ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Guibin Zhang,Xin Wang,Yaqian Du,Jun Wang,Xuebing Yang,Ta La,Jianbo Li
SrTiO3 exhibits promising potential in both thermoelectric and optical properties. However, research on these two properties has consistently been carried out in two relatively independent fields. In this work, the regulatory mechanisms of thermoelectric and optical properties were proposed based on photon-excited electron–phonon interactions. Er doping can enhance the photon absorption of SrTiO3 by introducing impurity energy levels, thereby promoting photoexcited electron generation. The introduction of oxygen vacancies (Vo) enhances the interaction between excited electrons and phonons through defect levels, facilitating the conversion of photon energy into thermal energy and subsequently into electrical energy. Additionally, Er–Nb codoping with Vo synergistically optimizes thermoelectric properties, thereby laying a foundation for the regulation of photothermoelectric properties. As a result, significant photothermoelectric conversion was obtained in the Sr0.85Er0.15Ti0.9Nb0.1O3 (Vo) sample. A maximum ZT value of 0.32 at 1073 K was achieved in this sample, representing a 60% improvement over previously reported Nb-doped SrTiO3 samples. The electrical output power of the Sr0.85Er0.15Ti0.9Nb0.1O3 (Vo) sample reaches 3.85 μW under portable 980 nm laser excitation at 260 mW incident power. These findings provide valuable insights into the conversion of light energy to electrical energy in highly absorptive SrTiO3-based thermoelectric materials.
研究领域:
材料科学
·
热电学
·
光电子学
·
能量转换
·
固体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACTA MATERIALIA
·
2024
·
IF 8.3
Fanshi Wu,Yifan Shi,Wanjia Zhang,Wei Zhao,Hao Yang,Wenxin Lai,Yue Lou,Zhenhua Yan,Zhan Shi,Zhenhua Ge,Xiyang Wang,Liangwei Fu,Biao Xu
Sub-nanomaterials possess unprecedented size-dependent properties compared to conventional nanomaterials, which endow them with great potential in catalysis, biomedicine, sensors, and so on. However, their applications in thermoelectrics are unknown due to poor thermal stability and low yields. Herein, we construct a series of thermoelectric composites by incorporating highly thermally stable and commercial fullerene sub-nanoclusters (C 60 or C 70 ). We find that sub-nanoclusters as the second phase can conduce to optimized carrier concentration through charge transfer at interfaces while the carrier mobility is significantly enhanced due to atom orbital hybridization and size-dependent electrical scattering mechanism. Furthermore, the ultra-low thermal conductivity of C 60 due to its distorted chemical bonding and sub-nanometer pore, and the interfacial thermal resistance greatly suppress the phonon transport. Consequently, the 0.15 mol.% C 60 /Bi 0.4 Sb 1.6 Te 3 realizes an ultra-high ZT of ∼1.6 at 373 K, an excellent thermoelectric conversion efficiency of ∼7.4 %, and a huge cooling performance of ∼73 K. This work demonstrates the application of sub-nanomaterials in thermoelectrics and may shed light on other fields such as electronic devices, thermal management, and fullerene chemistry.
研究领域:
材料科学
·
热电学
·
纳米技术
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Lujie Dong,Ping Zhang,Wei Hu,Xingyou Tian,Xian Zhang,Jian Zhang,Hui Zhang
Current solar energy conversion materials based on the photo-thermo-electric effect faced challenges such as intermittent energy conversion, as well as a certain waste of resources and equipment due to unable to work at night. In order to address these issues, we have developed a film for power generation based on the photothermal and thermoelectric effects. In the composite film, the superconducting carbon black connected Bi 2 Te 2.7 Se 0.3 established an effective conductive pathway in the polyimide (PI), resulting in a Seebeck coefficient (S) of −95 μVK −1 , and a thermoelectric figure of merit (ZT) of 0.18 × 10 −3 for the composite film. Based on the photothermal and thermoelectric effects, the voltage output of the composite film during the day can be simulated and regulated by adjusting the power parameters of the laser emitter and the position of the laser. The composite film generated an output voltage of 5 mV owing to the exceptional thermoelectric effect. At night, Peltier effect and Joule heating effect permitted the attainment of a maximum temperature of 93 °C and a maximum temperature differential of 10 °C when the load voltage was 2 V. A homemade four-legged thermoelectric system achieved an output voltage of 227 mV and an output power of 2.659 mW at a laser power of 1.5 W/cm 2 . Concurrently, the composite film exhibited optimal mechanical characteristics, and bending cycle stability. As a result, this study provided a novel idea for the multifunctional integration, which not only provided efficient output during the day but also temperature control at night.
研究领域:
材料科学
·
能量转换
·
热电材料
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光热转换
·
柔性电子学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-13
·
IF 14.7
Gong Yaru,Dou Wei,Lu Bochen,Zhang Xuemei,Zhu He,Ying Pan,Zhang Qingtang,Liu Yuqi,Li Yanan,Huang Xinqi,Iqbal Muhammad Faisal,Zhang Shihua,Li Di,Zhang Yongsheng,Wu Haijun,Tang Guodong
N -type polycrystalline SnSe is considered as a highly promising candidates for thermoelectric applications due to facile processing, machinability, and scalability. However, existing efforts do not enable a peak ZT value exceeding 2.0 in n -type polycrystalline SnSe. Here, we realized a significant ZT enhancement by leveraging the synergistic effects of divacancy defect and introducing resonance level into the conduction band. The resonance level and increased density of states resulting from tungsten boost the Seebeck coefficient. The combination of the enhanced electrical conductivity (achieved by increasing carrier concentration through WCl 6 doping and Se vacancies) and large Seebeck coefficient lead to a high power factor. Microstructural analyses reveal that the co-existence of divacancy defects (Se vacancies and Sn vacancies) and endotaxial W- and Cl-rich nanoprecipitates scatter phonons effectively, resulting in ultralow lattice conductivity. Ultimately, a record-high peak ZT of 2.2 at 773 K is achieved in n -type SnSe 0.92 + 0.03WCl 6 .
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
Journal of Materiomics
·
2022
·
IF 8.589
Sitong Wei,Boyi Wang,Zipei Zhang,Wenhao Li,Lu Yu,Shikai Wei,Zhen Ji,Weiyu Song,Shuqi Zheng
The previous works commonly adjust the carrier concentration through acceptor doping, but at the same time, the decrease of the Seebeck coefficient limits the further improvement of electrical properties in Cu 3 SbSe 4 -based materials. In this work, a microwave-assisted hydrothermal synthesis method was used to synthesize Cu 3 SbSe 4 /TiO 2 hollow microspheres. Part of TiO 2 participates in the reaction, replaces the Sb site of Cu 3 SbSe 4 to form holes, and the rest is dispersed in the matrix in the form of the second phase. The first-principles calculations reveal that the doping of Ti significantly changes the band structure and phonon spectrum, thereby regulating carrier concentration while increasing phonon scattering. In addition, experimental results show that the energy filtering effect generated by the extra-mixed TiO 2 nano particles, which suppresses the decrease of Seebeck coefficient by acceptor doping. Consequently, the highest average power factor 897.5 μW m −1 K −2 and the zT peak value of 0.70 can be obtained in Cu 3 SbSe 4 /6%TiO 2 sample at 298–623 K. This work provides a new sight to improve the thermoelectric properties in Cu 3 SbSe 4 through carrier concentration regulation and nano-phase composition.
研究领域:
材料科学
·
热电学
·
纳米材料
·
固体物理
✓ 已验证
产品关联
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
·
热电学
·
能量转换
·
纳米复合材料
·
固体物理
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Zhiliang Li,Zheng Su,Hongxia Zhang,Qing Wang,Jianglong Wang,Xin Qian,Qian Cao,Zhihai Ding,Jing-Feng Li,Shufang Wang
Higher manganese silicide (HMS) is a naturally abundant, environmentally friendly, and mechanically robust P-type thermoelectric (TE) semiconductor. Isoelectronic doping elements Re and Ge are used to partially occupy cation (Mn) and anion (Si) sites, respectively. Compared with the single Re-doped strategy, TE performance is further improved in the isoelectronic double-doped Mn 0.96 Re 0.04 (Si 0.96 Ge 0.04 ) 1.79 composition. The electrical conductivity (∼54.2 × 10 3 S m –1 at 823 K) is double that of pure HMS (∼26.1 × 10 3 S m –1 ), whereas the power factor increases from ∼1.42 × 10 –3 W m –1 K –2 to ∼1.80 × 10 –3 W m –1 K –2 due to the increase in carrier concentration caused by the decreased band gap (from 0.82 eV to 0.74 eV), as well as the embedding of the Si, Ge nanodispersions with low work functions. Furthermore, the substitution of Re and Ge increases the amounts of lattice defects, and the presence of nanoscale Ge precipitates cause the broadband phonon-scattering effect in the HMS matrix. Finally, the lattice thermal conductivity at 673 K decreases from ∼2.18 W m –1 K –1 to ∼1.60 W m –1 K –1 . The zT value at 823 K increases by ∼36% from 0.45 to 0.61. The strategy of cation and anion double doping can effectively improve the TE properties of materials, which has significance for the optimization of other materials.
研究领域:
材料科学
·
热电学
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiale Sun,Yanan Liu,Junjie Wei,Peng Wei,Tao Chen
Ionic conductive gel based self-powered sensor has attracted much attention in Internet of Things era, due to its softness, versatility, electrical conductivity, iontronics and responsiveness. However, its multi-scene application is limited by few types of these perceptible signals. Herein, a photosensitive Janus ionogel with pseudo-photoelectric effect based on cascade conversion is reported, with seebeck coeffect of 19.5 mV K −1 and ZT value of 0.63. Significantly, the photosensitive Janus ionogel can generate different temperature gradients on the different intensity of sunlight, and convert solar energy into electric energy by the “light-thermal-electric” cascade conversion, demonstrating its great potential in solar energy utilization and light sensing. This investigation paves a promising and versatile way to construct photosensitive conductive materials for next-generation solar self-powered devices.
研究领域:
材料科学
·
能量转换
·
传感器
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2015
·
IF 6.723
Heng Quan Yang,Lei Miao,Cheng Yan Liu,Chao Li,Sawao Honda,Yuji Iwamoto,Rong Huang,Sakae Tanemura
Antimony telluride (Sb2Te3) and its based alloys are of importance to p-type semiconductors for thermoelectric applications near room temperature. Herein, we report a simple, low-energy intensive, and scalable surfactant-assisted reflux method for the synthesis of Sb2Te3 nanoparticles in the solvent ethylene glycol (EG) at low temperatures (120–180 °C). The formation mechanism of platelike Sb2Te3 nanoparticles is proposed. Also, it is found that the size, shape, and chemical composition of the products could be controlled by the introduction of organic surfactants (CTAB, PVP, etc.) or inorganic salts (EDTA-Na2, NaOH, etc.). Additionally, the collected Sb2Te3 nanoparticles were further fabricated into nanostructured pellets using cold-compaction and annealing techniques. Low resistivity [(7.37–19.4) × 10–6 Ω m], moderate Seebeck coefficient (103–141 μV K–1), and high power factor (10–16 × 10–4 W m–1 K–2) have been achieved in our Sb2Te3-nanostructured bulk materials. The relatively low thermal conductivity (1.32–1.55 W m–1 K–1) is attained in the nanobulk made of PVP-modified nanoparticles, and values of ZT in the range of 0.24–0.37 are realized at temperatures ranging from 50 to 200 °C. Our researches set forth a new avenue in promoting practical applications of Sb2Te3-based thermoelectric power generation or cooling devices.
研究领域:
材料科学
·
纳米技术
·
热电学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2024
·
IF 16.8
Chenghao Zhang,Kangpeng Jin,Hongliang Dong,Wenlong Xu,Pengfei Xu,Zhenhua Yan,Weiyun Zhao,Biao Xu,Liangwei Fu
Modulating electrical and thermal transport through zero-dimensional point defects and one-dimensional dislocations are extensively investigated. However, the systematic study of exploring single-atom-layer vacancies for improving thermoelectric (TE) performance remains rare. In this study, we modulate the number density of single-atom-layer two-dimensional (2D) Te vacancies in lead telluride (PbTe) for the first time through bismuth and indium doping. DFT calculations reveal (Bi, In) co-doping lowers the formation energy of such defects, confirming the feasibility of this method. 2D Te vacancies simultaneously enhance phonon scattering and evoke bond softening, significantly lowering the lattice thermal conductivity . Meanwhile, indium doping generates resonant level in the energy band, which increases the carrier concentration without deteriorating the Seebeck coefficient drastically. As a result, a peak TE figure of merit ( zT ) of ∼1.6 and an average zT ( zT avg ) of 1.17 are achieved in the (Bi, In) co-doped PbTe. Furthermore, a high conversion efficiency of 6.5 % is obtained for the fabricated 2-pair module at a temperature difference of 500 K.
研究领域:
材料科学
·
热电学
·
凝聚态物理
·
缺陷工程
·
能量转换
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2016
·Vol. 18
·期 46
·31821-31827
·
IF 4.449
Dan Feng,Zhen-Hua Ge,Di Wu,Yue-Xing Chen,Tingting Wu,Ju Li,Jiaqing He
We present in this manuscript that enhanced thermoelectric performance can be achieved in polycrystalline SnSe prepared by hydrothermal reaction and spark plasma sintering (SPS). X-ray diffraction (XRD) patterns revealed strong orientation along the [l 0 0] direction in bulk samples, which was further confirmed by microstructural observation through transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM). It was noticed that the texturing degree of bulk samples could be controlled by sintering temperature during the SPS process. The best electrical transport properties were found in the sample which sintered at 450 °C in the direction vertical to the pressing direction, where the highest texturing degree and mass density were achieved. Coupled with the relatively low thermal conductivity, an average ZT of ∼ 0.38, the highest ever reported in pristine polycrystalline SnSe was obtained. This work set up a forceful example that a texture-control approach can be utilized to enhance the thermoelectric performance effectively.
研究领域:
材料科学
·
热电学
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 24
·2313719
·
IF 18.5
Yingchao Wei,Zheng Ma,Wang Li,Chengjun Li,Boyu Yang,Chengwei Sun,Shuangfu Gang,Wenguang Zhang,Hui Long,Xin Li,Qinghui Jiang,Dan Zhang,Yubo Luo,Junyou Yang
Exploring N-type High-entropy materials with both high thermoelectric and mechanical properties is highly desirable for all-high-entropy thermoelectric generators (TEGs) since the thermoelectric and mechanical properties of N-type one are largely behind its P-type counterparts. Herein, a new rock-salt structure N-type high entropy thermoelectric AgBiPbSe 2 S is introduced with a bandgap of ≈0.43 eV. The atomic radii difference of each component results in a large lattice distortion of 0.246, leading to a low thermal conductivity of 0.36 W m −1 K −1 at 823 K. The figure of merit ( ZT ) reaches 0.6 for AgBiPbSe 2 S at 823 K. Moreover, Ag 2 Se precipitates are included in AgBiPbSe 2 S to filter low energy carriers for high Seebeck coefficients and to scatter phonons with nanoscale wavelength for ultralow lattice thermal conductivities. Consequently, a peak ZT of ≈1.18 at 823 K and an average ZT of 0.60 at 400–823 K are obtained for Ag 1.02 BiPbSe 2 S. More importantly, high mechanical properties are also obtained in Ag 1.02 BiPbSe 2 S, of which the Vickers hardness and flexural strength are ≈209 Hv and 32 MPa, respectively, originating from the enhanced lattice friction by chemical short-range disorder (i.e., high entropy effect) and dispersion strengthening caused by Ag 2 Se nanoprecipitates.
研究领域:
热电材料
·
材料科学
·
高熵材料
·
半导体物理
·
材料力学性能
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）