Optical and electrical properties of TTF-MPcs (M = Cu, Zn) interfaces for optoelectronic applications
- ,
- Mariel Leyva-Esquedae(Author),
- José Ramón Alvárez-Badae(Author),
- Verónica García-Montalvoc(Author),
- Iván Darío Rojas-Montoyac(Author),
- Omar Jiménez-Sandovald(Author)
- ,
- ,
- cUniversidad Nacional Autónoma de México,
- dInstituto Politécnico Nacional,
- eUniversidad Anáhuac
Open access
Publication Information
Output type
Original language
EnglishPages from-to (Number of pages)
Pages 21037-21049 (13 pages)Journal (Volume, Issue Number)
Molecules (Volume 20, Issue 12)Publication milestones
- Published - 25/11/2015
Publication status
External Publication IDs
- Scopus: 84954348941
- PubMed: 26610466
Abstract
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.