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Artículos de revistas sobre el tema "Photo-thermoelectric generators"

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Publicado: 25 de mayo de 2024

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1

Tasaki, Satoko y Soshu Kirihara. "Zinc Oxide Modeling to Create Semiconductor Dendrites by Using Micro Stereolithography". Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2011, CICMT (1 de septiembre de 2011): 000193–98. http://dx.doi.org/10.4071/cicmt-2011-wa24.

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Zinc oxide ceramics exhibit various semiconductor properties through optimized elements or materials doping. The elements doping of aluminum or gallium can control the electric conductivity, and composites doping of indium and rare earth such as yttrium can increase the thermoelectric conversion efficiency. In this investigation, dendritic lattice structures of the zinc oxide semiconductors with periodically ordered arrangements or self similar patterns were fabricated successfully to increase the surfaces area and porosity values by using micro patterning stereolithography of a computer aided design and manufacturing. These semiconductor dendrites with penetrable paths and extensive interfaces will be used for fluid and heat flow receptors and applied to the novel sensor devices and energy generators. The dendritic lattice models sliced into a series of cross sectional patterns with uniform thickness by using a stereolithographic file format convertor. These numerical data were transferred into the micro processing equipment. High viscosity slurry material was prepared through the mixing of photo sensitive acrylic resin and the zinc oxide particle at 30 % in volume fraction. The slurry was supplied on a flat substrate with 8 μm in layer thickness by using a mechanical knife edge. The cross sectional image was exposed on the slurry surface by using digital micro mirror devices. Through the layer by layer processes, the solid component was obtained with micrometer order part accuracies. The dense ceramic sample was purchase after de-waxing and sintering process.
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2

Kurosawa, Masashi, Shigehisa Shibayama, Mitsuo Sakashita y Osamu Nakatsuka. "(Invited) Epitaxial Growth Technique for Si1−X Sn x Binary Alloy Thin Films". ECS Meeting Abstracts MA2023-02, n.º 30 (22 de diciembre de 2023): 1534. http://dx.doi.org/10.1149/ma2023-02301534mtgabs.

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Silicon tin (Si1−x Sn x ) binary alloys are attractive materials for next-generation Si-based photonics and thermoelectronics. The energy band calculations predicted that the conduction band at the Γ point is more rapidly decreased than the others by the Sn substitution, and direct band gap semiconductors can be realized at more than sufficient Sn content [1], although they varied from 25 to 90% by the calculation methods. The corresponding wavelength range will be matched to the optical communication band, suggesting Si1−x Sn x can be applied to near-infrared light source and detector. Another interest is the dramatic reduction of the thermal conductivity by the Sn substitution owing to the mass-difference phonon scattering. Theoretically [2], the thermal conductivity of bulk Si (145 Wm−1K−1 [3]) can be decreased to ~5 Wm−1K−1 by the 10% Sn substitution; the lowest thermal conductivity (3 Wm−1K−1) is obtained at 50% Sn, which is the lowest value among bulk group-IV alloys. The low thermal conductivity achieves high thermoelectric performance and can help to ensure temperature differences within small thermoelectric generators (TEGs) integrated on Si chips, as is the case of Si nanowire TEGs [4]. In contrast to the theoretical studies mentioned above, experimental studies are very limited compared with other group-IV alloys such as silicon germanium and germanium tin. Difficulties of the Si1−x Sn x synthesizing are the extremely low solid solubility of Sn in Si (0.1%), a tenth of that in Ge, and the large (∼20%) mismatch between the Si and α-Sn lattices. Nevertheless, some research groups, including us, showed some possibilities to achieve a high Sn content Si1−x Sn x thin films (x>10%) experimentally; reported the optical properties such as photoluminescence and photo-absorption. However, the technology for freely controlling Sn content is still in its infancy; the Si1−x Sn x ’s thermoelectric properties have not been clarified yet. We will discuss the recent progress on the growth techniques of Si1−x Sn x thin films using solid phase epitaxy/crystallization [5-7], molecular beam epitaxy [8,9], sputtering [10], and the potential in thin-film TEGs application. Acknowledgments This work was partly supported by JSPS KAKENHI (Nos. 19K21971, 20H05188, and 21H01366), PRESTO (No. JPMJPR15R2), and CREST (No. JPMJCR19Q5) from JST, the TEPCO Memorial Foundation, and the Naito Research Grant. References [1] R. A. Soref and C. H. Perry, J. Appl. Phys. 69, 539 (1991). [2] S. N. Khatami and Z. Aksamiji, Phys. Rev. Appl. 6, 014015 (2016). [3] P. D. Maycock, Solid-State Electron. 10, 161 (1967). [4] T. Watanabe et al., 2017 IEEE Electron Devices Technology and Manufacturing Conference, Toyama, Japan, 2017, pp. 86-87. [5] M. Kurosawa et al., Appl. Phys. Lett. 106, 171908 (2015). [6] M. Kurosawa et al., Appl. Phys. Lett. 111, 192106 (2017). [7] M. Kurosawa et al., Jpn. J. Appl. Phys. 58, SAAD02 (2019). [8] R. Yokogawa et al., ECS Trans. 98, 291 (2020). [9] K. Fujimoto et al., Appl. Phys. Express 16, 045501 (2023). [10] T. Oiwa et al., Extended Abstracts of the 2022 International Conference on Solid State Devices and Materials, Makuhari, Japan, 2022, pp. 95-96.
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3

Qian, Yongqiang, Peidi Zhou, Yi Wang, Ying Zheng, Zhiling Luo y Luzhuo Chen. "A PEDOT:PSS/MXene-based actuator with self-powered sensing function by incorporating a photo-thermoelectric generator". RSC Advances 13, n.º 46 (2023): 32722–33. http://dx.doi.org/10.1039/d3ra06290b.

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4

Chang, Ho, Mu-Jung Kao, Kouhsiu David Huang, Sih-Li Chen y Zhi-Rong Yu. "A Novel Photo-Thermoelectric Generator Integrating Dye-sensitized Solar Cells with Thermoelectric Modules". Japanese Journal of Applied Physics 49, n.º 6 (21 de junio de 2010): 06GG08. http://dx.doi.org/10.1143/jjap.49.06gg08.

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5

Cao, Chongyang, Shuai Chen, Jiawen Liang, Tingting Li, Zhanlin Yan, Bing Zhang y Naichao Chen. "A high-efficient photo-thermoelectric coupling generator of cuprous iodide". AIP Advances 12, n.º 11 (1 de noviembre de 2022): 115125. http://dx.doi.org/10.1063/5.0112502.

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Thermoelectric (TE) energy converters have attracted great interest due to their maintenance-free, long-life, and high-reliability properties. However, improving the output power of TE devices remains a huge challenge. In this work, a high-efficient photo-TE coupling generator based on cuprous iodide (CuI) film is proposed to increase the output power of TE devices. Here, CuI film was prepared by the successive ionic layer adsorption and reaction method. The influence of the photovoltaic (PV) effect on the TE output voltage of CuI film was investigated by an analysis of the experimental results. The results showed that the output voltage of the photo-TE coupling generator had a maximum increment of 83.47% at 343 K compared to the sum of TE and PV voltages. The increase in the output voltage was mainly because of the PV effect rather than the TE effect, while the photo-generated electrons also induce a considerable change in the TE figure of merit. Hence, the strategy proposed in this work might be a potential approach to further improve the output performance of other TE materials.
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6

Tanabe, Shunsuke y Toru Tanzawa. "Battery-Assisted Battery Charger with Maximum Power Point Tracking for Thermoelectric Generator: Concept and Experimental Proof". Electronics 12, n.º 19 (30 de septiembre de 2023): 4102. http://dx.doi.org/10.3390/electronics12194102.

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This paper proposes a concept of battery-assisted battery charger with maximum power point tracking for DC energy transducer such as thermoelectric generator and photo voltaic generator, and shows experimental results to prove the concept. The DC energy transducer is connected in series with a battery to increase the voltage. The plus terminal for the DC energy transducer is connected with the input terminal of a DC-DC buck converter, whereas the battery is connected with the output terminal of the converter. Thus, the current is boosted from the input to the output. When the net current to the battery is positive, the system works as a battery charger. To extract the as much power from the DC energy transducer as possible for high charging efficiency, maximum power point tracking is introduced. The converter was designed in 180 nm 3V CMOS with a silicon area of 1.05 mm2. The concept was experimentally proven by varying the reference voltages to control the input voltage. An all-solid-state battery was charged up from 2.2 V to 2.3 V in two hours by the converter with a flexible thermoelectric generator which had an open-circuit voltage of 0.6 V.
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7

Wen, Dan-Liang, Xin Liu, Jing-Fu Bao, Guo-Ke Li, Tao Feng, Fan Zhang, Dun Liu y Xiao-Sheng Zhang. "Flexible Hybrid Photo-Thermoelectric Generator Based on Single Thermoelectric Effect for Simultaneously Harvesting Thermal and Radiation Energies". ACS Applied Materials & Interfaces 13, n.º 18 (4 de mayo de 2021): 21401–10. http://dx.doi.org/10.1021/acsami.1c03622.

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8

Guo, Zhanpeng, Wei Zhu, Yuedong Yu y Yuan Deng. "Photo-Thermoelectric Thin-Film Generator and Sensor With Ultrahigh Output Voltage and Large Responsivity". IEEE Electron Device Letters 40, n.º 11 (noviembre de 2019): 1832–35. http://dx.doi.org/10.1109/led.2019.2942039.

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9

Lei, Yiming, Zewei Jia, Huilin Hu, Lequan Liu, Jinhua Ye y Defa Wang. "Enhanced CO2 Photoreduction over Bi2Te3/TiO2 Nanocomposite via a Seebeck Effect". Catalysts 12, n.º 11 (27 de octubre de 2022): 1323. http://dx.doi.org/10.3390/catal12111323.

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The activation of carbon dioxide (CO2) molecules and separation/transfer of photoinduced charge carriers are two crucial factors influencing the efficiency of CO2 photoreduction. Herein, we report a p-type Bi2Te3/commercial TiO2 (pBT/P25) nanocomposite for enhanced CO2 photoreduction. Upon light irradiation, a temperature gradient formed in pBT induces the Seebeck effect to build a thermoelectric field, which promotes the charge carriers’ separation/transfer. Additionally, pBT with a strong light absorption capacity generates the photothermal effect favoring the activation of CO2 molecules. In addition, the excellent electric conductivity and large work function render pBT an efficient cocatalyst for further improving the charge carriers’ separation/transfer. Owing to the synergistic enhancement effect of pBT on the activation of CO2 molecules and promotion of charge separation/transfer, we achieved the highest CO evolution rate over pBT(2)/P25 of 19.2 μmol·gcat−1·h−1, which was approximately 5.5 times that of bare P25. This work suggests that a thermoelectric material/semiconductor nanocomposite could be developed as an efficient photo-thermo-electro-chemical conversion system for enhanced CO2 reduction via promoting the charge carriers’ separation/transfer.
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10

Zhang, Xiaofei, Wenqiang Gao, Xiaowen Su, Fulei Wang, Baishan Liu, Jian-Jun Wang, Hong Liu y Yuanhua Sang. "Conversion of solar power to chemical energy based on carbon nanoparticle modified photo-thermoelectric generator and electrochemical water splitting system". Nano Energy 48 (junio de 2018): 481–88. http://dx.doi.org/10.1016/j.nanoen.2018.03.055.

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11

Kılkış, Birol, Malik Çağlar y Mert Şengül. "Energy Benefits of Heat Pipe Technology for Achieving 100% Renewable Heating and Cooling for Fifth-Generation, Low-Temperature District Heating Systems". Energies 14, n.º 17 (30 de agosto de 2021): 5398. http://dx.doi.org/10.3390/en14175398.

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This paper addresses the challenges the policymakers face concerning the EU decarbonization and total electrification roadmaps towards the Paris Agreement set forth to solve the global warming problem within the framework of a 100% renewable heating and cooling target. A new holistic model was developed based on the Rational Exergy Management Model (REMM). This model optimally solves the energy and exergy conflicts between the benefits of using widely available, low-temperature, low-exergy waste and renewable energy sources, like solar energy, and the inability of existing heating equipment, which requires higher exergy to cope with such low temperatures. In recognition of the challenges of retrofitting existing buildings in the EU stock, most of which are more than fifty years old, this study has developed a multi-pronged solution set. The first prong is the development of heating and cooling equipment with heat pipes that may be customized for supply temperatures as low as 35 °C in heating and as high as 17 °C in cooling, by which equipment oversizing is kept minimal, compared to standard equipment like conventional radiators or fan coils. It is shown that circulating pump capacity requirements are also minimized, leading to an overall reduction of CO2 emissions responsibility in terms of both direct, avoidable, and embodied terms. In this respect, a new heat pipe radiator prototype is presented, performance analyses are given, and the results are compared with a standard radiator. Comparative results show that such a new heat pipe radiator may be less than half of the weight of the conventional radiator, which needs to be oversized three times more to operate at 35 °C below the rated capacity. The application of heat pipes in renewable energy systems with the highest energy efficiency and exergy rationality establishes the second prong of the paper. A next-generation solar photo-voltaic-thermal (PVT) panel design is aimed to maximize the solar exergy utilization and minimize the exergy destruction taking place between the heating equipment. This solar panel design has an optimum power to heat ratio at low temperatures, perfectly fitting the heat pipe radiator demand. This design eliminates the onboard circulation pump, includes a phase-changing material (PCM) layer and thermoelectric generator (TEG) units for additional power generation, all sandwiched in a single panel. As a third prong, the paper introduces an optimum district sizing algorithm for minimum CO2 emissions responsibility for low-temperature heating systems by minimizing the exergy destructions. A solar prosumer house example is given addressing the three prongs with a heat pipe radiator system, next-generation solar PVT panels on the roof, and heat piped on-site thermal energy storage (TES). Results showed that total CO2 emissions responsibility is reduced by 96.8%. The results are discussed, aiming at recommendations, especially directed to policymakers, to satisfy the Paris Agreement.
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12

Zhou, Yi-Cun, Jie Yang, Lu Bai, Rui-Ying Bao, Ming-Bo Yang y Wei Yang. "Super-flexible phase change materials with a dual-supporting effect for solar thermoelectric conversion in ocean environment". Journal of Materials Chemistry A, 2022. http://dx.doi.org/10.1039/d2ta07885f.

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Solar thermoelectric generators (STEGs) based on phase change materials (PCMs) are an emerging advanced technology to collect and utilize solar energy. However, it is still challenging for photo-driven PCMs to...
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13

Ma, Xiaolu, Jin Zhao, Dahua Shou y Yong Liu. "A Highly‐Flexible and Breathable Photo‐Thermo‐Electric Membrane for Energy Harvesting". Advanced Energy Materials, 3 de marzo de 2024. http://dx.doi.org/10.1002/aenm.202304032.

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AbstractPhoto‐thermo‐electric (PTE) technology is a simple but sustainable method that directly converts solar energy into electricity. However, the manufacturing of flexible and breathable PTE generators for practical applications, such as intelligent wearable and self‐powered sensors, poses significant challenges due to the rigid thermoelectric materials and unbreathable substrates. Here, a highly‐flexible and breathable photo‐thermal‐electric membrane (FB‐PTEM) is developed by magnetron sputtering (MS) on a photo‐thermal nanofiber membrane. A single unit of FB‐PTEM produced an open‐circuit voltage of 0.52 V under 1 sun (100 mW cm−2) and 0.2 V under LED illumination, making it suitable for all‐weather use. The photo‐thermal nanofiber membrane exhibited high photo‐thermal conversion capacity of reaching 70 °C within 50 s under 1 sun irradiation. The FB‐PTEM with a thickness of 0.35 mm achieved a self‐temperature difference of 20.6 °C under 1 sun with the low thermal conductivity of the nanofiber membrane. Furthermore, it has a vapor permeability of 14.6 kg m−2 d−1 due to the inherent high porosity of the nanofiber membranes. The FB‐PTEM demonstrates great potential for the development of highly flexible thermoelectric materials, as it encompasses various advantageous features such as self‐temperature difference, lightweight design, high breathability, and all‐weather suitability.
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14

Yang, Zhen-yu, Xin-zheng Jin, Shang-yu Chen, Yan-zhou Lei y Yong Wang. "Designing Poly(3,4-ethylenedioxythiophene) Polystyrene Sulfonate/Graphene Oxide/Graphene Nanosheet/Polyethylene Glycol Phase-Change Composites with Superior Thermal Management for Photo-thermoelectric Generators". ACS Applied Materials & Interfaces, 28 de septiembre de 2023. http://dx.doi.org/10.1021/acsami.3c11161.

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15

Yang, Zhen-yu, Xin-zheng Jin, Chen-hui Huang, Yan-zhou Lei y Yong Wang. "Constructing A/B-Side Heterogeneous Asynchronous Structure with Ag2Se Layers and Bushy-like PPy toward High-Performance Flexible Photo-Thermoelectric Generators". ACS Applied Materials & Interfaces, 14 de julio de 2022. http://dx.doi.org/10.1021/acsami.2c09009.

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16

Tao, Junyang, Naila Arshad, Ghazala Maqsood, Muhammad Sohail Asghar, Fengshuai Zhu, Liangyou Lin, Muhammad Sultan Irshad y Xianbao Wang. "The Quest for Two‐Dimensional MBenes: From Structural Evolution to Solar‐Driven Hybrid Systems for Water‐Fuel‐Energy Generation and Phototherapy". Small, 15 de mayo de 2024. http://dx.doi.org/10.1002/smll.202401603.

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AbstractThe field of 2D materials has advanced significantly with the emergence of MBenes, a new material derived from the MAX phases family, a novel class of materials that originates from the MAX phases family. Herein, this article explores the unique characteristics and morphological variations of MBenes, offering a comprehensive overview of their structural evolution. First, the discussion explores the evolutionary period of 2D MBenes associated with the several techniques for synthesizing, modifying, and characterizing MBenes to tailor their structure and enhance their functionality. The focus then shifts to the defect chemistry of MBenes, electronic, catalytic, and photothermal properties which play a crucial role in designing multifunctional solar‐driven hybrid systems. Second, the recent advancements and potentials of 2D MBenes in solar‐driven hybrid systems e.g. photo‐electro catalysis, hybrid solar evaporators for freshwater and thermoelectric generators, and phototherapy, emphasizing their crucial significance in tackling energy and environmental issues, are explored. The study further explores the fundamental principles that regulate the improved photocatalytic and photothermal characteristics of MBenes, highlighting their promise for effective utilization of solar energy and remediation of the environment. The study also thoroughly assesses MBenes' scalability, stability, and cost effectiveness in solar‐driven systems. Current insights and future directions allow researchers to utilize MBenes for sustainable and varied applications. This review regarding MBenes will be valuable to early researchers intrigued with synthesizing and utilizing 2D materials for solar‐powered water‐energy‐fuel and phototherapy systems.
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17

TRUNOV, STANISLAV, ALEKSEY KHIMENKO, SERGEY RASTIMESHIN y ALEKSEY KUZMICHEV. "SOLAR THERMAL ELECTRIC GENERATOR FOR AGRICULTURE". Elektrotekhnologii i elektrooborudovanie v APK 1, n.º 46 (2022). http://dx.doi.org/10.22314/2658-4859-2022-69-1-84-88.

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Solar cells convert solar electromagnetic energy into electrical energy. When fully illuminated, one element generates electricity with a voltage of 0.5 volts. For practical use in generating electricity, solar cells are combined into a photo panel. (Research purpose) The research purpose is in developing a functional and technological scheme of a solar thermal electric generator for power supply to remote agricultural facilities using renewable solar energy. (Materials and methods) During the research there were used method of patent search on the websites of the Eurasian Patent Organization, the World Intellectual Property Organization (WIPO), Rospatent and Google Patents. The article presents the thermoelectric generator assembly based on Peltier thermoelectric modules and a solar concentrator for generating electricity. (Results and discussion) The article presents the functional and technological scheme of a heliothermoelectric power generator for agricultural power supply using renewable solar energy. The use of thermoelectric modules instead of photovoltaic panels was justified. Based on the dependence of the generated power on the temperatures of the hot and cold circuits of the thermoelectric module, there was chosen the generator type of the thermoelectric module. (Conclusions) The hybrid system with a solar concentrator and a thermoelectric generator can be considered as an alternative to a traditional electric thermal diesel generator power supply system, since thermoelectric modules have recently been increasingly recognized by specialists in various fields of technology. The specific power of 42 thermoelectric modules with the area of 0.23 square meters is 1173 watts, which exceeds the specific power generated by a single-crystal photovoltaic panel with the area of 1.62 square meters, producing 166 Watts per square meter, which makes thermoelectric modules competitive with photovoltaic panels.
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18

Nakayama, Ryosuke, Sohei Saito, Takuo Tanaka y Wakana Kubo. "Metasurface absorber enhanced thermoelectric conversion". Nanophotonics, 9 de febrero de 2024. http://dx.doi.org/10.1515/nanoph-2023-0653.

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Abstract Metasurfaces are artificial thin materials that achieve optical thickness through thin geometrical structure. This feature of metasurfaces results in unprecedented benefits for enhancing the performance of optoelectronic devices. In this study, we report that this metasurface feature is also essential to drive photo-thermoelectric conversion, which requires the accumulation of thermal energy and effective heat conduction. For example, a metasurface-attached thermoelectric device placed in an environment with uniform thermal radiation generates an output voltage by gathering the thermal energies existing in the environment and creating an additional thermal gradient across the thermoelectric element. In contrast, when a 100-μm-thick-carbon-black-coated electrode was used instead of the metasurface, the device showed lower thermoelectric performance than that of the metasurface-attached device although carbon black exhibits higher infrared absorption than the metasurface. These results indicate that metasurface characteristics of optical thickness and thin geometrical structure for achieving the high thermal conductance are essential in enhancing the performance of photo-thermoelectric devices in terms of the effective collection of thermal energies and conduction of local heating.
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19

Yang, Zhen-yu, Xin-zheng Jin, Wen-Yan Wang, Chen-hui Huang, Yan-Zhou Lei y Yong Wang. "High output characteristic Ag2Se/Nylon self-supporting composite films for wearable photo-thermoelectrical generators". Journal of Materials Chemistry A, 2022. http://dx.doi.org/10.1039/d2ta06064g.

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Recently, the skyrocketing interest in smart wearable devices has led to innovations in energy-harvesting materials. Flexible thermoelectric (TE) materials have thus developed rapidly, but in this process TE performances have...
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20

Zhou, Peidi, Jian Lin, Wei Zhang, Zhiling Luo y Luzhuo Chen. "Photo-thermoelectric generator integrated in graphene-based actuator for self-powered sensing function". Nano Research, 29 de agosto de 2021. http://dx.doi.org/10.1007/s12274-021-3791-3.

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21

Mohsen, Saeed. "Hybrid Energy Harvester for Medical Sensor Node toward Real-Time Healthcare Monitoring". Proceedings of Engineering and Technology Innovation, 8 de marzo de 2021. http://dx.doi.org/10.46604/peti.2021.7002.

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In healthcare applications, the remote monitoring for moving patients depends on medical sensor nodes, which should be mobile. Thus, the power mains of medical sensor nodes should be disconnected most of the time to monitor natural movements of patients. In this paper, a self-sustainable medical sensor node is proposed for healthcare monitoring applications. The node implementation consists of a microcontroller unit (MCU), a photo-plethysmography (PPG) sensor, a Bluetooth low energy (BLE) module, and a MPU module that includes a gyroscope with accelerometer. The power supply of the node is a hybrid energy harvester developed to provide a sustainable energy for the sensor node. The harvester is composed of a photovoltaic (PV) panel, a thermoelectric generator (TEG) module, a DC-DC converter, and a super-capacitor. Experimental results illustrate that the proposed node can monitor a physiological data on a mobile device using the BLE Terminal application.
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22

Zhang, Yiwei, Huizhen Liu, Xingfei Zhou, Ziyang Hu, Han Wang, Min Kuang, Jianming Li y Houcheng Zhang. "A novel photo-thermal-electric hybrid system comprising evacuated U-tube solar collector and inhomogeneous thermoelectric generator toward efficient and stable operation". Energy, febrero de 2024, 130616. http://dx.doi.org/10.1016/j.energy.2024.130616.

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