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Emission and absorption of Ir(ppy)₂(CO)(Cl) - Temperature dependence, phosphorescence decay dynamics, and assignments of excited states

Finkenzeller, Walter J. ; Stoessel, P. ; Yersin, Hartmut



Abstract

Emission spectra and decay times of Ir(ppy)₂(CO)(Cl) dissolved in THF were recorded for 1.2 K =< T =< 300 K. The emission stems from a triplet state T₁ which is split into three substates by less than 1 cm⁻¹. We classify this state as ³LC (ligand centered, ppyππ*) state. At T = 1.2 K, the substates emit independently with three individual decay times (τ(I) = 300 μs, τ(II) = 85 μs, τ(III) = 9 μs) ...

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