Ambipolar small molecule hosts for phosphorescent guest emitters
US9133177B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Jun 21, 2010 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Jun 3, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K2101/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The inventions describe disclosed and described herein relate to ambipolar small molecule host materials for guest phosphorescent metal complexes. Methods of making the ambipolar small molecules are also described. These ambipolar small molecules, which comprise both an oxadiazole and one or more carbazole groups, can be used to make the emission layers of unexpectedly efficient OLED devices containing the materials of the inventions, wherein (I) at least one of the R1, R2 and R3 groups is an optionally substituted carbazole group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.