Improved High-Brightness Efficiency of Phosphorescent Organic LEDs Comprising Emitter Molecules with Small Permanent Dipole Moments
Weaker triplet‐triplet annihilation (TTA) is observed in organic solid mixed systems comprising the phosphorescent emitter Ir(ppy)2(acac), which has a smaller dipole moment than the reference compound Ir(ppy)3. Spectral and time‐resolved analysis show that the weaker TTA can be explained by lower em...
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| Veröffentlicht in: | Advanced materials (Weinheim) 2010-08, Vol.22 (29), p.3189-3193 |
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| container_title | Advanced materials (Weinheim) |
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| creator | Reineke, Sebastian Rosenow, Thomas C. Lüssem, Björn Leo, Karl |
| description | Weaker triplet‐triplet annihilation (TTA) is observed in organic solid mixed systems comprising the phosphorescent emitter Ir(ppy)2(acac), which has a smaller dipole moment than the reference compound Ir(ppy)3. Spectral and time‐resolved analysis show that the weaker TTA can be explained by lower emitter aggregation, which reduces diffusion‐based TTA. |
| doi_str_mv | 10.1002/adma.201000529 |
| format | Article |
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Mater</addtitle><description>Weaker triplet‐triplet annihilation (TTA) is observed in organic solid mixed systems comprising the phosphorescent emitter Ir(ppy)2(acac), which has a smaller dipole moment than the reference compound Ir(ppy)3. 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| ispartof | Advanced materials (Weinheim), 2010-08, Vol.22 (29), p.3189-3193 |
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| source | MEDLINE; Access via Wiley Online Library |
| subjects | Agglomeration aggregation Coordination Complexes - chemistry dipole moment Dipole moments Efficiency Emitters high-brightness Hydroxybutyrates - chemistry Iridium - chemistry Luminescent Agents - chemistry OLEDs Organic solids Pentanones - chemistry Phosphorescence Pyridines - chemistry Quantum Theory roll-off Spectral emittance Thermodynamics triplet-triplet annihilation |
| title | Improved High-Brightness Efficiency of Phosphorescent Organic LEDs Comprising Emitter Molecules with Small Permanent Dipole Moments |
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