Current-Voltage Characteristics of the Metal / Organic Semiconductor / Metal Structures: Top and Bottom Contact Configuration Case

Abstract

In present study five synthesized organic semiconductor compounds have been used for fabrication of the planar metal / organic semiconductor / metal structures. Both top electrode and bottom electrode configurations were used. Current-voltage (I-V) characteristics of the samples were investigated. Effect of the hysteresis of the I-V characteristics was observed for all the investigated samples. However, strength of the hysteresis was dependent on the organic semiconductor used. Study of I-V characteristics of the top contact Al/AT-RB-1/Al structures revealed, that in <br /> (0–500) V voltages range average current of the samples measured in air is only slightly higher than current measured in nitrogen ambient. Deposition of the ultra-thin diamond like carbon interlayer resulted in both decrease of the hysteresis of I-V characteristics of top contact Al/AT-RB-1/Al samples. However, decreased current and decreased slope of the I-V characteristics of the samples with diamond like carbon interlayer was observed as well. I-V characteristic hysteresis effect was less pronounced in the case of the bottom contact metal/organic semiconductor/metal samples. I-V characteristics of the bottom contact samples were dependent on electrode metal used.<p>DOI: <a href="http://dx.doi.org/10.5755/j01.ms.19.1.3816">http://dx.doi.org/10.5755/j01.ms.19.1.3816</a></p

Study of Optical and Electrical Properties of Organic Thin Films for Photovoltaic Applications

“…5. Similar sample configurations have been investigated recently [20,21]. The characteristics have a weak diode character for both voltage polarities (both measured in the dark and under illumination).…”

Electrical characterization of controlled and unintentional modified metal–organic contacts

“…At least, in these experiments, the effect of doping has served only to analyze different current ranges where the hysteresis is detected, being more noticeable at low current regimes. In this regard, the reduction of the hysteresis effect can come not by modifying the contact itself or compensating with doping molecules, but by avoiding different combinations of materials employed in the metal organic contact [54].…”