標題: | Improving device efficiencies of solid-state white light-emitting electrochemical cells by adjusting the emissive-layer thickness |
作者: | Jhang, Yuan-Pei Chen, Hsiao-Fan Wu, Hung-Bao Yeh, Yun-Shiuan Su, Hai-Ching Wong, Ken-Tsung 照明與能源光電研究所 Institute of Lighting and Energy Photonics |
關鍵字: | Light-emitting electrochemical cells;Recombination zone;White light |
公開日期: | 1-十月-2013 |
摘要: | Exciton quenching in the recombination zone close to electrochemically doped regions would be one of the bottlenecks for improving device efficiencies of solid-state white light-emitting electrochemical cells (LECs). To further enhance device efficiencies of white LECs for practical applications, we adjust the emissive-layer thickness to reduce exciton quenching. In white LECs with properly thickened emissive-layer thickness, the recombination zone can be situated near the center of the emissive layer, rendering mitigated exciton quenching and thus enhanced device efficiencies. High external quantum efficiencies and power efficiencies of optimized devices reach ca. 11% and 20 lm/W, respectively, which are among the highest reported for white LECs. These results confirm that tailoring the thickness of the emissive layer to avoid exciton quenching would be a feasible approach to improve device efficiencies of white LECs. (C) 2013 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.orgel.2013.06.015 http://hdl.handle.net/11536/22511 |
ISSN: | 1566-1199 |
DOI: | 10.1016/j.orgel.2013.06.015 |
期刊: | ORGANIC ELECTRONICS |
Volume: | 14 |
Issue: | 10 |
起始頁: | 2424 |
結束頁: | 2430 |
顯示於類別: | 期刊論文 |