| 摘要: | 發光二極體(light emitting diode，LED)是一種藉由半導體技術所製作出來的發光元件，此種元件是由Ⅱ-Ⅵ族，例如：ZnO、ZnSe，或是Ⅲ-Ⅴ族，例如：AlGaN、AlGaInP、InP、InGaN、GaN、 GaP等化合物半導體做為發光材料，並選擇適當的基材(GaN、Si、SiC、sapphire)做為磊晶時的基板，所製作的發光元件。LEDs具有以下優點：(1)小體積、(2)低耗電、(3)使用壽命長、(4)無熱輻射、(5)耐衝擊、(6)不易破損以及(7)環保。LEDs的應用也非常的廣泛，例如：(1)室外以及室內照明、(2)交通號誌、(3)顯示器背光源、(4)汽車燈以及(5)舞台燈光。 氧化鋅(ZnO)是一種應用面非常廣泛的材料，它除了是發光元件的其中一種材料，也廣泛的在太陽能電池、透明導電膜、壓電材料、紡織工業、醫學工業以及光催化材料方面被應用。在探討有關金屬奈米顆粒的區域性表面電漿子共振效應對ZnO薄膜的光電及發光特性研究較少，故提出此計畫。本計畫主要是以溶凝膠法/旋轉塗佈法製備出氧化鋅薄膜，並在其上成長銀奈米顆粒或是鉑奈米顆粒，藉此探討銀奈米顆粒以及鉑奈米顆粒對氧化鋅薄膜的透明導電膜之光電特性以及發光特性之影響。 本計畫『金屬(銀；鉑)奈米顆粒之區域性表面電漿子共振效應對溶凝膠研製之氧化鋅薄膜光電特性影響之研究』為一年期計畫。在執行面可以分成兩階段來研發： 第一階段：利用溶凝膠法，製備出ZnO奈米球，再利用旋轉塗佈的方式，均勻的塗佈在耐熱玻璃基板上使成為薄膜狀，再利用種子成長法及表面修飾法，將奈米銀或奈米鉑顆粒成長於ZnO表面。以XRD、SEM以及XPS確定是否為所需之奈米顆粒，做為下一階段的樣品。 第二階段：將前一階段製作出的樣品放入爐管，進行爐管真空或是氣氛控制熱處理。完成煅燒的試 片再使用以下儀器進行特性功能分析：CL(cathodoluminescence)、XRD、FE-SEM、HR-TEM、XPS、Raman、AFM、UV-Vis光譜儀、粒徑尺寸分析儀及霍爾效應量測儀進行分析。特別重要的是發光和透明導電雙重效率的評估。
Light-emitting diode (LED) is a solid state lighting device, made by the semiconductor technology. The light emitting materials are the compound semiconductors including the Ⅱ-Ⅵ compounds e.g., ZnO, ZnSe etc. and Ⅲ-Ⅴ compounds e.g., AlGaN, AlGaInP, InP, InGaN, GaN, GaP etc. Appropriate substrates, such as GaN, Si, SiC, sapphire, and glass for the epitaxial growth will be selected for the fabrication of LEDs. LEDs have many advantages, like the small size, low energy consumption, long lifetime, no heat radiation, high impact resistance, unbreakable, and environmental protection. LEDs have been widely applied, such as lighting of indoor and outdoor, traffic signal, display backlight, car lights and stage lighting. Zinc Oxide (ZnO) is one of the potential light emitting materials and has already wide applications on solar cell, TCO, piezoelectric materials, textile industry, medical industry, and photocatalytic materials. Few literatures discussed the effect of localized surface plasmon resonance of the metal nanoparticles on the enhancing optoelectronic properties of ZnO film. Sol-gel technique will be employed in this proposal to fabricate ZnO Nanospheres and more importantly the ZnO film by spin-coating process. This proposal entitled 『The effect of localized surface plasmon resonance of metal (Ag; Pt) nanoparticles on enhancing the optoelectronic performances of the sol-gel derived ZnO nanostructures』is an one-year project which consists two major steps: Step 1: ZnO nanospheres will be prepared by sol-gel technique, and followed by using the spin-coating method, a uniform ZnO film will coercibly condense on a substrate. Nanoparticles of Ag or Pt will be reduced on the surface of ZnO film by surface decorated method and seed-mediated growth technique. Step 2: The metal (Ag; Pt) nanoparticles decorated ZnO film on a glass substrate will be subject to the calcination in a tube furnace under vacuum or gas control system. Subsequent studies on structure, chemical composition, surface morphology, nanoparticles size and above all the optoelectronic performances in terms of light emitting and transparent conducting efficiencies. |
