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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...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2014
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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. |
format | Online Article Text |
id | pubmed-5456141 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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