Performance Improvement of Inverted Organic Light-Emitting-Diodes Using ZnO Nanostructure

• Main Authors: Hui Lin, 林暉
• Other Authors: 李清庭
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/99009937337744195025

碩士 === 國立成功大學 === 微電子工程研究所 === 102 === In this work, the ZnO film was applied to inverted organic light emitting diode(IOLED) as electron injection layer using RF sputter, and the ZnO nanorod array was insertes into the IOLED to improve the efficiency of the IOLED. By inserting the ZnO nanorod array, the total reflection of the interface of the active layer and the ZnO layer will be reduced due to the morphology of ZnO nanorod array, hence it will improve the light output of the IOLED. Moreover, the ZnO nanorod array increase the contact area between the active layer and the ZnO layer, and increase the amount of injected electrons, that will ameliorate the problem that the electron injection is difficult in this IOLED, and substantial improve the luminance and the current efficiency of the IOLED. Compare to the device without ZnO nanorod array, the maximum luminance was increased to 10814 cd/m2 and the current efficiency was increased to 1.8 cd/A for the IOLED with 65-nm-long ZnO nanorod array.