Materials Today Physics最新文献

{"title":"Data-driven design of high-curie temperature full-heusler alloys for spintronic applications","authors":"Quynh Anh T. Nguyen ,&nbsp;Thi H. Ho ,&nbsp;Tran Bao Tien ,&nbsp;Yoshiyuki Kawazoe ,&nbsp;Viet Q. Bui","doi":"10.1016/j.mtphys.2024.101541","DOIUrl":"10.1016/j.mtphys.2024.101541","url":null,"abstract":"<div><p>In this study, we employ density functional theory (DFT) and subgroup discovery (SGD) to explore the structural and magnetic properties of full cubic Heusler compounds, with a particular emphasis on their Curie temperatures (T_c) and magnetic stability. Our comprehensive examination of 2903 structures across both L2₁ and Xa phases identifies configurations that exhibit both structural stability and superior magnetic properties. Notable among these, compounds such as Co₂MnSi, Co₂CrGe, and Cr₂VGe exhibit remarkable magnetic stability, maintaining their ferromagnetic properties well above room temperature. Co₂MnSi displays a substantial magnetic moment of 5.00 μB and maintains its ferromagnetic properties up to a Curie temperature of 937 K, underscoring its suitability for high-temperature applications. Similarly, Co₂CrGe, with a magnetic moment of 4.00 μB, transitions to a paramagnetic state at a higher temperature of 952 K, demonstrating enhanced thermal durability. Moreover, Cr₂VGe, notable for its robust magnetic moment of 2.81 μB, retains its ferromagnetic characteristics until an exceptional 2412 K, making it extremely valuable for thermally intensive environments. These findings underscore the potential of these materials in developing durable and efficient spintronic devices that operate under extreme thermal conditions. By mapping the interplay between electronic structure and magnetic properties, our study provides a predictive framework for optimizing the performance of spintronic materials.</p></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"47 ","pages":"Article 101541"},"PeriodicalIF":10.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Giant spin seebeck effect with highly polarized spin current generation and piezoelectricity in flexible V2SeTeO altermagnet at room temperature","authors":"Abd ullah ,&nbsp;Djamel Bezzerga ,&nbsp;Jisang Hong","doi":"10.1016/j.mtphys.2024.101539","DOIUrl":"10.1016/j.mtphys.2024.101539","url":null,"abstract":"<div><p>Studies on altermagnetic materials are attracting extensive research efforts owing to their directional dependent spin split band structure. However, it is rare to find reports on the possibility of multifunctionality in altermagnetic systems. Here, we explore the spin dependent transport properties and piezoelectricity of two-dimensional V₂SeTeO altermagnet. The V₂SeTeO system has a direct band gap of 0.32 eV with a Neel temperature of 510 K. We find a giant effective Seebeck coefficient of 0.64 mV/K at 300 K. This is several times larger than that found in bulk and other two-dimensional materials. Moreover, the effective Seebeck effect is entirely determined by either only spin-up or spin-down component. This feature implies that we can generate highly spin polarized current by temperature gradient at room temperature. We attribute this pure spin current generation to the directional dependent spin split band structure. Along with the spin dependent transport properties, we also find that the Janus V₂SeTeO altermagnet shows outstanding flexibility and piezoelectric response with out-of-plane piezoelectric coefficient of <span><math><mrow><msub><mi>d</mi><mn>31</mn></msub><mo>=</mo><mn>0.245</mn><mspace></mspace><mtext>pm</mtext><mo>/</mo><mi>V</mi><mtext>.</mtext></mrow></math></span> Overall, we propose that the V₂SeTeO altermagnet system exhibits multifunctional physical properties at room temperature, and this can be utilized for potential spintronics and flexible piezoelectric applications simultaneously.</p></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"47 ","pages":"Article 101539"},"PeriodicalIF":10.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142149761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual center luminescence properties of LiGaAl4O8:Cr3+ near infrared phosphors for LED applications","authors":"Luhui Zhou ,&nbsp;Dashuai Sun ,&nbsp;Guan Peng ,&nbsp;Zeyu Lyu ,&nbsp;Zheng Lu ,&nbsp;Pengcheng Luo ,&nbsp;Congcong Fan ,&nbsp;Xiaowei Zhang ,&nbsp;Hongpeng You","doi":"10.1016/j.mtphys.2024.101540","DOIUrl":"10.1016/j.mtphys.2024.101540","url":null,"abstract":"<div><p>Near-infrared (NIR) phosphor-converted light emitting diodes (NIR pc-LEDs) hold great promise for applications in night vision imaging, nondestructive analysis, and plant growth. Although some NIR phosphors have been developed in recent years, there are fewer studies on Cr³⁺-doped multisite luminescent phosphors. Here, we report a novel LiGaAl₄O₈:<em>x</em>Cr³⁺ (LGAO:Cr³⁺) phosphors with double Cr³⁺ luminescence centers. At low doping concentration, LGAO:Cr³⁺ is dominated by the emission of Cr1. With the increase of doping concentration <em>x</em>, the Cr2 portion of emission intensity increases due to the increased probability of the energy transfer from Cr1 to Cr2. Finally, using the LGAO:0.02Cr³⁺ NIR phosphor and a commercial 410 nm chip, a NIR pc-LED prototype with a NIR output power of 43.7 mW at 100 mA drive current and a photovoltaic conversion efficiency of 19.2 % at 10 mA was fabricated and its application in visual inspection of precise devices and angiography was demonstrated. This work provides an in-depth and careful study of the luminescent mechanism of the dual-centerd NIR phosphor and serves as a good paradigm for the development of NIR pc-LEDs.</p></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"47 ","pages":"Article 101540"},"PeriodicalIF":10.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142098189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel non-invasive method for measuring the spatial kinematic behavior of cardiomyocytes regulated by mechanical cues","authors":"Si Tang ,&nbsp;Huiyao Shi ,&nbsp;Jialin Shi ,&nbsp;Zhenghua Wang ,&nbsp;Dingyi Wang ,&nbsp;Chanmin Quanmin Su ,&nbsp;Lianqing Liu","doi":"10.1016/j.mtphys.2024.101543","DOIUrl":"10.1016/j.mtphys.2024.101543","url":null,"abstract":"<div><p>The intact heart undergoes complex and multiscale mechanical remodeling processes. Measuring rhythmic spatial contraction of the myocardium is crucial for assessing mechanical durability and the ability to mount coordinated responses to pressure, electrical, and hemodynamic signals. However, current cardiomyocyte measurement platforms typically focus on action potentials and XY-plane contractions. Therefore, effective evaluation methods for studying the influence of mechanical cues on the spatial dynamic contraction of cardiomyocytes are still lacking. In this study, we developed a topographic guiding combined with an optical spatial motion tracking method to provide controllable mechanical stimulation for inducing directed contraction of cardiomyocytes and obtaining spatial motion information <em>in vitro</em>. We first performed a detailed investigation of cell connections and cytoskeleton orientations by combining the proposed method with immunofluorescence. Next, spatial constrictive modes, features, and key parameters of microgroove-guided cardiomyocytes were studied. Finally, the three-dimensional (3D) motions of the cardiomyocytes at different positions on the structure were compared. We found that the XY-plane contraction of cardiomyocytes typically has only one direction and shows a significant phase delay compared to the axial motion. In addition, cardiomyocytes located near the edges of the microgrooves were restricted by stronger mechanical forces, resulting in a significant height change reduction. These results provide new perspectives for structural and functional research on cardiomyocytes under long-term mechanical regulation. Overall, this study provides a highly precise and convenient method for evaluating the 3D cardiomyocyte motion under mechanical induction. This method is expected to enhance understanding of cardiomyocyte development and be useful for research on cardiac mechanics and functions.</p></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"47 ","pages":"Article 101543"},"PeriodicalIF":10.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142129573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Excellent energy-storage performance in BNT-BT lead-free ceramics through optimized electromechanical breakdown","authors":"Liang Wang,&nbsp;Wenjun Cao,&nbsp;Cen Liang,&nbsp;Changyuan Wang,&nbsp;Hanyu Zhao,&nbsp;Chunchang Wang","doi":"10.1016/j.mtphys.2024.101545","DOIUrl":"10.1016/j.mtphys.2024.101545","url":null,"abstract":"<div><p>Dielectric capacitors with high recoverable energy storage density (<em>W</em>_rec) are in urgent demand for clean energy technologies. However, their lower breakdown strength (<em>E</em>_b) strongly limits their energy storage performance. We, herein, propose a facile method to enhance <em>E</em>_b by enhancing mechanical strength via second phase modulation. The efficiency of this method is validated in the (1-<em>x</em>)(0.94Na_0.5Bi_0.5TiO₃-0.06BaTiO₃)-<em>x</em>Sr(Ta_0.5Sb_0.5)O₃ ((BNT-BT)-<em>x</em>STS, <em>x</em> = 0.1, 0.15, 0.2, 0.25, and 0.3) ceramics. The introduction of Sr(Ta_0.5Sb_0.5)O₃ (STS) increases the relaxor degree, refines grain size, and most importantly, creates a second phase of BiSb₂O₇, which hinders dislocation movement and improves mechanical strength. Our results show that the breakdown strength strongly depends on the mechanical strength. The highest hardness of 7.42 GPa accompanied by the largest <em>E</em>_b of 620 kV/cm was obtained in (BNT-BT)-0.25STS sample. The sample exhibits the best energy storage properties of a large <em>W</em>_rec = 8.3 J/cm³, a high efficiency of 82.3 %, and excellent temperature/frequency stability. Furthermore, the sample also exhibits good charge/discharge stability and ultra-fast transient discharge time (62.26 ns). This work provides a theoretical guidance for developing lead-free dielectrics with superior energy-storage performance.</p></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"47 ","pages":"Article 101545"},"PeriodicalIF":10.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142136541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly efficient halogen-free rigid and flexible binary organic solar cells using new solid indacene additive","authors":"Vijaya Gopalan Sree ,&nbsp;Thavamani Gokulnath ,&nbsp;Bommaramoni Yadagiri ,&nbsp;Jung Inn Sohn ,&nbsp;Hyun-Seok Kim ,&nbsp;Chinna Bathula","doi":"10.1016/j.mtphys.2024.101538","DOIUrl":"10.1016/j.mtphys.2024.101538","url":null,"abstract":"<div><p>Flexible Organic solar cells (OSCs) have garnered widespread attention due to the increased popularity of wearable electronic devices. To enhance the efficiency and stability of the device we have prepared (2E,2′E)-3,3'-(4,4,9,9-tetrahexadecyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b'] dithiophene-2,7-diyl)bis(2-cyanoacrylic acid) <strong>(</strong>IDT) based dopant by reacting the aldehyde precursor with cyanoacetic acid in the presence of piperdine. Here, we investigate the effect of IDT on the performance of OSCs by adding IDT to star active layers PM6:Y6 and PM6:BTP-eC9 to improve OSCs' performance through morphology optimization. The addition of 5 wt% IDT significantly improved the device performance, achieving a remarkable PCE of 16.08 % for PM6:Y6 devices. The charge transport and recombination dynamics analysis showed that the appropriate concentration of IDT can provide better channels for carrier transport, promoting effective charge generation and extraction in OSCs. It is observed that the addition of IDT promotes effective generation and dissociation of excitons, thus improving OSC performance. The flexible ITO-free OSC was fabricated using PM6:Y6:IDT as the active layer film, achieving a high PCE of 12.59 % with V_OC, <em>J</em>_SC, and FF of 0.83 V, 23.21 mA/cm² and 68.63 %, respectively. Hence, the findings indicate a reliable approach which could potentially deliver rigid and flexible OSCs with excellent performance and commercial viability.</p></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"47 ","pages":"Article 101538"},"PeriodicalIF":10.0,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142039905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3D hydrophobic wood membrane with micro-nano baffle structure for multifunctional air purification filters: “Kill three eagles with one arrow”","authors":"Chen Chen ,&nbsp;Wenping Li ,&nbsp;Shijun Xing ,&nbsp;Junjie Yu ,&nbsp;Qingxue Li ,&nbsp;Ruizhen Hu ,&nbsp;Lihong Liu ,&nbsp;Jiazhi Yang ,&nbsp;Qiaofeng Han","doi":"10.1016/j.mtphys.2024.101535","DOIUrl":"10.1016/j.mtphys.2024.101535","url":null,"abstract":"<div><p>Air pollution has presented an imminent threat to the world. Multifunctional filters with high filtration efficiency, low pressure drop, moisture resistance, antibacterial properties, and renewability are urgently needed to be developed. In this study, multifunctional wood filters are innovatively designed with a baffle structure combining macroscopic structural design and microscopic in-situ synthesis of silver nanoparticles (Ag NPs). The filter has excellent particle removal efficiency (PM_0.3, 98.5 %), exceptional volatile organic compounds (VOCs) adsorption efficiency (98.4 % for formaldehyde and 91.7 % for xylene), high sterilization efficiency (99.99 %) and excellent regeneration ability (performance recovery to 98 % of the initial). Furthermore, personal protective masks were assembled by the prepared filters, whose process of replacing element is as simple as replacement of electric mosquito incense tablets. This innovative filter holds promise for applications such as daily protection, sudden accidents and prevention and control of respiratory infectious diseases. We envision that the functionally modified Ag NPs wood filters with a multilayer structure offer a comprehensive solution for more effective air purification in polluted environment.</p></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"47 ","pages":"Article 101535"},"PeriodicalIF":10.0,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142012508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MXene-based conductive hydrogels with toughness and self-healing enhancement by metal coordination for flexible electronic devices","authors":"Hongyan Yin,&nbsp;Lizhi Chen,&nbsp;Fangfei Liu,&nbsp;Tursun Abdiryim,&nbsp;Jiaying Chen,&nbsp;Xinyu Jing,&nbsp;Yancai Li,&nbsp;Mengyao Su,&nbsp;Xiong Liu","doi":"10.1016/j.mtphys.2024.101537","DOIUrl":"10.1016/j.mtphys.2024.101537","url":null,"abstract":"<div><p>MXene-based conductive hydrogels have emerged as a new type of soft materials in flexible electronics. Herein, metal coordination is introduced into MXene-based conductive hydrogels to synchronously enhance the mechanical and self-healing properties. MXene-based conductive hydrogels are made up of polyacrylic acid (PAA), sium carboxymethyl cellulose (SCMC), Ti₃C₂T_X and metal ions (Ni²⁺, Al³⁺ or Sn⁴⁺). PAA/SCMC/Ti₃C₂T_X/Sn⁴⁺ hydrogel is found to have excellent mechanical (stress: 122 kPa; strain: 1688 %; toughness: 0.95 ± 0.12 MJ m⁻³) and self-healing (self-healing efficiency: 99.27 % (conductivity); 81.16 % (stress); and 83.13 % (strain)) properties due to the metal coordination and H-bonding. The hydrogel has also good conductivity of 0.82 S m⁻¹ and adhesion of 38.94 kPa. The flexible sensors based on this hydrogel can efficiently detect human motions, electromyography (EMG), electrocardiography (ECG) and handwriting signals. Furthermore, a supercapacitor assembled from this hydrogel has a high specific capacitance of 118.66 F g⁻¹ and good stability (15000 charge-discharge cycles). This work provides an effective strategy for exploiting mechanically tough and self-healing MXene-based conductive hydrogels with prospective applications in flexible electronics.</p></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"47 ","pages":"Article 101537"},"PeriodicalIF":10.0,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142012507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Birefringence modulation via intense coherent phonons engineering with asymmetric VO2/TiO2 heterostructures","authors":"Ziyue Wang ,&nbsp;Fan Zhang ,&nbsp;Pierre Vallobra ,&nbsp;Yongshan Liu ,&nbsp;Xiaoqiang Zhang ,&nbsp;Yong Xu ,&nbsp;Jiangxiao Li ,&nbsp;Yun Sun ,&nbsp;Yue Zhang ,&nbsp;Bin Hong ,&nbsp;Weisheng Zhao","doi":"10.1016/j.mtphys.2024.101533","DOIUrl":"10.1016/j.mtphys.2024.101533","url":null,"abstract":"<div><p>The ultrafast modulation of optical crystal birefringence, involving rapid deformations of crystalline lattices, holds significant scientific and technological importance. High-frequency coherent phonons, through transient perturbation of lattice order, have emerged as a powerful tool for modifying the properties of materials. Here, we systematically investigate coherent phonons in the asymmetric crystal directions [011], [110], and [100] of VO₂/TiO₂ heterostructures. Notably, in the (011)-VO₂/TiO₂ system, a remarkable shear mode coherent phonon signal was excited, exhibiting a marginally higher intensity compared to the longitudinal mode. By changing the probe light polarization, we observed a fascinating reversal in the birefringence sign induced by the giant coherent phonons. Density functional theory (DFT) calculations indicate that TiO₂ possesses excellent photoelastic properties, with strong coherent phonons efficiently modulating refractive index anisotropy, accounting for this phenomenon. This finding provides novel insights into the development of ultrafast acousto-optic devices.</p></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"47 ","pages":"Article 101533"},"PeriodicalIF":10.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141909610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A novel characteristic curve for thermoelectric cooler application in realistic thermal circumstances: Theory and experiment","authors":"Hongkun Li ,&nbsp;Xiang Liu ,&nbsp;Jingxuan Wang ,&nbsp;Weidong Zheng ,&nbsp;Weiqun Liu ,&nbsp;Qiao Zhu","doi":"10.1016/j.mtphys.2024.101534","DOIUrl":"10.1016/j.mtphys.2024.101534","url":null,"abstract":"<div><p>On the materials level, the performance of thermoelectric (TE) devices can be defined by the thermoelectric figure of merit (<em>zT</em>). This, however, does not provide a complete picture due to the complex interplay between electronic and thermal transport properties and the uncertain thermal impedance matching between external and internal thermal resistances in different realistic thermal circumstances. Appropriate design of individual material properties and geometry parameters considering the realistic thermal circumstance can greatly enhance the device-level performance of TE devices. In this work, we develop a framework to clarify such interactions in thermoelectric coolers (TEC) with a newly proposed <em>q-h</em> characteristic curve, which can be used to identify how a TEC design is of effectiveness for a specific realistic thermal circumstance. The effects of <em>zT</em>, the individual TE material properties (i.e., thermal conductivity <em>k</em>, electrical conductivity σ and Seebeck coefficient S) as well as the geometry parameters (i.e., pillar height and filling factor) on the <em>q-h</em> characteristic curve are theoretically and experimentally investigated, respectively. TEC modules with higher <em>zT</em>, short pillars and high filling factor show stronger capability to handle high heat flux load, especially for the cases with high heat dissipation coefficient at hot side. The thermal property (<em>k</em>) and electrical properties (σ and S) are responsible for the low heat flux load (e.g., wearable TEC) and high heat flux load (e.g., on-chip TEC cooling), respectively. For wearable TEC, increasing the internal thermal resistance can prevent the back flow heat, which can be achieved with tall pillars, low filling factor and optimizing <em>zT</em> towards lowering thermal conductivity <em>k</em>. For on-chip TEC cooling, reducing the Joule heating and increasing the thermoelectric effect become dominant factors in lowering the code-side temperature of TEC modules. This can be achieved with short pillars, high filling factor and optimizing <em>zT</em> towards increasing the power factor <em>S</em>^<em>2</em>σ. This work provides significant insights into the complex interplay between material-level properties, device-level parameters and the external thermal circumstance in determining the performance of TEC devices. The results enable researchers to design optimal TEC devices for realistic applications with different boundary conditions.</p></div>","PeriodicalId":18253,"journal":{"name":"Materials Today Physics","volume":"47 ","pages":"Article 101534"},"PeriodicalIF":10.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141979911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}