Hydrogenated Nano-/Micro-Crystalline Silicon Thin-Films for Thermoelectrics

Acosta, Edwin; Wight, Neil M.; Smirnov, Vladimir; Buckman, Jim; Bennett, Nick

doi:10.1007/s11664-017-5977-8

Cited by 7 publications

(1 citation statement)

References 28 publications

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“…Similar morphology but a different scattering mechanism was achieved in hydrogenated microcrystalline Si (μc-Si:H) thin film by Acosta et al 61,62) Thermal annealing did not cause an obvious variation in crystalline size and volume fraction but k dropped from 3.2 to 1.5 W mK −1 (P-type), which was dominantly attributed to carrier-phonon scattering caused by increased carrier concentration after annealing. However, energy barriers in grain interfaces induced the reduction of global carrier concentration and restrained σ to a certain degree; zT of 0.06 was achieved at RT.…”

Section: Low-dimensional Strategies Of Reducing-k-orientedsupporting

confidence: 55%

Silicon-based low-dimensional materials for thermal conductivity suppression: recent advances and new strategies to high thermoelectric efficiency

Lai

Peng

Gao

et al. 2020

Jpn. J. Appl. Phys.

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Thermoelectric (TE) materials can convert any kind of heat into electricity through the Seebeck effect. Harvesting body heat and generating electricity by TE wearable devices can provide a convenient charge service for electrical equipment, even in the case of emergency or disaster. As a high-temperature excellent TE material, silicon also exhibits promising room temperature (RT) potential for wearable TE devices due to its safe and mature production line for the semiconductor industry. Aiming to search for solutions for reducing thermal conductivity (k), this review summarizes the low-dimensional strategies for reducing k based on nanostructural classification, thus enhancing zT at RT, and it also looks into the prospect of wearable application. Following in the footsteps of nanostack (NS), nanowire (NW), nanoporous (NP) and nanocomposite (NC) Sibased TE materials research, we found that the thermal conductivity has been well controlled and that harmonious regulation of the power factor (PF) with k will be the future direction. © 2020 The Japan Society of Applied Physics 14) and Mg 0.97 Zn 0.03 Ag 0.9 Sb 0.95 . 15) Nevertheless, two critical shortcomings limit their application on wearability. On the one hand, most of them are rare in lithosphere and toxic to the human body, which is not desirable in terms of their mass application on skin. On the other hand, the volume of convectional bulk materials cannot satisfy the demand of the increasing miniaturization of wearable terminals.

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Section: Low-dimensional Strategies Of Reducing-k-orientedsupporting

confidence: 55%