Effect of concentration on the photophysics of dyes in light-scattering materials.

Photoactive materials based on dye molecules incorporated into thin films or bulk solids are useful for applications as photosensitization, photocatalysis, solar cell sensitization and fluorescent labeling, among others. In most cases, high concentrations of dyes are desirable to maximize light abso...

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Autores principales: Rodríguez, Hernán Bernardo, San Roman, Enrique Arnoldo
Publicado: 2013
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00318655_v89_n6_p1273_Rodriguez
http://hdl.handle.net/20.500.12110/paper_00318655_v89_n6_p1273_Rodriguez
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00318655_v89_n6_p1273_Rodriguez
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spelling paper:paper_00318655_v89_n6_p1273_Rodriguez2023-06-08T14:57:27Z Effect of concentration on the photophysics of dyes in light-scattering materials. Rodríguez, Hernán Bernardo San Roman, Enrique Arnoldo Photoactive materials based on dye molecules incorporated into thin films or bulk solids are useful for applications as photosensitization, photocatalysis, solar cell sensitization and fluorescent labeling, among others. In most cases, high concentrations of dyes are desirable to maximize light absorption. Under these circumstances, the proximity of dye molecules leads to the formation of aggregates and statistical traps, which dissipate the excitation energy and lower the population of excited states. The search for enhancement of light collection, avoiding energy wasting requires accounting the photophysical parameters quantitatively, including the determination of quantum yields, complicated by the presence of light scattering when particulate materials are considered. In this work we summarize recent advances on the photophysics of dyes in light-scattering materials, with particular focus on the effect of dye concentration. We show how experimental reflectance, fluorescence and laser-induced optoacoustic spectroscopy data can be used together with theoretical models for the quantitative evaluation of inner filter effects, fluorescence and triplet formation quantum yields and energy transfer efficiencies. © 2013 The American Society of Photobiology. Fil:Rodríguez, H.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:San Román, E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00318655_v89_n6_p1273_Rodriguez http://hdl.handle.net/20.500.12110/paper_00318655_v89_n6_p1273_Rodriguez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Photoactive materials based on dye molecules incorporated into thin films or bulk solids are useful for applications as photosensitization, photocatalysis, solar cell sensitization and fluorescent labeling, among others. In most cases, high concentrations of dyes are desirable to maximize light absorption. Under these circumstances, the proximity of dye molecules leads to the formation of aggregates and statistical traps, which dissipate the excitation energy and lower the population of excited states. The search for enhancement of light collection, avoiding energy wasting requires accounting the photophysical parameters quantitatively, including the determination of quantum yields, complicated by the presence of light scattering when particulate materials are considered. In this work we summarize recent advances on the photophysics of dyes in light-scattering materials, with particular focus on the effect of dye concentration. We show how experimental reflectance, fluorescence and laser-induced optoacoustic spectroscopy data can be used together with theoretical models for the quantitative evaluation of inner filter effects, fluorescence and triplet formation quantum yields and energy transfer efficiencies. © 2013 The American Society of Photobiology.
author Rodríguez, Hernán Bernardo
San Roman, Enrique Arnoldo
spellingShingle Rodríguez, Hernán Bernardo
San Roman, Enrique Arnoldo
Effect of concentration on the photophysics of dyes in light-scattering materials.
author_facet Rodríguez, Hernán Bernardo
San Roman, Enrique Arnoldo
author_sort Rodríguez, Hernán Bernardo
title Effect of concentration on the photophysics of dyes in light-scattering materials.
title_short Effect of concentration on the photophysics of dyes in light-scattering materials.
title_full Effect of concentration on the photophysics of dyes in light-scattering materials.
title_fullStr Effect of concentration on the photophysics of dyes in light-scattering materials.
title_full_unstemmed Effect of concentration on the photophysics of dyes in light-scattering materials.
title_sort effect of concentration on the photophysics of dyes in light-scattering materials.
publishDate 2013
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00318655_v89_n6_p1273_Rodriguez
http://hdl.handle.net/20.500.12110/paper_00318655_v89_n6_p1273_Rodriguez
work_keys_str_mv AT rodriguezhernanbernardo effectofconcentrationonthephotophysicsofdyesinlightscatteringmaterials
AT sanromanenriquearnoldo effectofconcentrationonthephotophysicsofdyesinlightscatteringmaterials
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