Enhancing light extraction efficiency of organic light-emitting diodes by embedding tungsten trioxide islands or network structure pattern-transferred from a self-assembled deliquesce cesium chloride mask

Bao Dong To, Chia Chen Yu, Jeng Rong Ho, Hung Chih Kan, Chia Chen Hsu

研究成果: 雜誌貢獻期刊論文同行評審

11 引文 斯高帕斯(Scopus)

摘要

We present a new and simple method to improve internal light out-coupling of organic light emitting diodes (OLEDs) by incorporating tungsten trioxide (WO3) islands or network structure in the devices. These structures were pattern-transferred from a cesium chloride (CsCl) film that self-assembled into the islands or network structure as it deliquesced in air. The size and type of structures could be controlled with the thickness of the CsCl film, the relative humidity, the developing time and the developing temperature. The WO3 patterned structures scattered light in the OLEDs devices to extract light trapped in the waveguide modes. As a result, the current efficiencies, external quantum efficiencies and power efficiencies of the WO3 patterned OLEDs were increased compared with those of a conventional OLED without WO3 layer. Operating voltages of the devices with WO3 layer were significantly decreased because the WO3 layer facelifted the hole injection of the devices.

原文???core.languages.en_GB???
頁(從 - 到)160-164
頁數5
期刊Organic Electronics
53
DOIs
出版狀態已出版 - 2月 2018

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