Numerical modeling of the performance of thermoelectric module with polydimethylsiloxane encapsulation

Shi, Yaoguang; Wang, Yancheng; Mei, Deqing; Chen, Zichen

doi:10.1002/er.3928

Cited by 24 publications

(15 citation statements)

References 26 publications

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“…The PDMS has been widely used in encapsulation processes for electronic devices owing to its excellent optical, mechanical, chemical, and biological properties. [ 42–44 ] Figure a presents the photograph (top) and exploded view illustration (bottom) of the PDMS encapsulated UVA sensor based on pRGO paper. Further detailed fabrication processes are detailed in the Experimental Section and the Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

A Wearable Patch Based on Flexible Porous Reduced Graphene Oxide Paper Sensor for Real‐Time and Continuous Ultraviolet Radiation Monitoring

Lee

Hong

Yang

et al. 2021

Adv Materials Technologies

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Real‐time and continuous monitoring of ultraviolet (UV) radiation in daily activity is critical in diverse fields ranging from personal fitness, cosmetics, to medical aspects. Here, a wearable UV monitoring patch that can be easily fixed/removed at desired locations and provide real‐time and continuous UVA levels in daily life is developed. The wearable patch consists of a highly sensitive, flexible graphene sensor for UVA measurement and a multifunctional fabric patch integrated with commercial electronic components for signal processing, wireless transmission. To achieve a high sensitive UVA sensor with high flexibility and long‐term stability, porous reduced graphene oxide (pRGO) papers are fabricated by simple solvent evaporation followed by thermochemical reduction. The flexible UVA sensors based on pRGO papers feature a high UVA photoresponsivity of 125 mA W−1, which is comparable to that of a commercial silicon‐based UV sensor. Furthermore, the polydimethylsiloxane‐encapsulated pRGO (PDMS‐pRGO) sensors exhibit stable UVA photoresponse characteristics that is maintained under severe conditions, such as a large number of bending cycles, thermal heating, and high humidity. The use of wearable patches that enable real‐time, wireless monitoring of personal UVA levels in various practical applications are demonstrated.

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Section: Resultsmentioning

confidence: 99%

A Wearable Patch Based on Flexible Porous Reduced Graphene Oxide Paper Sensor for Real‐Time and Continuous Ultraviolet Radiation Monitoring

Lee

Hong

Yang

et al. 2021

Adv Materials Technologies

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“…[191][192][193] Finally, several groups used integrated rigid thermoelectric legs in a flexible platform to create flexible devices. [176,[194][195][196][197][198][199][200][201][202][203] Flexible TEGs relying on the deposition of thin-film materials on flexible substrates are not stretchable since the deposited materials are rigid in nature, but can be flexible if they are thin enough. Additionally, in most cases, the temperature difference across the thin-film thermoelectric materials is small (if the heat flows through the thickness of the material), which results in low open-circuit voltage.…”

Section: Design Approachesmentioning

confidence: 99%

“…Since then, several studies reported various flexible TEGs incorporating rigid thermoelectric blocks. [176,[194][195][196][197][198][199][200][201][202][203] Such blocks can be interconnected using thin Cu traces. [200] Importantly, the space between the thermoelectric blocks should be electrically and thermally insulating; the latter helps to force heat to travel through the thermoelectric materials.…”

Section: Flexible Tegs Using Rigid Bulk Materialsmentioning

confidence: 99%

Energy Harvesting and Storage with Soft and Stretchable Materials

et al. 2021

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Soft robotics can interact with humans safely. 3) Devices built from stretchable materials have a greater mechanical degree of freedom. This allows electronics, displays, and sensors to be integrated into places that would be difficult or impossible with rigid devices and enables new types of human-computer interfaces. It also allows robotics to have enhanced levels of dexterity and complexity in movement (consider the octopus as an inspiring example). 4) Devices that can be deformed elastically can be engineered to have new or emerging properties, such as antennas that change frequency with elongation, [21] intelligent materials that can perform unconventional forms of logic, [22,23] or composites that change thermal conductivity, [24] electrical conductivity, [25] or dielectric properties with deformation. [26][27][28] Most robotic and electronic devices require electricity to function, as shown on the left side of Figure 1A. Electricity can power sensors, enable computation, drive locomotion, and transmit information. Although most devices use electricity from an outlet, such "tethered" devices create notable limitations. In addition to limiting the degree of freedom of robotic materials, plug-in devices must be within a chords-length of a functioning outlet, thereby confining the range of use of such devices. Although battery operated devices can operate for some time without being plugged-in, the need to do so periodically is at best a nuisance that limits the operating time of a device. At worst, it can lead to issues such as lack of compliance with wearable devices (that is, the device is taken off for charging and never put back on) or disruptions in operation (a particular problem for health care devices or remotely deployed devices). Thus, there is a compelling interest in harvesting energy from the ambient to create tetherless devices or even devices that need less charging. Figure 1A (right side) provides examples of applications that may benefit from harvesting, such as internetof-things (IOT) devices, soft robots, wearables, implantables, and deployables (that is, devices sent to remote locations that do not have electrical outlets). Energy Harvesting CategoriesStrategies to harness energy typically convert waste or otherwise unused energy from the ambient into electricity. Although This review highlights various modes of converting ambient sources of energy into electricity using soft and stretchable materials. These mechanical properties are useful for emerging classes of stretchable electronics, e-skins, bio-integrated wearables, and soft robotics. The ability to harness energy from the environment allows these types of devices to be tetherless, thereby leading to a greater range of motion (in the case of robotics), better compliance (in the case of wearables and e-skins), and increased application space (in the case of electronics). A variety of energy sources are available including mechanical (vibrations, human motion, wind/fluid motion), electromagnetic (radio frequency (RF), solar), and ther...

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“…PDMS is a silicon-based organic polymer that behaves as an inert, non-toxic, non-flammable, optically transparent elastomer with low thermal conductivity [39,40]. The thickness, shape, or size of the PDMS layer can be easily controlled.…”

Section: Te Fiber Sensorsmentioning

confidence: 99%

A Self-Powered Flexible Thermoelectric Sensor and Its Application on the Basis of the Hollow PEDOT:PSS Fiber

et al. 2020

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The thermoelectric (TE) fiber, based on poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), which possesses good flexibility, a low cost, good environmental stability and non-toxicity, has attracted more attention due to its promising applications in energy harvesting. This study presents a self-powered flexible sensor based on the TE properties of the hollow PEDOT:PSS fiber. The hollow structure of the fiber was synthesized using traditional wet spinning. The sensor was applied to an application for finger touch, and showed both long-term stability and good reliability towards external force. The sensor had a high scalability and was simple to develop. When figures touched the sensors, a temperature difference of 6 °C was formed between the figure and the outside environment. The summit output voltages of the sensors with 1 to 5 legs gradually increased from 90.8 μV to 404 μV. The time needed for the output voltage to reach 90% of its peak value is only 2.7 s. Five sensors of legs ranging from 1 to 5 were used to assemble the selector. This study may provide a new proposal to produce a self-powered, long-term and stable skin sensor, which is suitable for wearable devices in personal electronic fields.

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Numerical modeling of the performance of thermoelectric module with polydimethylsiloxane encapsulation

Cited by 24 publications

References 26 publications

A Wearable Patch Based on Flexible Porous Reduced Graphene Oxide Paper Sensor for Real‐Time and Continuous Ultraviolet Radiation Monitoring

A Wearable Patch Based on Flexible Porous Reduced Graphene Oxide Paper Sensor for Real‐Time and Continuous Ultraviolet Radiation Monitoring

Energy Harvesting and Storage with Soft and Stretchable Materials

A Self-Powered Flexible Thermoelectric Sensor and Its Application on the Basis of the Hollow PEDOT:PSS Fiber

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