標題: | ITO-free large-area top-emission organic light-emitting diode by blade coating |
作者: | Chang, Hao-Wen Meng, Hsin-Fei Horng, Sheng-Fu Zan, Hsiao-Wen 物理研究所 Institute of Physics |
關鍵字: | Organic light-emitting diode;ITO-free;Top emission;Large area;Solution process;Blade coating |
公開日期: | 二月-2016 |
摘要: | Large-area top-emitting organic light-emitting diodes (TEOLEDs) with multi-layer structure are successfully demonstrated using the solution-processable blade coating on ITO-free substrate. The semitransparent cathode of TEOLED is composed of lithium fluoride (LiF), aluminum (Al) and silver (Ag). The composition of 3 nm Al and 10 nm Ag has a transmittance of 56% and a sheet resistance of 11 Omega/square is applied to the green phosphorescence device with an emissive area of 2 cm by 2.5 cm. The maximum current efficiency is 25.2 cd/A with high light-emission uniformity within 10% variation. The large-area TEOLEDs show comparable current efficiency as the small-area devices with an emissive area of 2 mm by 2 mm (having the same device structure) and better efficiency than traditional large-area bottom emitting devices. Cesium fluoride (CsF) and n-doped electron transport layer are applied to improve electron injection. At 6 V, the luminance is raised from 141 cd/m(2) to 502 cd/m(2) and 304 cd/m(2), respectively. In n-doped device, a simple Al/Ag cathode is used without LiF. (C) 2015 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.synthmet.2015.11.025 http://hdl.handle.net/11536/133019 |
ISSN: | 0379-6779 |
DOI: | 10.1016/j.synthmet.2015.11.025 |
期刊: | SYNTHETIC METALS |
Volume: | 212 |
起始頁: | 19 |
結束頁: | 24 |
顯示於類別: | 期刊論文 |