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Optical Absorption and Visible Photoluminescence from Thin Films of Silicon Phthalocyanine Derivatives

The interest of microelectronics industry in new organic compounds for the manufacture of luminescent devices has increased substantially in the last decade. In this paper, we carried out a study of the usage feasibility of three organic bidentate ligands (2,6-dihydroxyanthraquinone, anthraflavic ac...

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Autores principales: Rodríguez Gómez, Arturo, Moises Sánchez-Hernández, Carlos, Fleitman-Levin, Ilán, Arenas-Alatorre, Jesús, Carlos Alonso-Huitrón, Juan, Elena Sánchez Vergara, María
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5456141/
https://www.ncbi.nlm.nih.gov/pubmed/28788200
http://dx.doi.org/10.3390/ma7096585
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author Rodríguez Gómez, Arturo
Moises Sánchez-Hernández, Carlos
Fleitman-Levin, Ilán
Arenas-Alatorre, Jesús
Carlos Alonso-Huitrón, Juan
Elena Sánchez Vergara, María
author_facet Rodríguez Gómez, Arturo
Moises Sánchez-Hernández, Carlos
Fleitman-Levin, Ilán
Arenas-Alatorre, Jesús
Carlos Alonso-Huitrón, Juan
Elena Sánchez Vergara, María
author_sort Rodríguez Gómez, Arturo
collection PubMed
description The interest of microelectronics industry in new organic compounds for the manufacture of luminescent devices has increased substantially in the last decade. In this paper, we carried out a study of the usage feasibility of three organic bidentate ligands (2,6-dihydroxyanthraquinone, anthraflavic acid and potassium derivative salt of anthraflavic acid) for the synthesis of an organic semiconductor based in silicon phthalocyanines (SiPcs). We report the visible photoluminescence (PL) at room temperature obtained from thermal-evaporated thin films of these new materials. The surface morphology of these films was analyzed by atomic force microscopy (AFM) and scanning electron microscopy (SEM). AFM indicated that the thermal evaporation technique is an excellent resource in order to obtain low thin film roughness when depositing these kinds of compounds. Fourier transform infrared spectroscopy (FTIR) spectroscopy was employed to investigate possible changes in the intra-molecular bonds and to identify any evidence of crystallinity in the powder compounds and in the thin films after their deposition. FTIR showed that there was not any important change in the samples after the thermal deposition. The absorption coefficient (α) in the absorption region reveals non-direct transitions. Furthermore, the PL of all the investigated samples were observed with the naked eye in a bright background and also measured by a spectrofluorometer. The normalized PL spectra showed a Stokes shift ≈ 0.6 eV in two of our three samples, and no PL emission in the last one. Those results indicate that the Vis PL comes from a recombination of charge carriers between conduction band and valence band preceded by a non-radiative relaxation in the conduction band tails.
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spelling pubmed-54561412017-07-28 Optical Absorption and Visible Photoluminescence from Thin Films of Silicon Phthalocyanine Derivatives Rodríguez Gómez, Arturo Moises Sánchez-Hernández, Carlos Fleitman-Levin, Ilán Arenas-Alatorre, Jesús Carlos Alonso-Huitrón, Juan Elena Sánchez Vergara, María Materials (Basel) Article The interest of microelectronics industry in new organic compounds for the manufacture of luminescent devices has increased substantially in the last decade. In this paper, we carried out a study of the usage feasibility of three organic bidentate ligands (2,6-dihydroxyanthraquinone, anthraflavic acid and potassium derivative salt of anthraflavic acid) for the synthesis of an organic semiconductor based in silicon phthalocyanines (SiPcs). We report the visible photoluminescence (PL) at room temperature obtained from thermal-evaporated thin films of these new materials. The surface morphology of these films was analyzed by atomic force microscopy (AFM) and scanning electron microscopy (SEM). AFM indicated that the thermal evaporation technique is an excellent resource in order to obtain low thin film roughness when depositing these kinds of compounds. Fourier transform infrared spectroscopy (FTIR) spectroscopy was employed to investigate possible changes in the intra-molecular bonds and to identify any evidence of crystallinity in the powder compounds and in the thin films after their deposition. FTIR showed that there was not any important change in the samples after the thermal deposition. The absorption coefficient (α) in the absorption region reveals non-direct transitions. Furthermore, the PL of all the investigated samples were observed with the naked eye in a bright background and also measured by a spectrofluorometer. The normalized PL spectra showed a Stokes shift ≈ 0.6 eV in two of our three samples, and no PL emission in the last one. Those results indicate that the Vis PL comes from a recombination of charge carriers between conduction band and valence band preceded by a non-radiative relaxation in the conduction band tails. MDPI 2014-09-12 /pmc/articles/PMC5456141/ /pubmed/28788200 http://dx.doi.org/10.3390/ma7096585 Text en © 2014 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Rodríguez Gómez, Arturo
Moises Sánchez-Hernández, Carlos
Fleitman-Levin, Ilán
Arenas-Alatorre, Jesús
Carlos Alonso-Huitrón, Juan
Elena Sánchez Vergara, María
Optical Absorption and Visible Photoluminescence from Thin Films of Silicon Phthalocyanine Derivatives
title Optical Absorption and Visible Photoluminescence from Thin Films of Silicon Phthalocyanine Derivatives
title_full Optical Absorption and Visible Photoluminescence from Thin Films of Silicon Phthalocyanine Derivatives
title_fullStr Optical Absorption and Visible Photoluminescence from Thin Films of Silicon Phthalocyanine Derivatives
title_full_unstemmed Optical Absorption and Visible Photoluminescence from Thin Films of Silicon Phthalocyanine Derivatives
title_short Optical Absorption and Visible Photoluminescence from Thin Films of Silicon Phthalocyanine Derivatives
title_sort optical absorption and visible photoluminescence from thin films of silicon phthalocyanine derivatives
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5456141/
https://www.ncbi.nlm.nih.gov/pubmed/28788200
http://dx.doi.org/10.3390/ma7096585
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