Current instability in heterostructures based on thin layers of colloidal Ag$_2$Se quantum dots and fullerene C$_{60}$

V. S. Gurchenko^a, A. S. Mazinov^a, A. S. Tyutyunik^a, I. G. Grevtseva^b, M. S. Smirnov^b, S. V. Aslanov^b, O. V. Ovchinnikov<sup>b

a</sup> V. I. Vernadsky Crimean Federal University, Simferopol, Russia
^b Voronezh State University, Voronezh, Russia

Abstract: This paper presents studies of the electrical properties of thin-film layers of colloidal silver selenide quantum dots (Ag$_2$Se), as well as heterostructures based on fullerene C$_{60}$ and Ag$_2$Se. The synthesis of materials, the technique for obtaining thin films and heterostructures are described. The study of conductive properties was carried out by analyzing the current-voltage characteristics. It is shown that thin films of Ag$_2$Se in the Al–C$_{60}$–Ag$_2$Se–ITO sandwich structure system have unique current-voltage characteristics, in particular, they have current instability with inversion of the sign of the flowing current. Implementation of the heterostructure in the Al–Ag$_2$Se–ITO system makes it possible to stabilize and enhance this effect.

Keywords: Ag$_2$Se, thin-film structures, voltage-current characteristics, current instability.

Received: 18.07.2023
Revised: 04.09.2023
Accepted: 19.09.2023

DOI: 10.61011/PJTF.2023.21.56463.19687

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