The electroforming effect in polycrystalline fullerene С$_{60}$ films

I. B. Zakharova, D. I. Dolzhenko, V. F. Borodzyulya, N. T. Sudar

Peter the Great St. Petersburg Polytechnic University

Abstract: Long-term exposure of a polycrystalline fullerene С$_{60}$ film in a constant electric field of 1–4 MV/cm produces an electroforming effect manifested by increase in conductivity of the film within several orders of magnitude. After this electroforming, the current–voltage ( I – U ) characteristic shows a high degree of current stability and reproducibility of results. In fields of 10$^5$–10$^6$ V/cm, the I – U characteristics of electroformed films are determined by the space-charge limited current. The concentration ($N_{t}\approx$ 4 $\times$ 10$^{21}$ m$^{-3}$) of carrier traps and their energy ($E_{t}\approx$ 0.176 eV) have been estimated.

Received: 16.11.2018
Revised: 23.11.2018
Accepted: 23.11.2018

DOI: 10.21883/PJTF.2019.04.47331.17596