ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chengjun Li,Wang Li,Chengwei Sun,Zheng Ma,Yingchao Wei,Wenyuan Ma,Boyu Yang,Xin Li,Yubo Luo,Junyou Yang
Bi2Te3-based thin films are gaining recognition for their remarkable room temperature thermoelectric performance. Beyond the conventional “process–composition–performance” paradigm, it is highly desirable to explore new methods to enhance their performance further. Here, we designed a sandwich-structured Ag/PZT/PVDF/Bi0.5Sb1.5Te3(BST) thin film device and effectively regulated the performance of the BST film by controlling the polarization state of the PZT/PVDF layers. Results indicate that polarization induces interlayer charge redistribution and charge transfer between PZT/PVDF and BST, thereby achieving the continuous modulation of the electrical transport characteristics of BST films. Finally, following polarization at a saturation voltage of 3 kV, the power factor of the BST film increased by 13% compared to the unpolarized condition, reaching 20.8 μW cm–1 K–2. Furthermore, a device with 7 pairs of P–N legs was fabricated, achieving a cooling temperature difference of 11.0 K and a net cooling temperature difference of 2.4 K at a current of 10 mA after the saturation polarization of the PZT/PVDF layer. This work reveals the critical effect of introducing ferroelectric layer polarization to achieve excellent thermoelectric performance of the BST film.
研究领域:
材料科学
·
能源技术
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DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 21
·3883
·
IF 5.719
Hongyu Zhou,Huang Liu,Guoping Qian,Peng Xu,Huanan Yu,Jun Cai,Jianlong Zheng
Driven by the huge thermal energy in cement concrete pavements, thermoelectric (TE) cement has attracted considerable attention. However, the current TE cement shows poor performance, which greatly limits its application. Herein, a series of Bi0.5Sb1.5Te3/carbon nanotubes (CNTs) co-reinforced cement composites have been prepared, and their TE properties were systematically investigated. It was shown that the addition of Bi0.5Sb1.5Te3particles can effectively improve the TE properties of CNTs-reinforced cement composites by building a better conductive network, increasing energy filtering and interfaces scattering. The Bi0.5Sb1.5Te3/CNTs cement composites with 0.6 vol.% of Bi0.5Sb1.5Te3exhibits the highest ZT value of 1.2 × 10−2, increased by 842 times compared to that of the CNTs-reinforced cement composites without Bi0.5Sb1.5Te3. The power output of this sample with the size of 2.5 × 3.5 × 12 mm3reaches 0.002 μW at a temperature difference of 19.1 K. These findings shed new light on the development of high-performance TE cement, which can guide continued advances in their potential application of harvesting thermal energy from pavements.
研究领域:
材料科学
·
能源工程
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 24
·2200307
·
IF 19.924
Xiaodong Wang,Jinxuan Cheng,Li Yin,Zongwei Zhang,Xinyu Wang,Jiehe Sui,Xingjun Liu,Jun Mao,Feng Cao,Qian Zhang
Bismuth telluride alloys favor the applications of low-grade waste heat recovery if their figure-of-merits are improved within the larger temperature range from 300 to 523 K. Herein, this work reports a synergistic optimization for Bi 0.5 Sb 1.5 Te 3 (BST) by incorporating the copper(II) phthalocyanine (CuPc), which is preferentially distributed at the grain boundary of BST after the spark plasma sintering process and suppresses the grain growth of BST. The lattice thermal conductivity of composites is then extensively reduced by the multiscale scattering induced by the CuPc. In addition, the Cu atoms diffuse into the lattice of BST and increase the whole concentration, thus suppressing the bipolar effect. As a result, the average zT value is effectively enhanced from 0.7 to 1.1 in the temperature range between 300 and 523 K. A high conversion efficiency of 6.8% is achieved in a single BST/CuPc 5 leg, which is 41.7% higher than that of BST at temperature different Δ T = 223 K. This result proves that the composition optimization of the BST/CuPc is a promising strategy to improve the application of BST-based TE modules.
研究领域:
材料科学
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热电学
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能量转换
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纳米复合材料
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固体物理
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DOI
高影响因子
Science China-Chemistry
·
2016
·Vol. 59
·期 10
·1264-1269
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IF 2.429
Liu Gang,Xue Zhenjie,Xu Guiying,Yan Cong,Wang Tie
In this paper, PbTe nanocubes are assembled on Bi 0.5 Sb 1.5 Te 3 substrates with both ordered and disordered structures through a straightforward method to form a P-N section. The work function of such semiconductor system is then measured by the ultraviolet photoelectron spectroscopy. This results show that the work function of orderly arrayed PbTe deposition is much lower than the disordered assemblies. Such change of the work function provides the possibility to tune it in a P-N section system. The change of the work function is attributed to the less surface roughness and easier electron escaping in the ordered structures.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
ACS Applied Electronic Materials
·
2026
·
IF 4.7
Yujuan Pei,Shuo Gong,Miaoran Kang,Hanxu Zhang,Weilong Deng,Qiang Fu,Yu Sui,Xianjie Wang,Bo Song
Bi0.5Sb1.5Te3 (BST) has attracted much attention owing to its special physical properties, including strong surface carrier mobility and narrow band gap. In this study, the photoelectric performance of the photodetector based on BST/Si heterojunctions was systematically investigated. Our photodetector accomplishes a large self-powered position sensitivity (405 mV/mm) and a detectivity of 3.1 × 1011 Jones. The relaxation times of the lateral photovoltaic voltage reached 0.106 μs. The BST/Si heterojunction achieves broad-spectrum photodetection covering a spectrum from visible light to the infrared wavelength range, with a photoelectrical bandwidth exceeding 15 kHz. This research demonstrates the considerable potential of ultrafast response photodetectors for self-powered position-sensitive detectors, imaging, and object recognition in future.
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高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2026
·Vol. 132
·期 4
·336
·
IF 3
Du Xinli,Yu Jian,Ke Shaoqiu,Wei Mingxu,Dong Xiurong,Nie Xiaolei,Zhu Wanting,Wei Ping,Zhang Yu,He Danqi,Liu Mingrui,Hua Lin,Hu Zhili,Zhao Wenyu,Zhang Qingjie
Thermoelectric (TE) materials enable direct thermal-electric energy conversion, but Bi 2 Te 3 -based alloys suffer from limited thermoelectric performance and controversial doping mechanisms of Cu, hindering their practical application in waste heat recovery. To address these issues, this work designs and synthesizes a series of zone-melted p-type Bi 0.5 Sb 1.5*(1− x ) Cu 1.5* x Te 3 +3 wt % Te ( x = 0.0–2.0%) samples. The results show that Cu occupies interstitial sites, suppresses Te volatilization to increase the hole concentration, and enhances the electrical conductivity. Concurrently, lattice distortions and secondary phases reduced lattice thermal conductivity. The 1.0% Cu-doped sample achieves a maximum power factor of 4.74 mW·m − 1 ·K − 2 at 300 K, a peak zT of 1.03 at 412 K, and an average zT of 0.91 (300–500 K), representing improvements of 7%, 8.4%, and 18% over the undoped matrix. Subsequent hot deformation further reduced lattice thermal conductivity but did not enhance zT due to an anomalous rise in carrier concentration and decreased mobility. This study clarifies the interstitial Cu doping mechanism, providing a viable strategy for optimizing Bi 2 Te 3 -based materials.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Zichen Wei,Zhili Li,Pengfei Luo,Jiye Zhang,Jun Luo
To improve the thermoelectric properties of a material, the carrier concentration needs to be optimized first. But the increase of carrier concentration usually results in degraded carrier mobility , which restricts the enhancement in thermoelectric performance. Herein, we report the Cd doped Bi 0.5 Sb 1.5 Te 3 which overcomes such a trade-off between carrier concentration and mobility. The doping of Cd results in significantly increased hole concentration, which successfully suppresses the bipolar diffusion. Meanwhile, magnetic measurements indicate that the Hall mobility increases with the doping of Cd owing to the decrease of anti-site defects. Thus, simultaneous increase of carrier concentration and mobility is realized in p-type Bi 0.5 Sb 1.5 Te 3 through Cd doping, resulting in significantly enhanced power factor. In addition, the lattice disorder induced by the substitution of Cd for Sb/Bi leads to an obvious reduction in lattice thermal conductivity . As a result, a zT value of 1.2 at 120 °C is achieved for the 2 at% Cd doped sample. The peak zT of the 4 at% Cd doped sample is shifted to 185 °C due to the effectively suppressed bipolar effect and an average zT value of ∼1.0 is obtained in the temperature range of 50–300 °C. Our achievement demonstrates that there is still a significant room to improve the thermoelectric properties of the intensively investigated BiSbTe system by simply doping a properly selected element.
研究领域:
热电材料
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材料科学
·
固体物理
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Deyu Bao,Qiang Sun,Linsen Huang,Jie Chen,Jun Tang,Dali Zhou,Min Hong,Lei Yang,Zhi-Gang Chen
Tremendous efforts have been focusing on the improvement of p-type (Bi, Sb) 2 Te 3 -based thermoelectric materials for commercial applications. In this study, we achieve versatile interface engineering through a surface decoration of Bi 0.5 Sb 1.5 Te 3 by amorphous Sb 2 S 3 combining with spark plasma sintering, which introduces semi-coherent Sb/Bi 0.5 Sb 1.5 Te 3 interfaces and dopes S into Bi 0.5 Sb 1.5 Te 3 . Semi-coherent Sb/Bi 0.5 Sb 1.5 Te 3 interfaces strongly scatter phonons and lower energy carriers, leading to decreased thermal conductivity and increased Seebeck coefficient, while the electrical conductivity is not sacrificed due to the compromise of the slightly reduced carrier mobility by interfacial scattering and the increased carrier concentration by S doping. Benefited from the decoupled thermoelectric properties, a significantly enhanced power factor of 3345.40 μW m −1 K −2 and a low thermal conductivity of 0.78 W m −1 K −1 is obtained in Bi 0.5 Sb 1.5 Te 3 -0.4%Sb 2 S 3 , leading to a high peak zT of ∼ 1.31 at 330 K, which shows a 54% enhancement compared with pristine Bi 0.5 Sb 1.5 Te 3 . Moreover, a conversion efficiency of ∼ 7.6% can be predicted in a single leg Bi 0.5 Sb 1.5 Te 3 -0.4%Sb 2 S 3 -based module under a cold side temperature of 300 K and hot side temperature of 480 K. This study paves a facile amorphous Sb 2 S 3 induced interface engineering strategy for the development of high performance (Bi,Sb) 2 Te 3 -based thermoelectric materials.
研究领域:
材料科学
·
能源科学
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DOI
高影响因子
Journal of Materiomics
·
2026
·
IF 10.6
Qiuyuan Liang,Shiyuan Zhao,Sijing Zhu,Zhongwei Zhang,Jie Gao,Tianle Liu,Jun-Liang Chen,Jianhua Zhou,Huajun Lai,Lei Miao
A polymer interlayer strategy was developed for screen-printed Bi 2 Te 3 -based films. • The film retains 94.16% conductivity after 5000 bending cycles at 15 mm. • Ag doping yields a high power factor of 3040.59 μW·m –1 ·K –2 at 423 K. Screen-printed Bi 2 Te 3 -based films are promising for large-scale flexible thermoelectric applications in wearable devices, however, the bending stability of such films is severely limited by the poor adhesion between the film and the commonly used polyimide substrate. To address this issue, this work introduces a polymer interlayer with low-softening-point between the thermoelectric film and the substrate to form a robust, molecular-scale bonded interface during sintering, which effectively mitigates bending-induced delamination and cracking of the Bi 2 Te 3 -based film. Consequently, the Ag-doped Bi 0.5 Sb 1.5 Te 3 film exhibits excellent mechanical stability, retaining over 94.16 % of the initial conductivity after 5000 bending cycles at a bending radius of 15 mm. Furthermore, Ag doping optimizes electrical performance by simultaneously increasing carrier concentration through cationic substitution and promoting a highly ordered lamellar structure that suppresses grain boundary scattering. This dual effect yields a superior power factor of 3040.59 μW·m –1 ·K –2 at 423 K. A thermoelectric generator fabricated from five film legs achieves a maximum output power density of 24.30 μW·mm –2 at a temperature difference of 30 K, demonstrating the practical viability of this approach for wearable applications. Download: Download high-res image (349KB) Download: Download full-size image
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DOI
高影响因子
Small
·
2023
·Vol. 20
·期 19
·2306786
·
IF 13.3
Qinghui Jiang,Deng Pan,Yunfan Wang,Yong Liu,Yubo Luo,Junyou Yang,Baowen Li,Steve Dunn,Haixue Yan
There is increasing demand to power Internet of Things devices using ambient energy sources. Flexible, low-temperature, organic/inorganic thermoelectric devices are a breakthrough next-generation approach to meet this challenge. However, these systems suffer from poor performance and expensive processing preventing wide application of the technology. In this study, by combining a ferroelectric polymer (Polyvinylidene fluoride (PVDF, β phase)) with p-type Bi 0.5 Sb 1.5 Te 3 (BST) a thermoelectric composite film with maximum is produced power factor. Energy filter from ferroelectric-thermoelectric junction also leads to high Seebeck voltage ≈242 µV K −1 . For the first time, compelling evidence is provided that the dipole of a ferroelectric material is helping decouple electron transport related to carrier mobility and the Seebeck coefficient, to provide 5× or more improvement in thermoelectric power factor. The best composition, PVDF/BST film with BST 95 wt.% has a power factor of 712 µW•m −1 K −2 . A thermoelectric generator fabricated from a PVDF/BST film demonstrated P max T 12.02 µW and P density 40.8 W m −2 under 50 K temperature difference. This development also provides a new insight into a physical technique, applicable to both flexible and non-flexible thermoelectrics, to obtain comprehensive thermoelectric performance.
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DOI
高影响因子
Advanced Science
·
2025
·Vol. 12
·期 27
·2502832
·
IF 14.1
Kai-Yu Yang,Xiaoyuan Li,Yuanxin Jiang,Liangliang Wang,Kai Guo,Lei Miao,Junliang Chen,Jiye Zhang,Lin Li,Yusong Du,Guang-Hui Rao,Jun Luo,Jing-Tai Zhao
Segmentation is a widely adopted strategy to enhance the efficiency of medium- and high-temperature thermoelectric devices by capitalizing on the distinct properties of materials across various temperature ranges. Establishing a highly compatible matching relationship is crucial for maximizing conversion efficiency. In this study, the concepts of materials’ compatibility factor and relative current density into the screening process are emphasized for universal adaptability. The effectiveness and practicality of the theoretical model for optimal segmented combinations are validated through COMSOL finite element simulations and experimental results. A segmented thermoelectric power generation device is constructed that integrates the environmentally friendly n-type Mg 3 (Sb,Bi) 2 with the optimal segmented pairing of Bi 0.5 Sb 1.5 Te 3 -GeTe. Notably, at a temperature difference of Δ T = 440 K, this device achieves a maximum conversion efficiency of 10.4% and a peak output power of 0.41 W. These findings provide a solid theoretical foundation for the development of efficient combinations of thermoelectric materials.
研究领域:
材料科学
·
能源工程
·
热电学
·
器件优化
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产品关联
DOI
PubMed
高影响因子
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