On the Mechanism of Charge Carrier Generation in Thin Layers of Molecular Associates

Abstract

Measurements are made of the dependence of the electrical current on voltage and sample thickness for thin layer systems of some molecular associates (MA) with intermolecular hydrogen bonds. The results show that the MA under investigation may be divided into two groups with respect t o the mechanism of charge carrier generation in high electrical field ( E = lo4 to lo6 V/cm). For the first group of MA, the ohmic region of C-V characteristics is followed by a non-linear injection region of space charge limited current (SCLC) type with a quasi-continuous exponential trap distribution, A t higher electrical fields ( E > lo5 Vjcm) the injection region passes t o the dominating bulk ionization region.For the second group of MA the bulk ionization region follows directly after the ohmic region. The main experimental criteria of both mechanisms are discussed.

The Influence of the Hyperfine Range Magnetic Field on Charge Transfer States at the Metal–Organic Semiconductor Interface

“…The thin-layer systems were prepared by vacuum sublimation of TTT sandwiched between semitransparent Au (lower) and A1 (upper) electrodes on glass or quartz substrates according to [16].…”

Photoelectrical properties, energy level spectra, and photogeneration mechanisms of pentacene

“…Current-voltage characteristics (cv) i d = f ( u) and thickness dependence of current id = f(L) of Pc samples were studied under space charge limited current (SCLC) conditions caused by field injected holes from the positive metallic electrode [22, 18, 191.Using the criteria proposed in[18], it was estimated that in the superlinear region of CV characteristics (i5 2 gat), ranging from field intensities of 8 N ; = lo4 to lo5 V/cm, the i, = f ( U , L ) dependence may be approximated by where n > 1.…”

Crystal structure determination of rac-11′-(1-acetyl-1H-indazol-3-yl)-11′,11a′-dihydro-10′H,17′H-spiro[indene-2,18′-[5a,16b]methanotriindeno[1,2-b:1′,2′-d:2′′,1′′-g]oxocine]-1,3,10′,12′,17′(10a′H)-pentaone acetonitrile 1.5-solvate

“…1,3-Indandione derivatives have been known for more than a century and have found numerous applications as drugs (anticoagulants, analgesics, anti-inflammatory medicines; Eriks et al,1979), reagents in analytical and forensic chemistry (ninhydrins; Hansen & Joullié, 2005), dyes and pigments (Manukian & Mangini, 1970;Schelz, 1975;Bello et al, 1987), semiconductors and photo semiconductors (Silinsh & Taure, 1969), and components of advanced materials (Gvishi et al, 2003;Acharya et al, 2005;Lokshin et al, 2017). One of the important features of 1,3-indandione as well as its dimer bindone [2-(2,3-dihydro-3-oxo-1H-inden-1-ylidene)-1Hindene-1, 3(2H)-dione] is the ease of their self-condensation, often with the formation of complex cyclic structures (Jacob et al, 2000).…”

“…One of the important features of 1,3-indandione as well as its dimer bindone [2-(2,3-dihydro-3-oxo-1H-inden-1-ylidene)-1Hindene-1, 3(2H)-dione] is the ease of their self-condensation, often with the formation of complex cyclic structures (Jacob et al, 2000). For over a century, cyclic 1,3-diketones have been known to form condensation products, including selfcondensation (Wislicenus, 1887). As a result of this property, they have found use as intermediates for condensed cyclization products (Sekhar, 2004;Kozlov & Gusak, 2006) that have themselves found use as antiemetic (Kuang et al, 1994) and anticancer (Heidelberger & Ansfield, 1963) drugs.…”