Solution-Processed Plasmonic–Dielectric Sunlight-Collecting Nanofilms for Solar Thermoelectric Application

Lee, Dong Hoon; Pyun, Seung Beom; Bae, Yuri; Kang, Dong Pil; Park, Jun Woo; Cho, Eun Chul

doi:10.1021/acsami.7b11446

Cited by 6 publications

(10 citation statements)

References 68 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[17,18] Since the electric potential difference (∆V) generated from a TE device is proportional to the temperature difference across the device (∆T) and the Seebeck coefficient (S), as expressed by ΔV = SΔT, 17,18 plasmonic NPs have been coated on the top surface of a TE module to generate heat upon solar illumination. [19][20][21][22][23] In this approach, the amount of absorbed solar radiation and the heat produced by plasmonic NPs are largely determined by the overlap between the spectrum of solar radiation and the extinction of the NPs. However, many plasmonic NPs have narrow extinction in the visible light region, particularly for spherical Ag and Au NPs, resulting in limited spectral overlap.…”

Section: Introductionmentioning

confidence: 99%

Porous Polydimethylsiloxane/Au Composites as Solar‐Light Absorbers for Light‐Driven Thermoelectric Applications

Lee

Biutty

Zakia

et al. 2021

Macro Materials & Eng

View full text Add to dashboard Cite

Solar thermoelectric (TE) generators may potentially provide a viable alternative to photovoltaic devices for producing electrical energy from renewable sources. In this approach, the conversion of solar radiation into heat is essential to enhance the performance of TE devices, which necessitates the development of efficient solar light absorbers. Metal nanoparticles (NPs) have gained much attention in this regard because they can convert light into heat via plasmon-mediated photothermal effects. In this study, porous nanocomposites comprising polydimethylsiloxane (PDMS) and Au NPs are prepared. In the PDMS/Au composites, the narrow extinction spectrum of Au NPs is extended over longer wavelengths by plasmonic hybridization to promote the light absorption property of the NPs. In addition, the porous structure induces strong scattering of incident light, which further enhances the absorption efficiency of the Au NPs. Consequently, the plasmon-mediated photothermal effects of Au NPs are noticeably enhanced and increased the temperature of the PDMS/Au composites to as high as 75.7 °C under artificial solar radiation, compared to 42.1 °C without the Au NPs. By applying the PDMS/Au composites to commercial TE devices, the electrical performance of the TE devices is enhanced by approximately threefold.

show abstract

Section: Introductionmentioning

confidence: 99%

Porous Polydimethylsiloxane/Au Composites as Solar‐Light Absorbers for Light‐Driven Thermoelectric Applications

Lee

Biutty

Zakia

et al. 2021

Macro Materials & Eng

View full text Add to dashboard Cite

show abstract

“…Another key component in our design lies in the integration of a foam (low thermal conductivity, about 35 mW m –1 K –1 ) around the thermoelectric device to provide an insulating air layer for efficient heat localization while minimizing fluctuations arising from environmental factors. Consequently, our solar–thermal generator achieves stable and effective solar–thermal–electric conversion with a V OC , I SC , and maximal power output of around 0.3 V, 30 mA, and 3.3 mW, respectively, under 1 sun at room temperature (loading resistance, 13 Ω), notably superior over other reported designs. ,,− Furthermore, our design also enables stable and effective power generation across wide ranges of ambient temperatures (0–25 °C) and solar intensities (1–7 suns). When coupled with a transformation module, a series of multiple solar-driven generators can efficiently charge the mobile phone under sunlight irradiation, attaining an increase in mobile phone power at a rate of 5% per hour.…”

Section: Introductionmentioning

confidence: 89%

Spray-On Carbon Black Nanopowder/Polyvinylidene Fluoride-Based Solar–Thermal–Electric Generators to Power Electronic Devices

Huang

Wang

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Solar-driven generators are an emerging power generation technology due to the use of sunlight as a green and renewable energy source. However, the complex, tedious, and costly fabrication processes impede large-scale practical application. In this work, we demonstrate a unique solar-thermal generator for efficient solar–thermal–electric conversion to enable real-time, outdoor charging applications using green solar energy. Our solar absorber comprises a cost-effective layer of nanoscale carbon black powders/polyvinylidene fluoride (CB/PVDF) mixture that can be easily sprayed onto the hot end of a commercial thermoelectric device for large-scale fabrication of the solar generator. The solar–thermal conversion of the CB/PVDF solar absorber can be enhanced by designing hierarchical, micro/nano-sized porous structures for better light penetration and utilization and using an insulating sponge cover to promote heat localization and avert potential environmental fluctuations. These design criteria are necessary to achieve a stable and high electrical output (3.3 mW under 1 sun), even under diverse operating conditions such as different ambient temperatures (0–25 °C) and various sunlight intensities (1–7 sun). As a proof-of-concept application, our generators can be connected in series/parallel and further integrated with a voltage conversion module to enable the efficient and instantaneous charging of modern electronic devices using green solar energy, notably at a charging rate of about 5% per hour. Our unique design is anticipated to expedite the development of an efficient, portable solar generator with the aim to decentralize green power generation, which is beneficial in remote places that do not have access to the electrical grid.

show abstract

“…[27] The top side of the ribbon device is the PDRC layer and the bottom side is the SSA layer to realize a large temperature gradient for electricity output. Unlike other 3D STE devices, [2,11,28] our SSA parts are always in the bottom, ensuring that the waste heat and solar energy can be utilized simultaneously. Figure 1b displays the fabrication procedure of the helical ribbons.…”

Section: Design and Manufacture Of Ste Devicesmentioning

confidence: 99%

“…[ 2,4,7 ] For example, Suarez et al reported that an STE device provided a low thermal conductivity filler (air) paralleling the TE legs to optimize the thermal impedance. [ 6 ] On the other hand, although diverse strategies were successively employed to settle down the thermal dissipation of the cold side, including heat sink, [ 8,9 ] appropriate air velocities, [ 10 ] and circulation water, [ 11,12 ] these methods use rigid and bulky instruments, even leading to dissipate more energy, which increases the cost of large‐scale application. Other reported studies cooled the cold side by the latent heat of water evaporation of hydrogel.…”

Section: Introductionmentioning

confidence: 99%

Janus Helical Ribbon Structure of Ordered Nanowire Films for Flexible Solar Thermoelectric Devices

et al. 2022

View full text Add to dashboard Cite

On the other hand, although diverse strategies were successively employed to settle down the thermal dissipation of the cold side, including heat sink, [8,9] appropriate air velocities, [10] and circulation water, [11,12] these methods use rigid and bulky instruments, even leading to dissipate more energy, which increases the cost of large-scale application. Other reported studies cooled the cold side by the latent heat of water evaporation of hydrogel. [13,14] However, it is difficult to keep cooling in a dry environment. Meanwhile, some researchers utilized solar-absorbing substrates to enhance the temperature of the hot side by a dual heat source of waste heat and light. [15,16] Regrettably, the cold sides of STE devices have poor reflectivity to sunlight. Therefore, how to cost-effectively attain desirable ΔT for large-scale implementations is still a challenge.Currently, the passive daytime radiative cooling (PDRC) technique [17][18][19][20] is an emerging and scalable cooling technique, showing encouraging capacity in outdoor cooling fields without extra energy supplements. By taking advantage of the cold space source, the natural but extremely vast heat sink, PDRC materials reflect almost all solar spectrum (wavelength (λ) ≈ 0.28-2.5 µm) to suppress temperature rise in addition to emitting most heat (λ ≈ 8-13 µm) toward the cold space (≈3 K), in which these materials can reach an approximate or even subambient temperature without extra energy input. [21][22][23][24] Thus, increasing thermal dissipation of the cold side will be achieved well via flexible PDRC thin films. At the same time, for the larger ΔT across STE legs, Solar thermoelectric devices play a significant role in addressing the problem of global warming, owing to their unique features of converting both waste heat and solar energy directly into electricity. Herein, a flexible 3D Janus helical ribbon architecture is designed, starting from well-aligned tellurium (Te) nanowire film, using an in situ redox process reacting with Ag + and Cu 2+ resulting in n-type, p-type, and photothermal sides in one film. Remarkably, the device shows all-day electricity generation and large temperature gradient by coupling the cold side with a passive radiative cooling technique and the hot side with a selective solar absorption technique, showing a temperature gradient of 29.5 K, which is much higher than previously reported devices under a low solar radiation of only 614 W m −2 . Especially, the device can still generate electricity even at night. The present strategy offers a new way for heat management by efficiently utilizing solar energy and the cold of the universe.

show abstract

Solution-Processed Plasmonic–Dielectric Sunlight-Collecting Nanofilms for Solar Thermoelectric Application

Cited by 6 publications

References 68 publications

Porous Polydimethylsiloxane/Au Composites as Solar‐Light Absorbers for Light‐Driven Thermoelectric Applications

Porous Polydimethylsiloxane/Au Composites as Solar‐Light Absorbers for Light‐Driven Thermoelectric Applications

Spray-On Carbon Black Nanopowder/Polyvinylidene Fluoride-Based Solar–Thermal–Electric Generators to Power Electronic Devices

Janus Helical Ribbon Structure of Ordered Nanowire Films for Flexible Solar Thermoelectric Devices

Contact Info

Product

Resources

About