The mechanism of efficiency enhancement with proper thickness of DPVBi layer for blue organic light-emitting devices (BOLED) |
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| Authors: | Chien-Jung Huang Teen-Hang Meen Kuo-Chien Liao Yan-Kuin Su |
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| Institution: | 1. Department of Applied Physics, National University of Kaohsiung, #700 Kaohsiung University Road, Nanzih, Kaohsiung 811, Taiwan;2. Department of Electronic Engineering, National Formosa University, 64, Wen-Hwa Road, Hu-Wei, Yunlin 632, Taiwan;3. Institute of Electro-Optical Engineering, National Sun Yat-Sen University, #70 Lien-hai Road, Kaohsiung 804, Taiwan;4. Institute of Microelectronics and Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan |
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| Abstract: | We report on the fabrication of blue organic light-emitting devices (BOLEDs) with structure: ITO/NPB/DPVBi/Alq3/LiF/Al. The hole-blocking effect in NPB/DPVBi interface was indirectly demonstrated and deduced by inserting DCJTB layer. In addition, the effect of the device with better J–V characteristics because of the extra DCJTB layer is discussed as well. However, the performance of devices was investigated with various thicknesses of DPVBi layer. The result shows that the device with proper thickness of DPVBi layer generating better electron injection enhances efficiency and luminance for BOLED. |
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