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Concentration quenching of a red emitting electroluminescent dye tetraphenylporphyrin: A time-resolved photoluminescence study

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Author(s)

R N Bera, Y Sakakibara, M Tokumoto

School/Research organisations

Abstract

This work deals with the steady-state and time-resolved photoluminescence study of a well-known red emitting electroluminescent dye, tetraphenylporphyrin (TPP), doped in poly(methylmethacrylate). From the time-resolved photoluminescence (PL) study, exponential decay of TPP emission was observed for these doped films in the studied concentrations region (10(-4)-10(-1) mol/L). At lower doping concentrations below 10(-2) mol/L, PL lifetimes of TPP were relatively constant (similar to 10 ns) and equal to that of TPP in dilute solution. A decrease in PL lifetime was observed at high doping concentration, down to 8 ns at a concentration of 10(-1) mol/L. This observed decrease in PL lifetime of TPP with the increase of TPP concentration was due to the concentration quenching of TPP monomer emission by the TPP dimer/aggregate sites formed at such higher concentrations. The results of concentration quenching in TPP system were compared to that of tetraphenylchlorin system reported earlier. (C) 2005 Springer Science + Business Media, Inc.

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Details

Original languageEnglish
Pages (from-to)549-552
Number of pages4
JournalJournal of Materials Science: Materials in Electronics
Volume16
Issue number8
DOIs
Publication statusPublished - Aug 2005

    Research areas

  • REDUCED PORPHYRIN COMPOUND, HOLE-TRANSPORTING MATERIAL, ENERGY-TRANSFER, LIGHT EMISSION, TETRAPHENYLCHLORIN, DEVICES, DIODES, ENHANCEMENT, FILMS, LAYER

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