Current-induced fluorescence quenching in organic light-emitting diodes
| Autor: | Ching Wan Tang, Ralph H. Young, Alfred P. Marchetti |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Materials science
Quenching (fluorescence) Physics and Astronomy (miscellaneous) Dopant business.industry Physics::Optics Electroluminescence Photochemistry law.invention Organic semiconductor Condensed Matter::Materials Science law Physics::Atomic and Molecular Clusters OLED Optoelectronics Quantum efficiency Luminescence business Light-emitting diode |
| Zdroj: | Applied Physics Letters. 80:874-876 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.1445271 |
| Popis: | The electroluminescence quantum efficiency of organic light-emitting diodes with a doped Alq [tris(8-quinolinolato)aluminum] emitting layer is found to decrease markedly with increasing current density. This phenomenon was investigated using multilayer device structures permitting bipolar or unipolar carrier transport, and luminescence measurements with simultaneous optical and electrical excitation. The loss of electroluminescence quantum efficiency is attributed to the quenching of the singlet-excited state of the dopant by a cationic species. |
| Databáze: | OpenAIRE |
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