Abstract
Tris-(8-hydroxyquinoline)aluminum (Alq 3) is a widely used light emitting material. It is also used as an electron transporting layer in organic light emitting devices (OLEDs). Degradation is, however, a major problem in these devices. The device performance is affected by parameters such as air, moisture and light exposure [1,2]. In this work the effect of photon degradation of Alq 3 in air is investigated. Alq 3 phosphor powder was synthesized using a co-precipitation method and recrystalized in acetone. The structure of the sample was determined by using x-ray diffraction (XRD). The averaging particle size estimated from the broadened XRD peaks using Scherrers equation was 40±4 nm in diameter. The excitation photoluminescence data that was collected correspond well to the absorption data. To study the photon degradation, the sample was irradiated with an UV lamp for ∼330h. The emission data was collected and the change in photoluminescence intensity with time was monitored.
Original language | English |
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Pages (from-to) | 1521-1524 |
Number of pages | 4 |
Journal | Physica B: Condensed Matter |
Volume | 407 |
Issue number | 10 |
DOIs | |
Publication status | Published - 15 May 2012 |
Externally published | Yes |
Keywords
- Alq powders
- Degradation
- Luminescent mechanism
- Photoluminescence
- Quenchers
- UV exposure
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering