改善刮刀塗佈互溶現象及雙發光層綠光有機發光二極體之製作

Improving the dissolution phenomenon for blade coating and fabrication of double emission layers green organic light-emitting diodes

楊弘榮(Jung-Yang Hung)

指導教授 ： 洪勝富

國立清華大學/電機資訊學院/電子工程研究所/碩士(2013年)

https://doi.org/10.6843/NTHU.2013.00766

摘要

本篇論文主要探討以刮刀塗佈製程製作雙發光層綠光有機發光二極體 ，雙發光層二極體比單發光層具有更好電子、電洞的復合效率，進而提高整體元件發光之效率，但因為刮刀塗佈是一種濕式溶液製程，所以塗佈的材料及溶劑的使用搭配更是必須費心去選擇，以避免元件的層與層間互溶，本篇論文中綠光元件主要是以ITO/ PEDOT/TAPC/TCTA:Ir(mppy)3=94:6/26DCzPPy:Ir(mppy)3=94:6 / TPBi的架構來探討，首先將各個層材料在不同溶劑做溶解度的測試，經測試選用不易溶解到下一層材料的溶劑來做塗佈的溶液，但因為有些材料溶解性非常的差，所以在本文嘗試用強溶劑與弱溶劑搭配成co-solvent方式去做測試，其效果能相當有限，最後發現三氯甲烷(chloroform)的使用，雖然對許多小分子材料溶解性非常強，在某些塗佈條件下，不僅不會溶解沖蝕底層的有機膜，反而更能穩定的成膜。

關鍵字

有機發光二極體 ； 刮刀塗佈 ； 雙發光層 ； 綠光

並列摘要

This thesis mainly discusses the blade coating process to produce double-emission layers green organic light-emitting diodes, the double emission layers has better ability to recombine electrons and hole than single emission layer, thus improving the efficiency of light-emitting diode, but because the blade coating is a solution process, so coating materials and the use of solvents is necessary to choice carefully to avoid component miscible between layers, the green device of this thesis component by ITO / PEDOT / TAPC / TCTC: Ir (mppy) 3 = 94:6 / 26DCzPPy:Ir (mppy) 3 = 94:6 / TPBi to discuss. First , we will test the solubility of each layer material in different solvents, through testing we use the solvent which is poorly soluble to the underlying material, but because some of the material is very poor solubility, so in this article we have tried to use strong solvent and poor solvent as co-solvent to do test, but it’s effect is limited , finally we found the chloroform, despite which is a strong solvent for many organic materials, but in some of blade coating conditions, the chloroform will not wash away the coating thickness of the bottom but produce more stable film.

並列關鍵字

organic light-emitting diodes ； blade coating ； double mission layers ； green light

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