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[001]-oriented crystalline Potassium-Sodium Niobate thin film fabricated at low temperature for use in piezoelectric energy harvester

Kim, Jong-Hyun ; Woo, Jong-Un ; Yee, Yeon-Jeong ; Kim, In-Su ; Shin, Ho-Sung ; Hwang, Hyun-Gyu ; Kweon, Sang Hyo ; Choi, Hyun-Ju ; Nahm, Sahn

Applied surface science, 2021-01, Vol.537, p.147871, Article 147871 [Periódico revisado por pares]

Elsevier B.V

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  • Título:
    [001]-oriented crystalline Potassium-Sodium Niobate thin film fabricated at low temperature for use in piezoelectric energy harvester
  • Autor: Kim, Jong-Hyun ; Woo, Jong-Un ; Yee, Yeon-Jeong ; Kim, In-Su ; Shin, Ho-Sung ; Hwang, Hyun-Gyu ; Kweon, Sang Hyo ; Choi, Hyun-Ju ; Nahm, Sahn
  • Assuntos: Low-temperature deposition process ; oriented crystalline KNN thin film ; Piezoelectric energy harvester ; Sr2Nb3O10 nanosheet seed layer
  • É parte de: Applied surface science, 2021-01, Vol.537, p.147871, Article 147871
  • Descrição: [Display omitted] •Crystalline K1-xNaxNbO3(CKNN) film was grown on various substrates at 350 °C.•Sr2Nb3O10 nanosheet acted as a seed layer for the formation of C-KNN film at 350 °C.•[001]-oriented CKNN film PEH exhibited a large output power density of 20 μW/mm3.•CKNN film PEH is transparent with a maximum transmittance of 55% at visible range. In this study, 1.0-μm thick crystalline (K1-xNax)NbO3 (KNN) films were deposited onto various substrates at 350 °C for use in piezoelectric energy harvesters (PEHs). A Sr2Nb3O10 (SN) nanosheet monolayer fabricated on these substrates acted as the seed-layer for the formation of a [001]-oriented crystalline KNN film at 350 °C. The [001]-oriented KNN films deposited on a SN/Ni substrate exhibited smaller εr (278) and larger d33 (166 pm/V) values than those of a randomly oriented crystalline KNN film. Because the output power of the PEH is generally proportional to d332/εr, a [001]-oriented KNN thin film is a good material for use in a PEH. A KNN/SN/Ni PEH shows a large output power density of 20 μW/mm3 (2.9 μW) at 1.0 MΩ based on a soft tapping motion of the finger. The KNN/SN fabricated on the Ni substrate was transferred to a flexible and transparent ITO/polyethylene naphthalate (I-PEN) substrate. The transparent KNN/SN/I-PEN PEH exhibited a promising output power density of 7.02 μW/mm3 with a maximum output voltage of 4.2 V, indicating its applicability as a power source of an electrochromic smart glass window.
  • Editor: Elsevier B.V
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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