Optical engineering of light-emitting electrochemical cells including microcavity effect and outcoupling extraction technologies

Hai-Ching Su*

*此作品的通信作者

研究成果: Chapter同行評審

摘要

Light-emitting electrochemical cells (LEC) have received much scientific interest after the first demonstration in 1995. In addition to enormous progresses in development of novel emissive materials for LECs, charge carrier balance has been improved to significantly enhance device efficiency of LECs. However, further improvement in device performance is still required to meet industrial applications. Optical engineering techniques involving interference, scattering, and waveguiding effects in device optical structures would be feasible approaches to modify the electroluminescence (EL) spectrum and to extract more light output from LECs. In this chapter, the microcavity effect and outcoupling extraction technologies are reviewed in detail. This complements the introduction provided in Chap. 1. Microcavity effect can be employed to tailor the EL spectrum of LECs by adjusting the interference effect. Scattering from microlens array increases light outcoupling from substrates of LECs. Furthermore, color conversion and waveguide coupling result in more light extraction, since both EL trapped in waveguide and substrate mode would be harvested. With these promising techniques, doubled device efficiency can be realized. These results confirm that optical engineering techniques are necessary to achieve highly efficient LECs.

原文English
主出版物標題Light-Emitting Electrochemical Cells
主出版物子標題Concepts, Advances and Challenges
發行者Springer International Publishing
頁面77-92
頁數16
ISBN(電子)9783319586137
ISBN(列印)9783319586120
DOIs
出版狀態Published - 31 7月 2017

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