A method for obtaining a thin-film flexible biodegradable thermoelectric material, in which semiconductor films are deposited on the surface of a biopolymer nanocellulose, which can be biodegraded and is an alternative to conventional polymeric substrates based on oil. In this case, semiconductor films of copper iodide of p-type are deposited on flexible transparent nanocellulose films made of non-woody plant raw materials by sequential adsorption and ionic layer reaction.

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