高分子發光二極體照明之全塗佈製程研發

本論文探討如何使用全溶液製程製作有機發光二極體元件(Organic Light- Emitting Diode, OLED)，全溶液製程的最大的挑戰在於如何讓低功函數的陰極在不使用真空鍍膜的方式被製造出來。本論文提出在鋁電極上塗佈一層5奈米的聚乙烯亞胺(Polyethylenimine, PEI)薄膜改質層，降低此複合電極(塗佈著PEI的鋁)的真空能級(vacuum level )，有效達到功函數下降的效果。利用此結構製作陽極為Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PH1000)，陰極為塗有PEI薄膜的鋁電極，發光層為(Poly[9,9-dioctylfluorenyl-2,7-diyl]-End capped with N,N-Bis(4-methylphenyl)-aniline)(PFO)，電洞傳輸層(HTL)與陽極同材料，僅PEDOT和PSS的參混比例不同，結構為PH1000 / HTL / PFO / PEI / Al的OLED；同時針對未來以捲對捲全塗佈製程量產OLED為目標，設計了可以在捲對捲塗佈機上使用的自調式刮刀塗佈系統，成功均勻地塗佈出長1.5公尺寬7.5公分的poly(3-hexylthiophene-2,5-diyl) (P3HT)，驗證了捲對捲自調式刮刀塗佈的有效性。

關鍵字

有機發光二極體；功函數；全溶液製程；自調式刮刀塗佈；捲對捲塗佈機台

並列摘要

In this paper, we provide how to use all-solution process to make organic light-rmitting diode(OLED). The biggest challenge in all-solution process is how to coat cathode with low work function without vacuum chamber. We present a method to reduce the work function of aluminum by coating a thin film of polyethylenimine, shifting the vacuum level of aluminum coated with poly -ethylenimine to make a low work functin electrode. We make an OLED which anode is Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)(PH1000), emitting layer is (Poly[9,9-dioctylfluorenyl-2,7-diyl]-End capped with N,N-Bis(4-methylphen -yl)-aniline)(PFO), cathode is aluminum coated with polyethylenimine, and hole transporting layer is the same material as anode but different ratio from PEDOT and PSS. The structure of OLED is PH1000 / HTL / PFO / PEI / AL. We also design a self-adjusting blade coating system for roll-to-roll coating machine to manufacture OLED by all-solution process, and successfully make a uniform poly(3-hexylthiophene-2,5-diyl) (P3HT) sample with size 1.5 meter cross 7.5 centimeter. By these we can prove the flexibility of manufacturing OLED by roll-to-roll coating machine with self-adjusting blade coater.

並列關鍵字

organic light-emitting diode(OLED) ； work function ； all-solution process ； self-adjusting blade coating ； roll-to-roll coating machine

參考文獻

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高分子發光二極體照明之全塗佈製程研發

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