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-Oct-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
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