Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
848165 | Optik - International Journal for Light and Electron Optics | 2015 | 13 Pages |
Abstract
We have investigated the properties of ultraviolet organic light-emitting diodes (UV OLEDs) using an oxadiazole compound (OXD-7) as emitting materials and MoO3 as hole injection and buffer material. Results have demonstrated that the introduction of MoO3 can achieve a highly efficient UV OLED, which shows a high external quantum efficiency of 1.43% with a peak wavelength of 388Â nm. The impedance spectroscopy elucidates that the hole injection voltage is about 2Â V (via MoO3 interlayer) and 5Â V (without MoO3 interlayer), indicating that the MoO3 interlayer is critical to promote hole injection and achieve high device efficiency.
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Authors
Qi Zhang, Xiaowen Zhang, Bin Wei,