具銀奈米粒與奈米碳管複合陰極之高效率場發射有機發光二極體

High efficient FEOLED with an Ag nanoparticle-carbon nanotube hybrid film as cathode

徐顥(Hao Hsu)

指導教授 ： 橫山明聰 ； 蘇水祥

義守大學/電機資訊學院/電子工程學系/碩士(2014年)

https://doi.org/10.6343/ISU.2014.00255

摘要

本論文旨以噴灑法沉積摻銀奈米粒之奈米碳管複合薄膜在金屬電極上製作高電流密度奈米碳管場發射電子源基板，並結合有機發光二極體(Organic Light Emitting Diodes, OLEDs），形成場發射式有機發光二極體(Field Emission Organic Light Emitting Diodes, FEOLEDs)，有效提高OLED發光效率。
對於奈米碳管場發射電子源基板特性的研究，主要著重於場發射特性的改善。利用蒸鍍法製作金屬電極作為陰極，使用噴灑法沉積奈米碳管(CNTs)於陰極上，而在CNTs中摻入銀奈米粒，能提升CNTs薄膜整體的導電性，進一步提升場發射特性。金屬電極分別採用銅、銀與鋁三種材料，結果顯示銅金屬電極以及銀奈米粒6.6 wt% 有較佳的場發射特性，電場在1.78 V/µm時有最高電流密度62.5 mA/cm2。 將上述場發射電子源基板應用於FEOLEDs元件中，有效的提升OLED發光亮度從5857 cd/m2至7386 cd/m2，發光效率也從9.327 cd/A提升至11.76 cd/A。

關鍵字

有機發光二極體 ； 場發射 ； 奈米碳管

並列摘要

In this study, we deposit Ag nanoparticles (Ag NPs)-doped carbon nanotube (CNT) suspension on metal by spray technique to produce a high current density carbon nanotube field emission electron source substrate. Field emission organic light-emitting diodes (FEOLEDs) are fabricated by combining the CNT field emission electron source with organic light-emitting diodes (OLEDs), which demonstrate a higher luminous efficiency than OLEDs.
The study of a CNT field emission electron source substrate is to enhance the field emission characteristics. First, Cu, Ag or Al is evaporated on the glass substrate to form the cathode. Ag NPs-doped multi-walled carbon nanotubes (MWCNTs) are deposited onto cathodes by spray technique. Doping Ag NPs into CNTs can improve the conductivity of CNTs film to further enhance the field emission properties. Experimental results reveal that a current density of 62.5 mA/cm2 at 1.78 V/μm has been obtained when Cu is used as a cathode and 6.6 wt% Ag NPs is doped into CNTs. When the above electron emitting source used as a substrate combines an OLED device to form a FEOLED, the luminance intensity is enhanced from 5857 cd/m2 to 7386 cd/m2 and the luminous efficiency is enhanced from 9.327 cd/A to 11.76 cd/A.

並列關鍵字

OLED ； field emission ； carbon nanotube

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