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Title: | 銅奈米顆粒堆疊緻密性及燒結特性之研究 Packing Density and Sintering Characteristic of Copper Nanoparticle |
Authors: | Wan-Yu Chung 鐘婉瑜 |
Advisor: | 廖英志(Ying-Chih Liao) |
Keyword: | 奈米銅顆粒,孔隙率,光燒結,吸光度,導電圖案, copper nanoparticle,porosity,photonic sintering,light absorption,conductive patterns, |
Publication Year : | 2018 |
Degree: | 碩士 |
Abstract: | 本論文主要探討如何提升奈米顆粒之間的堆疊密度,並藉由脈衝光技術進行燒結以達到緻密的高度導電薄膜。由於銅具備價格低廉以及對電遷移的抵抗性等優勢,可取代銀作為導電墨水的材料。然而其易氧化以及不易燒結,導致銅顆粒仍未被廣泛的應用於導電墨水中。我們希望能改善銅顆粒的燒結特性,嘗試在200nm的銅顆粒表面形成次氧化銅成分的突起物,藉由此小尺寸的次氧化銅達作為較易燒熔的媒介,並選取適當的還原劑,在脈衝光處理下同時還原並燒結銅薄膜。其中,我們觀察到整體薄膜仍存在孔隙,因此在墨水中加入50nm的氧化銅提升堆疊密度,同時增加吸光度,使銅薄膜在單次燒結能量下更有效轉換光能,並探討銅顆粒與氧化銅顆粒混和比例對燒結型態的影響,在最佳條件下,能夠以3.08J/cm2的燒結能量得到25%的純銅導電度,並應用於PET、PI等軟性基材上印製緻密的導電通路。展現銅奈米材料應用於軟性印刷電子元件的潛力。 In this thesis, we aimed to improve the packing density of copper nanoparticles and prepare copper films with compact structure by intense pulsed light (IPL) sintering. Copper has advantages of low cost and high electromigration resistance and it is a promising material to replace silver as conductive ink filler. However, copper is rarely used due to the problems of fast oxidation and high sintering temperature. To improve the sintering characteristic of copper nanoparticles, we try to synthesize small cuprous oxide (Cu2O) particles on the surface of copper nanoparticles of 200nm. The cupric oxide particles can fuse easily to form connection between large copper particles. With the presence of reductant, conductive copper film is sintered and reduced simultaneously by IPL. To fill in the voids between Cu nanoparticles in the copper film, cupric oxide (CuO) nanoparticles of 50 nm are added into ink to increase packing density. Moreover, the light absorption is improved. The effect of the Cu/CuO weight ratio on sintering is also discussed. The copper film shows conductivity as low as 25% of bulk copper under optimum condition with sintering energy at 3.08J/cm2. This sintering strategy enables copper nanomaterials to show considerable potential for flexible electronics. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/22173 |
DOI: | 10.6342/NTU201802003 |
Fulltext Rights: | 未授權 |
Appears in Collections: | 化學工程學系 |
Files in This Item:
File | Size | Format | |
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ntu-107-1.pdf Restricted Access | 3.14 MB | Adobe PDF |
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