Electrical characterization of organic monolayers/silicon hybrid structures

I. V. Malyar, V. O. Lukyanova, E. G. Glukhovskoy, S. B. Venig, D. A. Gorin

Research output: Contribution to journalConference articlepeer-review


Hybrid structures consisting of an n-Si substrate covered with a cationic polyethylenimine layer and an anionic dye layer were fabricated. Their electrical properties were characterized using tunnel current measurements by a tungsten probe. The obtained I-V curves were analyzed using a modified diode equation. We found out that adsorption of the cationic polyelectrolyte decreases the barrier height of n-Si/organic monolayer/W structure, while adsorption of the low molecular weight anionic dye increases it. The results demonstrate that along with thermionic mechanism other ones are present which prevail at low voltage. In particular, electron tunneling dominates for a single monolayer on the silicon substrate, while, apparently, the Pool-Frenkel mechanism is typical for two monolayers.

Original languageEnglish
Article number012025
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 26 Feb 2016
Externally publishedYes
Event17th Russian Youth Conference on Physics of Semiconductors and Nanostructures, Opto- and Nanoelectronics, RYCPS 2015 - St. Petersburg, Russian Federation
Duration: 23 Nov 201527 Nov 2015


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