Characteristics of Electroluminescence Based on Zn Complexes
| Autor: | Dong-Eun Kim, Oh Kwan Kwon, Young Soo Kwon, Won Sam Kim, Burm Jong Lee, Yoon Ki Jang |
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| Rok vydání: | 2006 |
| Předmět: |
Physics and Astronomy (miscellaneous)
Electron transporting material General Engineering Analytical chemistry General Physics and Astronomy Benzoxazole Electroluminescence chemistry.chemical_compound Improved performance chemistry Electron affinity Cyclic voltammetry Ionization energy Information display Nuclear chemistry |
| Zdroj: | Japanese Journal of Applied Physics. 45:3725-3728 |
| ISSN: | 1347-4065 0021-4922 |
| Popis: | Recently, organic light-emitting diodes (OLEDs) have widely been used as one of the information display techniques. We synthesized 2-(2-hydroxyphenyl)benzoxazole [Zn(HPB)2], (1,10-phenanthroline)(8-hydroxyquinoline) [Zn(phen)q] and (2-(2-hydroxyphenyl)benzoxazole)(8-hydoxyquinoline) [Zn(HPB)q]. The ionization potential (IP) and electron affinity (EA) of Zn complexes were investigated by cyclic voltammetry (CV). The EAs of Zn(HPB)2, Zn(HPB)q, and Zn(phen)q were determined to be 2.8, 3.5, and 3.2 eV, respectively. Moreover, the IPs of Zn(HPB)2, Zn(HPB)q, and Zn(phen)q are 6.5, 6.8, and 7.3 eV, respectively. The EL spectra of Zn(HPB)2, Zn(HPB)q, and Zn(phen)q were observed at the wavelengths of 455, 532, and 535 nm, respectively. We used Zn(HPB)2 and Zn(HPB)q as hole-blocking materials and Zn(phen)q as an electron-transporting material. The efficiency of the device with Zn(HPB)2 increased compared with that of the device without it. The device with Zn(phen)q exhibited an improved performance Alq3 as an electron-transporting material. |
| Databáze: | OpenAIRE |
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