Delayed fluorescence material and organic electroluminescence device
US9783734B2 · kind B2 · utility
6Cited by
5References
5Claims
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Key dates
| Filing date | Aug 29, 2011 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Jul 18, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2102/103
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A delayed fluorescence material containing a mixture of an acceptor compound and a donor compound that satisfies the following formulae (1) to (4):T1A−S1>0.2 eV (1)T1D−S1≧0.2 eV (2)|LUMOA|>2.0 eV (3)|HOMOD|≦5.3 eV (4)wherein T1A represents the excited triplet energy of the acceptor compound; T1D represents the excited triplet energy defined of the donor compound; S1 represents the excited singlet energy of the exciplex; LUMOA represents the energy level of LUMO of the acceptor compound; and HOMOD represents the energy level of HOMO of the donor compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.