IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
Photoluminescence lifetime of Ir(ppy)3 used for organic light emitting diodes
Taiju TsuboiNadeer Aljaroudi
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2004 Volume 1 Issue 10 Pages 281-286

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Abstract

We calculated temperature dependence of photoluminescence (PL) lifetime of fac tris(2-phenylpyridine) iridium (Ir(ppy)3) doped in 4, 4'-N, N'-dicarbazole-biphenyl (CBP). The emitting triplet state consists of three zero-field splitting substates. Taking into account non-radiative transitions among these substates, rate equations for the populations of the substates are solved and three PL lifetimes are derived. A good agreement has been obtained for the temperature dependence between the observed lifetime and calculated long lifetime.

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© 2004 by The Institute of Electronics, Information and Communication Engineers
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