標題: | Optimal design and fabrication of ITO/organic photonic crystals in polymer light-emitting diodes using a focused ion beam |
作者: | Tsai, Che-Hung Liao, Lun-De Luo, Yi-Shiun Chao, Paul C. -P. Chen, En-Chen Meng, Hsin-Fei Chen, Wei-Dar Lin, Shir-Kuan Lin, Chin-Teng 影像與生醫光電研究所 物理研究所 電機工程學系 Institute of Imaging and Biomedical Photonics Institute of Physics Department of Electrical and Computer Engineering |
關鍵字: | Focused ion beam;Light extraction efficiency;Photonic crystals;Polymer light-emitting diodes |
公開日期: | 1-五月-2010 |
摘要: | This study aims to achieve high directionality and large extraction of light emission from polymer light-emitting diodes via optimizing photonic crystals (PCs). The optimization is achieved through the optical modeling using a 3D finite-difference time-domain (FDTD) method and the intelligent numerical optimization technique, genetic algorithm (GA). In results, the PC period, depth and filling factor can be found. The FDTD method has been proven very effective for modeling complex multilayer PLED devices in which the electron-transporting layer is only a few tens of nanometers away from a metallic layer. On the other hand, GA is a powerful tool to cope with a complicated optimization problem with multiple variables to optimize. The optimized PCs are later fabricated by focused ion beams (FIB) for the PLED. With desired PCs, an increase of the extraction efficiency in excess of 46% is achieved experimentally and the 3D FDTD calculation explains this result faithfully. (C) 2009 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.mee.2009.12.041 http://hdl.handle.net/11536/9789 |
ISSN: | 0167-9317 |
DOI: | 10.1016/j.mee.2009.12.041 |
期刊: | MICROELECTRONIC ENGINEERING |
Volume: | 87 |
Issue: | 5-8 |
起始頁: | 1331 |
結束頁: | 1335 |
顯示於類別: | 會議論文 |