Electroluminescence and impedance analyses of organic light emitting diodes using anhydride materials as cathode interfacial layers
| Autor: | Junsin Yi, Keunhee Park, Donggeun Jung, Hyoungsub Kim, Heeyeop Chae, Sunyoung Sohn, Mi Ran Moon, Hyung Jun Park, Eunkyoung Nam |
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| Rok vydání: | 2009 |
| Předmět: |
Pyromellitic dianhydride
Materials science business.industry Metals and Alloys chemistry.chemical_element Surfaces and Interfaces Electroluminescence Cathode Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound Trimellitic anhydride chemistry law Aluminium Materials Chemistry OLED Optoelectronics business Layer (electronics) Light-emitting diode |
| Zdroj: | Thin Solid Films. 517:4131-4134 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2009.02.001 |
| Popis: | Pyromellitic dianhydride (PMDA) and trimellitic anhydride (TMA) were tried as cathode interfacial layers between tris-(8-hydroxyquinoline) aluminum (Alq 3 ) and Al in organic light emitting diodes (OLEDs). Both ultra-thin anhydride cathode interfacial layers improved the electroluminescence characteristics of OLEDs compared to those without any interfacial layer, and the PMDA interfacial layer showed the most significant enhancement of the device performance. According to impedance measurements and equivalent circuit analysis, the PMDA interfacial layer decreased the impedance, probably due to the increase in the injection efficiency of electrons from the Al cathode. |
| Databáze: | OpenAIRE |
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