Equivalent circuits of polymer light-emitting diodes with hole-injection layer studied by impedance spectroscopy
| Autor: | Takashi Kobayashi, Hiroyoshi Naito, Takashi Nagase, Takayuki Okachi |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
chemistry.chemical_classification
Materials science Chemical substance business.industry Metals and Alloys Surfaces and Interfaces Polymer Electroluminescence Surfaces Coatings and Films Electronic Optical and Magnetic Materials Dielectric spectroscopy Threshold voltage chemistry Materials Chemistry Equivalent circuit Optoelectronics business Diode Negative impedance converter |
| Zdroj: | Thin Solid Films. 517:1327-1330 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/j.tsf.2008.09.019 |
| Popis: | Impedance spectroscopy (IS) of poly(9,9-dioctylfluorene) (F8) polymer light-emitting diodes (PLEDs) with hole-injection layers has been studied to determine their equivalent circuits. The equivalent circuits of the PLEDs below and above the threshold voltage for electroluminescence (EL) and their physical interpretation are shown. A significant difference in equivalent circuits is observed between below and above the threshold for EL. Above EL threshold, two R–L series branches, which are the origin of the negative capacitance effect, appear in the equivalent circuit. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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