應用氧化鎢微奈米結構提高有機發光二極體之光萃取率研究

Enhancement of light extraction efficiency in organic light emitting diodes with WO3 micro/nano structure

游家志(CHIA-CHEN YU)

指導教授 ： 許佳振

國立中正大學/理學院/物理學系/碩士(2016年)

摘要

我們提出了一種新式，簡單的方法來製作提高有機發光二極體光萃取效率之微奈米結構，此種結構是建立於CsCl的潮解特性所產生的自組裝現象。其結構的大小與形貌可由CsCl、環境濕度、自組裝時間和溫度所控制，並可用來做為熱蒸鍍WO3微奈米結構層之遮罩。我們探討具有不同面積覆蓋比與厚度的WO3微奈米結構層之有機發光二極體發光效率的表現，結果發現具有最佳化的WO3微奈米結構之有機發光二極體的電流效率相對於參考元件可提升76%(島狀結構)和96%(孔洞結構)。

關鍵字

有機發光二極體 ； 氧化鎢 ； 光萃取薄膜

並列摘要

We present a new, simple method to improve internal light out coupling of organic light emitting diodes (OLED) by incorporating the micro- and nano- islands or network structures in the device. These structures were fabricated by a self-assembly technique based on the deliquescence of Cesium Chloride (CsCl) salt. The size and type of structures can be controlled by varying the CsCl film thickness, relative humidity, developing time and temperature. The fabricated structures can be used as a mask to transfer to Tungsten trioxide (WO3) hole injection layer by using thermal evaporation deposition. The light emitting performance of the WO3 patterned OLEDs was investigated. The maximum improvement of luminance efficiency of the WO3 patterned OLEDs can reach up to 76% for islands structures and 92% for networks structures compared with an unpatterned OLED.

並列關鍵字

OLED ； WO3 ； light extraction thin film

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