High-performance flexible Bi2Te3 films based wearable thermoelectric generator for energy harvesting

Kong, Deyue; Zhu, Wei; Guo, Zhanpeng; Deng, Yuan

doi:10.1016/j.energy.2019.03.060

Cited by 120 publications

(65 citation statements)

References 41 publications

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“…It has been also observed that bismuth chalcogenide based TIs are very stable even at ambient conditions 36 and show robust nature of Dirac fermions even at room temperature 37 . The unique Bi 2 Te 3 - single walled nanotube networks 38 , 39 and thin films of Bi 2 Te 3 on flexible polyimide substrates 40 were used to make high performing flexible thermoelectric generators for energy harvesting applications. Previously thin films of TIs made from the nanosheets of Bi 2 Se 3 and Bi 2 Te 3 were integrated with the plastic substrates using colloidal nanoplates ink for investigating the optoelectronic properties 41 but films were not studied for their NIR photodetector performances e.g.…”

Section: Introductionmentioning

confidence: 99%

High performing flexible optoelectronic devices using thin films of topological insulator

Pandey

Yadav

Kaur

et al. 2021

Sci Rep

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Topological insulators (TIs) possess exciting nonlinear optical properties due to presence of metallic surface states with the Dirac fermions and are predicted as a promising material for broadspectral phodotection ranging from UV (ultraviolet) to deep IR (infrared) or terahertz range. The recent experimental reports demonstrating nonlinear optical properties are mostly carried out on non-flexible substrates and there is a huge demand for the fabrication of high performing flexible optoelectronic devices using new exotic materials due to their potential applications in wearable devices, communications, sensors, imaging etc. Here first time we integrate the thin films of TIs (Bi2Te3) with the flexible PET (polyethylene terephthalate) substrate and report the strong light absorption properties in these devices. Owing to small band gap material, evolving bulk and gapless surface state conduction, we observe high responsivity and detectivity at NIR (near infrared) wavelengths (39 A/W, 6.1 × 108 Jones for 1064 nm and 58 A/W, 6.1 × 108 Jones for 1550 nm). TIs based flexible devices show that photocurrent is linearly dependent on the incident laser power and applied bias voltage. Devices also show very fast response and decay times. Thus we believe that the superior optoelectronic properties reported here pave the way for making TIs based flexible optoelectronic devices.

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Section: Introductionmentioning

confidence: 99%

High performing flexible optoelectronic devices using thin films of topological insulator

Pandey

Yadav

Kaur

et al. 2021

Sci Rep

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“…A majority of the flexible TEGs reported to date rely on the deposition of thermoelectric materials on flexible substrates such as fabrics, [170][171][172][173][174] PDMS, [175][176][177][178][179] polyethylene terephthalate (PET), [180][181][182][183] and polyimide (PI). [184][185][186][187][188][189][190] Different organic thermoelectric materials were also reported, which show promising results. [191][192][193] Finally, several groups used integrated rigid thermoelectric legs in a flexible platform to create flexible devices.…”

Section: Design Approachesmentioning

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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“…Many works have been reported on cross-plane bismuth telluride based thin film through electrodeposition [27], screen printing [28], brush-painting [29,30] and inkjet printing [31]. In comparison, an in-plane TEG structure is mechanically stronger and more flexible and conformable over a hot surface [32][33][34][35].…”

Section: Toc Graphics Introductionmentioning

confidence: 99%

Wearable and flexible thin film thermoelectric module for multi-scale energy harvesting

Karthikeyan

Surjadi

Wong

et al. 2020

Journal of Power Sources

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Developing a thermoelectric generator(TEG) with shape conformable geometry for sustaining low-thermal impedance and large temperature gradient (∆ ) is fundamental for wearable and multi-scale energy harvesting applications. Here we demonstrate a flexible architectural design, with efficient thin film thermoelectric generator as a solution for this problem. This approach not only decreases the thermal impedance but also multiplies the temperature gradient, thereby increasing the power conversion efficiency (PCE) as comparable to bulk TEG. Intact thin films of Tin telluride (p-type) and Lead Telluride (n-type) are deposited on flexible substrate through physical vapor deposition and a thermoelectric module possessing a maximum output power density of 8.4mW/cm 2 is fabricated. We have demonstrated the performance of p-SnTe/n-PbTe based TEG as a flexible wearable power source for electronic gadgets, as a thermal touch sensor for real-time switching and temperature monitoring for exoskeleton applications.

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High-performance flexible Bi2Te3 films based wearable thermoelectric generator for energy harvesting

Cited by 120 publications

References 41 publications

High performing flexible optoelectronic devices using thin films of topological insulator

High performing flexible optoelectronic devices using thin films of topological insulator

Energy Harvesting and Storage with Soft and Stretchable Materials

Wearable and flexible thin film thermoelectric module for multi-scale energy harvesting

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