https://scholars.lib.ntu.edu.tw/handle/123456789/491231
標題: | Air-stable flexible organic light-emitting diodes enabled by atomic layer deposition | 作者: | Lin, Y.-Y. Chang, Y.-N. Tseng, M.-H. Wang, C.-C. Tsai, F.-Y. FENG-YU TSAI |
關鍵字: | Atomic layer deposition; Encapsulation; Lighting; Organic light emitting diodes | 公開日期: | 2015 | 卷: | 26 | 期: | 2 | 來源出版物: | Nanotechnology | 摘要: | Organic light-emitting diodes (OLED) are an energy-efficient light source with many desirable attributes, besides being an important display of technology, but its practical application has been limited by its low air-stability. This study demonstrates air-stable flexible OLEDs by utilizing two atomic-layer-deposited (ALD) films: (1) a ZnO film as both a stable electron-injection layer (EIL) and as a gas barrier in plastics-based OLED devices, and (2) an Al2O3/ZnO (AZO) nano-laminated film for encapsulating the devices. Through analyses of the morphology and electrical/gas-permeation properties of the films, we determined that a low ALD temperature of 70°C resulted in optimal EIL performance from the ZnO film and excellent gas-barrier properties [water vapor transmission rate (WVTR) <5 × 10-4 gm-2 day-1] from both the ZnO EIL and the AZO encapsulating film. The low-temperature ALD processes eliminated thermal damage to the OLED devices, which were severe when a 90°C encapsulation process was used, while enabling them to achieve an air-storage lifetime of >10 000 h. © 2015 IOP Publishing Ltd. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/491231 | DOI: | 10.1088/0957-4484/26/2/024005 | SDG/關鍵字: | Atomic layer deposition; Atoms; Deposition; Diodes; Encapsulation; Energy efficiency; Gas permeable membranes; Light sources; Lighting; Metallic films; Temperature; Zinc oxide; Atomic layer deposited; Electron-injection layers; Encapsulation process; Energy efficient; Flexible organic light - emitting diodes; Low temperatures; Nano-laminated films; Water vapor transmission rate; Organic light emitting diodes (OLED) |
顯示於: | 材料科學與工程學系 |
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