TY - JOUR
T1 - Optical and electrical properties of TTF-MPcs (M = Cu, Zn) interfaces for optoelectronic applications
AU - Sánchez-Vergara, María Elena
AU - Leyva-Esqueda, Mariel
AU - Alvárez-Bada, José Ramón
AU - García-Montalvo, Verónica
AU - Rojas-Montoya, Iván Darío
AU - Jiménez-Sandoval, Omar
N1 - Publisher Copyright:
© 2015 by The Authors.
PY - 2015/11/25
Y1 - 2015/11/25
N2 - Sandwich structures were fabricated by a vacuum deposition method using MPc (M = Cu, Zn), with a Tetrathiafulvalene (TTF) derivative, and Indium Tin Oxide (ITO) and aluminum electrodes. The structure and morphology of the deposited films were studied by IR spectroscopy, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The absorption spectra of TTF derivative-MPc (M = Cu, Zn) thin films deposited at room temperature were recorded in the spectral range 200-1000 nm. The optical band gap of the thin films was determined from the (αhν)1/2 vs. hν plot. The direct-current (DC) electrical properties of the glass/ITO/TTFderiv-MPc (M = Cu, Zn)/Al structures were also investigated. Changes in conductivity of the derivative-TTF-enriched Pc compounds suggest the formation of alternative paths for carrier conduction. At low voltages, forward current density obeys an ohmic I-V relationship; at higher voltages, conduction is mostly due to a space-charge-limited conduction (SCLC) mechanism.
AB - Sandwich structures were fabricated by a vacuum deposition method using MPc (M = Cu, Zn), with a Tetrathiafulvalene (TTF) derivative, and Indium Tin Oxide (ITO) and aluminum electrodes. The structure and morphology of the deposited films were studied by IR spectroscopy, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The absorption spectra of TTF derivative-MPc (M = Cu, Zn) thin films deposited at room temperature were recorded in the spectral range 200-1000 nm. The optical band gap of the thin films was determined from the (αhν)1/2 vs. hν plot. The direct-current (DC) electrical properties of the glass/ITO/TTFderiv-MPc (M = Cu, Zn)/Al structures were also investigated. Changes in conductivity of the derivative-TTF-enriched Pc compounds suggest the formation of alternative paths for carrier conduction. At low voltages, forward current density obeys an ohmic I-V relationship; at higher voltages, conduction is mostly due to a space-charge-limited conduction (SCLC) mechanism.
KW - Electrical properties
KW - Optical properties
KW - Organic semiconductor
KW - Phthalocyanines
KW - Thin films
UR - https://www.scopus.com/pages/publications/84954348941
U2 - 10.3390/molecules201219742
DO - 10.3390/molecules201219742
M3 - Artículo
C2 - 26610466
AN - SCOPUS:84954348941
SN - 1420-3049
VL - 20
SP - 21037
EP - 21049
JO - Molecules
JF - Molecules
IS - 12
ER -