectric properties of p-type BiCuSeO by tin doping on bismuth sites. Powder X-ray diffraction analysis and Hall measurements indicated effective tin doping in all samples. We found that the doping efficiency of Sn is lower than expected, as seen from the measured carrier concentration. First-principles calculations indicate that the Sn lone pair modifies the band structure at the Fermi level, with the consequent effect observed in the electrical transport and Seebeck coefficient measurements. An enhanced thermoelectric power factor of ∼2.5 μW cm−1 K−2 was reached at 773 K. No significant effect of Sn doping on the thermal conductivity was found; a thermoelectric figure of merit value (ZT) of 0.3 at 773 K is achieved for Bi0.9Sn0.1CuSeO, which is more than twice that of the pristine BiCuSeO.
研究领域:
材料科学
·
凝聚态物理
·
无机非金属材料
·
能源材料
·
半导体物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）