Synthesis and blue electroluminescent properties of zinc (II) [2-(2-hydroxyphenyl)benzoxazole]
| Autor: | Young-Soo Kwon, Jung Min You, Won Sam Kim, Dong-Eun Kim, Yoon-Ki Jang, Burm-Jong Lee |
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| Rok vydání: | 2007 |
| Předmět: |
business.industry
Metals and Alloys Analytical chemistry chemistry.chemical_element Surfaces and Interfaces Zinc Benzoxazole Electroluminescence Cathode Surfaces Coatings and Films Electronic Optical and Magnetic Materials Anode law.invention chemistry.chemical_compound chemistry law Materials Chemistry OLED Optoelectronics business Luminous efficacy Light-emitting diode |
| Zdroj: | Thin Solid Films. 515:5070-5074 |
| ISSN: | 0040-6090 |
| Popis: | This study reports on the properties of organic light-emitting diodes (OLEDs) with zinc (II) [2-(2-hydroxyphenyl)benzoxazole] as a hole-blocking layer. OLEDs devices are prepared in a conventional OLEDs structure (i.e., anode/HTL/EL/HBL/cathode and anode/HTL/HBL/EL/ cathode). The luminescence efficiencies and the turn-on voltage are significantly affected by the existence of the hole-blocking layer. This is attributed to an excellent hole-blocking property, which is in turn due to the high HOMO energy level (6.5 eV). The device showed luminous efficiency 2.46 Im/W at 5 V. The maximum luminance of about 10,000 cd/m 2 is obtained, and the turn-on voltage (2.5 V) is affected by the existence of the hole-blocking layer. |
| Databáze: | OpenAIRE |
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