Article
Chemistry, Physical
Vikash Sharma, Divya Sharma, Ranu Bhatt, Pankaj K. Patro, Gunadhor Singh Okram
Summary: We report on the thermoelectric properties of nickel-doped Ag2-xNixTe nanostructures in a certain temperature range. The material undergoes a metal-insulator transition with increasing nickel doping concentration. The electrical resistivity and Seebeck coefficient show linear relationships with temperature. The material achieves higher thermoelectric coefficient through a sharp decrease in thermal conductivity associated with a structural phase transition.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Construction & Building Technology
Xiaoli Liu, Ming Qu, Alan Phong Tran Nguyen, Neil R. Dilley, Kazuaki Yazawa
Summary: The research investigates thermoelectric cement candidates for building envelope applications, studying the impact of additives graphite and MnO2, as well as two different fabrication methods (wet-mixing and dry-mixing) on thermoelectric performance. The DynaCool Physical Properties Measurement System was used to test the thermoelectric properties of candidates, revealing that the thermoelectric cement with 10% graphite and 5% MnO2 has the highest ZT value at 350 K.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Joao Ider, Adhimar Oliveira, Rero Marques Rubinger
Summary: Due to the rising cost of energy and the continuous development of thermoelectric materials, a new system for characterizing thermoelectric generation devices has been proposed, which can significantly reduce errors and costs.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Materials Science, Multidisciplinary
Ashutosh Kumar, D. Sivaprahasam, Ajay D. Thakur
Summary: The study investigates the thermoelectric properties of a LaCoO3/La0.7Sr0.3CoO3 nanostructured composite, showing that manipulating the thermoelectric parameters through composite approach improves the zT value significantly.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Vikrant Trivedi, Minati Tiadi, Budaraju Srinivasa Murty, Dillip K. Satapathy, Manjusha Battabyal, Raghavan Gopalan
Summary: By tailoring interface carrier filtering, we achieved a very high thermoelectric figure-of-merit in skutterudite nanocomposites, resulting in a significant increase in the Seebeck coefficient and a reduction in thermal conductivity.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Chemistry, Multidisciplinary
Mustafa Majid Rashak Al-Fartoos, Anurag Roy, Tapas K. Mallick, Asif Ali Tahir
Summary: Amidst global challenges, thermoelectricity offers a promising solution for sustainable energy by converting waste heat into electricity. However, obstacles such as high cost, toxicity, and reliance on rare-earth elements hinder the development of high-performance thermoelectric materials.
Article
Chemistry, Multidisciplinary
Anand Pal, K. Shyam Prasad, K. Gurukrishna, Suraj Mangavati, P. Poornesh, Ashok Rao, Yin-Chun Chung, Y. K. Kuo
Summary: We investigated the synthesis protocols and properties of pure and Pb-doped Cu3Sb1-xPbxSe4 (0 <= x <= 0.04) polycrystalline samples in order to achieve a high figure of merit (ZT). The samples exhibited a tetragonal structure and their electrical resistivity increased with increasing Pb content. The conduction mechanism was found to be dominated by holes, and the samples showed a narrow bandgap behavior. The estimated ZT values showed significant enhancement for the doped samples.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Engineering, Electrical & Electronic
Ganapathy Saravanavel, Sanath Kumar Honnali, K. Shifana Lourdes, Sanjay John, K. R. Gunasekhar
Summary: Al-ZnO thin-film stacks were fabricated using the PVD process, with ZnO films of different oxygen compositions. The deposition parameters were found to influence the thermoelectric properties of the thin film. The stack with ZnO oxygen composition of 80.45% exhibited the best linear response between 360 K and 400 K.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Chemistry, Multidisciplinary
Kamal Kumar Choudhary, Vinod Rathore, Ramesh Chandra Dixit, Netram Kaurav
Summary: The effect of nanoparticle size on the thermoelectric properties of Bi2Te3 nanoparticles is analyzed using a phonon scattering mechanism. It is found that reducing the nanoparticle size increases the scattering of phonons with grain boundaries, leading to a decrease in thermal conductivity and an increase in Seebeck coefficient and ZT value.
Article
Materials Science, Multidisciplinary
Mumtaz Manzoor, Debidatta Behera, Ramesh Sharma, Muhammad Waqas Iqbal, Sanat Kumar Mukherjee, Rabah Khenata, Saleh S. Alarfaji, Huda A. Alzahrani
Summary: The structural, mechanical, optical, and thermoelectric properties of cubic perovskite GeTiO3 were investigated using first-principle calculations. The computed lattice constant agreed well with experimental results. Band structure calculations indicated that GeTiO3 had an indirect band gap of 2.517 eV. Optical spectra computations showed the dielectric function, reflectivity, and refractive index within the range of 0-10 eV. The Seebeck coefficient, electrical and thermal conductivity, and power factor were evaluated using Boltzmann transport theory, with a maximum power factor of approximately 9 x 1011 W/K2ms and 15.9 x 1011 W/K2ms at 1200 K for temperature and chemical potential, respectively. The high carrier mobility improved the thermoelectric performance of GeTiO3. These findings provide theoretical guidelines for future experimental and industrial applications of GeTiO3.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Xiaofei Sheng, Xiaoxiao Rao, Chunjing Liu, Lei Li, Fang Gao, Pengcheng Zhang
Summary: The electronic structures and thermoelectric properties of two-dimensional NaCuSe and NaCuTe were investigated using first principles calculations and Boltzmann transport theory. The monolayers were found to be direct semiconductors with narrow band-gaps of 1.18 and 1.53 eV, respectively. They exhibited high Seebeck coefficient (0.21 - 0.88 mV/K), high conductivity (-105 Ω-1m-1), high power factor (0.98 - 1.18 mW/mK2), and low lattice thermal conductivities of 0.10 - 0.23 W/mK. As a result, these monolayers showed high thermoelectric figure of merit of 0.46 - 0.73 at 300 K, and even higher values of 1.37 - 3.67 at 700 K.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Madhuvathani Saminathan, Jothilal Palraj, Prince Wesley, Manojkumar Moorthy, Ravikirana, Suresh Perumal
Summary: High density pellets of MnSi1.74, MnSi1.8 and MnSi1.9 were prepared by induction-melting and rapid induction hot-pressing. XRD, SEM, and EDS analyses confirmed the presence of fine precipitations of metallic MnSi in MnSi1.74 and Si in MnSi1.8 and MnSi1.9. The increase in Si content led to gradual decrease in electrical conductivity and significant increase in Seebeck coefficient, with notable reduction in total thermal conductivity for MnSi1.8 resulting in enhanced zT at high temperatures.
Review
Engineering, Electrical & Electronic
Abdullah F. Al Naim, Ahmed G. El-Shamy
Summary: Organic thermoelectric (TE) materials, especially PEDOT:PSS, have shown great potential in converting heat energy into electrical energy. The TE performance of PEDOT:PSS can be further improved by combining it with various composites, such as alloys, tellurium, nanocarbon structures, and ternary systems. In addition, inorganic fillers, including tellurium and other materials, have also been found to enhance the TE functions of PEDOT:PSS composites. This summary provides an overview of the recent advances in TE improvement and suggests future strategies for developing more effective organic thermoelectric materials.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Inorganic & Nuclear
Shakeel Ahmad Sofi, Dinesh C. Gupta
Summary: Thermoelectric materials, especially Heusler alloys, possess high melting points, thermal stability, and excellent elastic properties. Through the study of the structural, elasto-mechanical, and thermoelectric transport properties of Co2PAl materials, it is found that these alloys have potential advantages in high-temperature power generation thermoelectric applications.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Physics, Multidisciplinary
Murefah Mana Al-Anazy, Malak Azmat Ali, S. Bouzgarrou, G. Murtaza, Tahani Al-Muhimeed, Abeer A. AlObaid, Abeer Mera, Q. Mahmood, Ghazanfar Nazir
Summary: This study reported lead-free vacancy ordered double perovskites M2TeBr6 (M = Rb, Cs) as green energy materials based on calculations of structural, optical, and thermoelectric properties. The results suggested the potential use of these compounds in optoelectronic devices and thermoelectric power generation.
Article
Multidisciplinary Sciences
Masayuki Murata, Kazuo Nagase, Kayo Aoyama, Atsushi Yamamoto, Yuya Sakuraba
Summary: The study developed a thermoelectric module utilizing the Nernst effect as a prototype and evaluated its performance, but thermoelectric modules operating with the Nernst effect have not been implemented yet. The proposed module achieved an output power of 0.48 mW at a temperature difference of 149 K in a 5 T magnetic field.
Article
Engineering, Multidisciplinary
Xiaokai Hu, Atsushi Yamamoto
Summary: This study provides a detailed analysis of thermoelectric conversion for power generation, demonstrating the effects of contact electrical and thermal resistance as well as heat radiation. Experimental and numerical results are compared, showing a discrepancy in efficiency due to the inaccuracy of bulk resistivity. The study also offers an approach to quantifying contact resistances and heat radiation for checking material thermoelectric properties.
Article
Chemistry, Physical
Takashi Hagiwara, Koichiro Suekuni, Pierric Lemoine, Andrew R. Supka, Raju Chetty, Emmanuel Guilmeau, Bernard Raveau, Marco Fornari, Michihiro Ohta, Rabih Al Rahal Al Orabi, Hikaru Saito, Katsuaki Hashikuni, Michitaka Ohtaki
Summary: A new member of colusite, Cu26Ti2Sb6S32, was designed in this study by incorporating Ti4+ and Sb5+ cations into the structure, leading to improved thermoelectric performance, providing new possibilities for energy conversion and optoelectronic applications.
CHEMISTRY OF MATERIALS
(2021)
Article
Crystallography
Sylvain Le Tonquesse, Yoshitaka Matsushita, Priyanka Jood, Michihiro Ohta, Takao Mori, David Berthebaud
Summary: Metallization of undoped CrSi2 with Ti and Nb was explored in this study, with Ti showing strong adhesion and negligible electrical contact resistance, while Nb resulted in cracks and Si diffusion. The research aims to initiate the development of more reliable and efficient CrSi2 thermoelectric legs with an optimized design.
Article
Physics, Applied
Raju Chetty, Priyanka Jood, Masayuki Murata, Koichiro Suekuni, Michihiro Ohta
Summary: This study demonstrates the thermoelectric power generation capability of a prototype pi-shaped module composed of p-type colusite and n-type nanostructured PbTe, and evaluates the thermoelectric performance of the materials. The optimal working temperature and thermoelectric conversion efficiency for Cu26Cr2Ge6S32 and Pb0.98Ga0.02Te-3% GeTe are determined.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Shinichi Fujimoto, Kazuo Nagase, Hironori Ohshima, Masayuki Murata, Atsushi Yamamoto, Chul Ho Lee
Summary: Thermoelectric power generation is a promising technology for converting waste heat into electrical energy. Researchers have successfully developed a thermoelectric module without electrodes, which demonstrates stable power generation performance and high conversion efficiency.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Shota Hirayama, Koichiro Suekuni, Philipp Sauerschnig, Michihiro Ohta, Michitaka Ohtaki
Summary: In this study, the thermoelectric properties of Cu-S-based semiconducting compound and its hole-doped derivatives were synthesized and tested. Hole-carrier doping effectively reduced electrical resistivity and improved power factor. The Ti-doped compound showed better thermoelectric performance due to its low lattice thermal conductivity and improved power factor.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Review
Chemistry, Multidisciplinary
Philipp Sauerschnig, Priyanka Jood, Michihiro Ohta
Summary: For decades, efforts have been made to improve the thermoelectric figure of merit zT of lead telluride (PbTe)-based materials. However, their applications have been limited to space probes and remote locations. One of the obstacles in implementing thermoelectrics is establishing stable electrical and thermal contacts between PbTe-based materials and electrodes. This review summarizes the challenges and recent progress in bonding PbTe and contact layer, focusing on contact resistance, chemical stability, and mechanical stability.
Article
Materials Science, Multidisciplinary
Philipp Sauerschnig, Priyanka Jood, Michihiro Ohta
Summary: By adjusting the Na doping content, the material stability and mechanical properties of nanostructured p-type Pb0.993-xNaxGe0.007Te are improved while maintaining a high thermoelectric figure of merit zT. The presence of detrimental Na-rich impurity phases is eliminated by reducing the Na doping from 4% to 2%. Co80Fe20 contact layers improve the conversion efficiency of Pb0.973Na0.02Ge0.007Te and Pb0.98Ga0.02Te.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Thermodynamics
Minhyeok Lee, Gyeonghun Yoo, Junjie Peng, Shintaro Uchida, Atsushi Yamamoto, Yuji Suzuki
Summary: A novel micro thermoelectric power generation module has been proposed, which directly heats the hot junction of high-temperature plate-type TEG elements through localized catalytic combustion. The convection effect with unburned mixture flows is utilized to recover heat losses caused by heat conduction. The study shows that with the aid of the convection effect, temperature differences over 700 degrees C can be achieved between the hot/cold junctions while maintaining a low unreacted fuel concentration.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Physical
Takashi Hagiwara, Koichiro Suekuni, Pierric Lemoine, Carmelo Prestipino, Erik Elkaim, Andrew R. Supka, Rabih Al Rahal Al Orabi, Marco Fornari, Emmanuel Guilmeau, Bernard Raveau, Hikaru Saito, Philipp Sauerschnig, Michihiro Ohta, Yui Kanemori, Michitaka Ohtaki
Summary: Copper-based sulfide Cu(3)0Ti(6)Sb(2)S(32) with a colusite-like cubic structure is synthesized and characterized in this study. The electronic structure and vibrational properties are investigated using experiments and first-principles calculations. The design approach based on the pseudobinary composition is demonstrated to be a promising direction for the discovery of new copper-based sulfides with tunable transport properties.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Sylvain Le Tonquesse, Hugo Bouteiller, Yoshitaka Matsushita, Araseli Cortez, Sabah K. Bux, Kazuki Imasato, Michihiro Ohta, Jean-Francois Halet, Takao Mori, Franck Gascoin, David Berthebaud
Summary: This article introduces a high-temperature thermoelectric material Yb4Sb3 and its application in the fabrication of high-temperature thermoelectric modules. It is found that the doping strategy can improve the figure-of-merit of the thermoelectric material through the study of doubly doped CexYb4-xBi0.2Sb2.8 compounds. Furthermore, the study of metallic contact screening for the thermoelectric module successfully produced stable contacts for the thermoelectric legs.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Kazuki Imasato, Philipp Sauerschnig, Shashwat Anand, Takao Ishida, Atsushi Yamamoto, Michihiro Ohta
Summary: In this study, triple half-Heusler compound Mg2VNi3Sb3 with unconventional valence balance strategy was successfully synthesized. It exhibits semiconductor behavior with a small bandgap and low lattice thermal conductivity. This research demonstrates a new strategy for further improvement of thermoelectric performance and extended tunability of intermetallic compounds.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Daisuke Ohori, Masayuki Murata, Atsushi Yamamoto, Kazuhiko Endo, Min-Hui Chuang, Ming-Yi Lee, Yiming Li, Jenn-Hwan Tarng, Yao-Jen Lee, Seiji Samukawa
Summary: The research team demonstrated a thermally managed Si nanopillar/SiGe composite structure, achieving a 1/100 times lower thermal conductivity compared to Si bulk through phonon transport control. Thermal conductivity measurements showed that the nanopillar structure could eliminate electron-phonon scattering, offering a promising solution for advanced CMOS technologies.
2021 IEEE 21ST INTERNATIONAL CONFERENCE ON NANOTECHNOLOGY (IEEE NANO 2021)
(2021)
