Journal
CHEMPHYSCHEM
Volume 12, Issue 17, Pages 3331-3336Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201100310
Keywords
computational chemistry; density functional calculations; organic light-emitting diodes; phosphorescence energy; transition metals
Funding
- Deutsche Forschungsgemeinschaft [SFB/TRR 88]
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The phosphorescence energy in organometallic transition-metal compounds relevant for organic light-emitting diodes is calculated using spin-flip time-dependent density functional theory within the TammDancoff approximation, a technique presented by Wang and Ziegler. This method is implemented in the TURBOMOLE program suite by modifications of the present code. The predictions of the tripletsinglet transition energies with the spin-flip approach using functionals of the local density approximation are significantly more stable than those obtained from the indirect calculation as singlettriplet excitation with conventional time-dependent density functional theory. They are also more stable than those of ?-SCF, even if more sophisticated generalized gradient or hybrid functionals are used for the latter.
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