Journal
OPTIK
Volume 123, Issue 15, Pages 1393-1396Publisher
ELSEVIER GMBH
DOI: 10.1016/j.ijleo.2011.08.018
Keywords
Metal chelates; Tris-(8-hydroxyquinoline)indium; Photoluminescence; Time-resolved photoluminescence; Photoluminescence lifetimes
Categories
Funding
- Council for Scientific and Industrial Research (CSIR), Government of India, New Delhi
Ask authors/readers for more resources
Tris-(8-hydroxyquinoline)indium (Inq(3)) thin films, one of the metal chelates used in organic electroluminescent (EL) devices, were deposited by thermal evaporation process on glass substrates and were exposed to light for various time periods under the normal ambient. The influence of light exposure on the optical properties of Inq(3) thin films were studied by UV-visible absorption, photoluminescence and time-resolved photoluminescence (TRPL) spectroscopic studies. From the photoluminescence decay analysis of as-prepared Inq(3) thin films, it is found that the photoluminescence originates from two species having different lifetimes (shorter and longer) corresponding to its two geometrical isomers, namely facial and meridional respectively. The photoluminescence lifetimes are decreasing for increasing light exposure time clue to the formation of luminescent quencher during the light exposure. It is reported that the energy of excitons in the light exposed Inq(3) thin films can be non-radiatively transferred to its neighbouring luminescent quencher, quenching the photoluminescence of light exposed Inq(3) thin films. (C) 2011 Elsevier GmbH. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available