Issue 8, 2005
From the journal:

Physical Chemistry Chemical Physics

Photoluminescence properties of vapor deposited films of a bisazomethine dye

Takashi Kobayashi,†*a   Shinya Matsumoto,b   Toshihiko Tanaka,a   Hideyuki Kunugita,c   Kazuhiro Ema,c   Tetsuya Aoyamaa  and  Tatsuo Wadaa  

* Corresponding authors

a Supramolecular Science Laboratory, RIKEN (The Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako-shi, Saitama, Japan
E-mail: tkobaya@pe.osakafu-u.ac.jp

b Department of Environmental Sciences, Faculty of Education and Human Sciences, Yokohama National University, 79-2 Tokiwadai, Hodogaya-ku, Yokohama, Kanagawa, Japan

c Department of Physics, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo, Japan

Abstract

Steady-state and time-resolved photoluminescence (PL) measurements on vapor deposited films of a non-ionic bisazomethine dye have been performed. In the films, it is possible to control the ratio between J-aggregate and crystalline phases of the dye by means of exposure to chloroform vapour, and thus the origin of PL can be determined from comparison between several films. In the films, PL was emitted exclusively from the crystalline phase. Although the origin of PL was not from the J-aggregate phase, some features of the observed PL were very similar to those reported for J-aggregates of ionic dyes. We also found that these features in the vapor deposited films were caused by a competition between free excitons and excitons trapped at defect sites.

Graphical abstract: Photoluminescence properties of vapor deposited films of a bisazomethine dye

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Article information

DOI
https://doi.org/10.1039/B418351G
Article type
Paper
Submitted
07 Dec 2004
Accepted
01 Mar 2005
First published
10 Mar 2005

Phys. Chem. Chem. Phys., 2005,7, 1726-1731

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Photoluminescence properties of vapor deposited films of a bisazomethine dye

T. Kobayashi, S. Matsumoto, T. Tanaka, H. Kunugita, K. Ema, T. Aoyama and T. Wada, Phys. Chem. Chem. Phys., 2005, 7, 1726 DOI: 10.1039/B418351G

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