Solution-produced copper iodide thin films for photosensor and for vertical thermoelectric nanogenerator, which uses a spontaneous temperature gradient

Autor: D.O. Zhadan, S.I. Petrushenko, A.L. Khrypunova, D. S. Sofronov, V. R. Kopach, S.V. Dukarov, I. V. Khrypunova, N. P. Klochko, M. V. Kirichenko, V. V. Starikov, K.S. Klepikova, V.M. Lyubov, S. P. Bigas
Rok vydání: 2019
Předmět:
Zdroj: Journal of Materials Science: Materials in Electronics. 30:17514-17524
ISSN: 1573-482X
0957-4522
Popis: The article presents a new design of vertical thermoelectric nanogenerator (TENG) on the base of thin-film CuI/FTO composition with ohmic Cr/Cu contacts, which combines the functions of UV–Visible photosensor. Its functioning as the TENG carried out due to the spontaneous temperature gradient approximately 7 K, which occurs under the uniform heating of the entire device at temperature 30 °C. The open circuit voltage of TENG test sample is Voc = 0.09 mV and maximum output power is Pmax = 0.4 nW at temperature 50 °C. UV–Visible photosensor based on Cu/Cr/CuI/FTO/Cr/Cu composition possess high values of photocurrents Iph under illumination, which eliminates necessity of amplification of the photosensor signal. The photoresponse and reset times of the photosensor are τp ≈ 30–100 s and τr ≈ 20–100 s, respectively. The explanation of the possibility of using CuI thin films, solution-produced by the affordable successive ionic layer adsorption and reaction (SILAR) method as both thermoelectric and photosensitive material is based on the studying of surface morphology, crystal structure, chemical composition and optical properties.
Databáze: OpenAIRE
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