題名: CM6@Zn-MOF奈米片的人工光補系統, 大幅提升光電效能
其他題名: Artificial light harvesting system of CM6@Zn-MOF nanosheets with highly enhanced photoelectric performance
作者: 賴信汝
關鍵字: 金屬有機框架(MOFs)
螢光共振能量轉移(FRET)
人工光能收集系統
Coumarin 6
光電流響應
Metal–Organic Frameworks (MOFs)
Förster Resonance Energy Transfer (FRET)
Artificial Light-Harvesting System (ALHS)
Photocurrent Response
系所/單位: 材料科學與工程學系, 工程與科學學院
摘要: 摘 要 二維鋅金屬有機框架(Zn-MOF),可以應用在人工光能收集系統上,也就是模仿植物行光合作用來收集光能的技術。設計了一種結構特殊的Zn-MOF,利用了兩種有機配體(H₂mpda 和 tib)去合成這個材料,然後用原子力顯微鏡(AFM)確認這個材料的厚度大概只有5奈米。用超音波剝離技術,成功做出表面積很大的Zn-MOF奈米片。這些奈米片的特點是它們的螢光發射光譜跟CM6的紫外-可見光吸收光譜重疊,因此可以進行一種叫做螢光共振能量轉移(FRET)的機制,這個機制可以讓能量從一個分子傳遞到另一個分子,應用在人工光能收集系統(ALHS)上非常有潛力。跟傳統單晶的Zn-MOF相比,這種新型的材料CM6@Zn-MOF(2)有更大的比表面積(41 m²/g)、更高的量子產率(約30.56%)、更窄的能隙(2.87 eV),而且吸收光的範圍可以延伸到可見光區的綠光。更重要的是,它有很好的光電表現,像是開關電流比(21倍)和光電流密度都比純Zn-MOF還要高。這篇研究提出了一種新材料,不但可以有效收集光能、轉換光成電,還為未來在光學裝置和電化學材料的應用上,打下了理論基礎。
Abstract A two-dimensional zinc metal-organic framework (Zn-MOF) can be applied in artificial light-harvesting systems, which mimic the photosynthesis of plants to collect solar energy. A specially structured Zn-MOF was designed using two organic ligands (H₂mpda and tib) to synthesize this material. Atomic force microscopy (AFM) confirmed that the thickness of the material is approximately 5 nanometers. Using ultrasonic exfoliation, Zn-MOF nanosheets with a large surface area were successfully produced. These nanosheets are characterized by the overlap between their fluorescence emission spectrum and the UV-visible absorption spectrum of CM6, enabling a mechanism known as Förster Resonance Energy Transfer (FRET). This mechanism allows energy to be transferred from one molecule to another, making it highly promising for applications in artificial light-harvesting systems (ALHS). Compared with traditional single-crystal Zn-MOFs, this novel material, CM6@Zn-MOF(2), possesses a larger specific surface area (41 m²/g), higher quantum yield (approximately 30.56%), narrower band gap (2.87 eV), and its light absorption range extends into the visible green region. More importantly, it exhibits excellent photoelectric performance, such as a higher on/off current ratio (21 times) and greater photocurrent density than pure Zn-MOF. This study introduces a new material that not only effectively captures light energy and converts it into electricity but also lays a theoretical foundation for future applications in optical devices and electrochemical materials.
學年度: 113學年度第二學期
開課老師: 駱, 榮富
課程名稱: 專題討論
系所: 材料科學與工程學系, 工程與科學學院
分類:工科113學年度

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