臺灣博碩士論文加值系統

異質接面發生於兩種不相同材料的交界，我們經常使用其特殊的電子和光電性質來設計元件。在這裡，我們設計了一種三重異質結構，將石墨烯夾入p型的聚(3-己烷噻吩)(P3HT)和n型的氧化鋅奈米粒子(ZnO NPs)之間。由於石墨烯的極薄性質，熱平衡中，兩層介面中的電場會穿過石墨烯互相影響兩邊半導體的光電性質。
在本篇論文中，我們仔細地探討了三層物質在雷射照射下互相影響的情形，藉由研究的結果，我們演示了我們的樣品可藉由一道光當成背景來調變整個樣品對於另外一道光的靈敏度，另外，由於我們使用的兩個半導體材料有著不同的吸收波段，造成我們在照射不同波段的雷射時，我們的元件會有上升及下降兩種不同的光電反應，藉由這種性質，我們演示了我們的元件對於不同顏色的光有著可辨識性，並且能夠對於從紫外光到500奈米附近的可見光都有著光電反應。
我們成功地討論了這樣特殊的異質結構，並且演示了這個結構可以應用於未來光電領域的可能性。

Heterostructure, the interface between two non-identical materials are widely used efficient strategy to engineer the electronic and optoelectronic devices. Herein, we have designed a triple heterojunction using graphene sandwiched by p- and n-type semiconductors, P3HT and ZnO. Owing to the atomically thin nature of graphene, the electric field generated at the triple interface in thermal equilibrium can penetrate through graphene to interfere the optoelectronic properties of the semiconducting layers. The existence of unique Dirac cone at the junction gives rise several not yet realized properties. The output performance of such heterojunction based phototransistor can be tuned optically, where external photons can be used as a gate to the detection of other photons carrying different energies. In addition to the broad bandwidth of photon detection, we have demonstrated an efficient color sensitivity of the heterostructure. In the viewpoint of robust global demand for novel functional materials and devices, our strategy paves an important step towards the realization of high performance, multifunctional optoelectronic devices.

口試委員會審定書 I
致謝 II
中文摘要論文 IV
Abstract V
Contents VI
List of Figures VIII
Chapter 1 Introduction
Introduction 1
Reference 3
Chapter 2 Theoretical Background
2.1 Heterojunction 6
2.2 Graphene: 2D Material 8
2.3 Zinc Oxide Nanoparticles & Poly (3-hexylthiophene) 12
Reference 13
Chapter 3 Experimental Details
3.1 Copper Polishment System 16
3.2 Chemical Vapor Deposition System 18
3.3 Thermal Evaporation 20
3.4 Current-Time (I-T) measurement 22
3.5 ADATA Aura RGB Bulb 24
3.6 CIE Diagram 25
3.7 Material Synthesis 26
3.8 Device Fabrication 29
Reference 31
Chapter 4 Results and Discussion
4.1 Device Structures and Characteristics of Component Materials 32
4.2 Responsivity of Device Performance 35
4.3 Responsivity of One Light under the Other One Keep Shining 40
4.4 Application 47
Reference 50
Chapter 5 Conclusion
Conclusion 52

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