本研究開發一量子點膠材，並成功以具405奈米波長雷射之光造型式3D列印機台，列印尺寸約5至5.8毫米之量子點透鏡。調整膠材配方後，可使製備之量子點薄膜轉換效率提升至原先配方兩倍左右。將量子點透鏡做為光源量測各角度之光強分布，其可視角比傳統SMD封裝結構之量子點發光二極體光源提升約36%。在20毫安培電流操作下，量子點透鏡之表面溫度比傳統量子點發光二極體低約10℃，且溫度分布亦較均勻。推測是量子點透鏡之3D結構可以避免膠材與晶片接觸，使熱能不易從晶片傳遞至膠材，進而降低表面溫度。於可靠度測試中，量子點透鏡有比傳統量子點發光二極體長十倍以上的操作壽命。更進一步，利用化學氣相沉積在量子點透鏡的表面鍍覆一層水、氧阻隔層，可使操作壽命再提升約1.5倍。最後，以量子點鏡片作為光源之色域面積可以提升至美國國家電視系統委員會（NTSC）定義之顯色色域面積約130%。

In this study, an UV-curable QD resin is prepared and QD lens in size of 5 to 5.8 mm are printed with stereolithographic (SLA) three-dimensional (3D) printer equipped 405 nm wavelength laser. The luminescence efficiency of a QD film can increase about two times higher than it was with a selected QD resin. QD lens shows about 36% wider viewing angle than traditional SMD QD light-emitting diode (QD-LED). QD lens has 10℃ lower in surface temperature and more uniform temperature distribution than QD-LED. Because the lens structure can avoid a direct contact with LED chip, the thermal energy may not be easily transferred to QD resin. In reliability test, QD lens has 10 times longer in device lifetime (T50) than QD-LED. The T50 of QD lens can be further improved 1.5 times longer by coating with parylene as a gas barrier layer. The color gamut of display equipped with QD lens as lighting source has around 130% NTSC standard.

中文摘要 2
Abstract 3
誌謝 4
Contents 5
Chapter 1 Introduction 7
Chapter 2 Literature Review 9
2.1 Optical properties of quantum dot (QDs) 9
2.2 Development of quantum dot light-emitting diode (QD-LED) 13
2.2.1 Introduction of QD-LED 13
2.2.2 Influence of QD-LED encapsulation structure on device optical and thermal characteristics. 17
2.3 Additive method 3D printing and nanomaterials 23
2.3.1 Introduction of 3D printing 23
2.3.2 Integration of QDs and 3D printing system 25
Chapter 3 Experimental 31
3.1 Preparation of UV-curable QD resin. 31
3.2 Design of 3D structure. 31
3.3 3D Fabrication process. 32
3.4 Light intensity distribution and surface temperature analysis of QD lens and QD-LED. 33
3.5 Reliability test of QD lens and QD-LED. 34
3.6 Characterization. 34
Chapter 4 Results and Discussion 35
4.1 Selection of UV-curable polymer QD resin for 3D printing process. 35
4.2 Characterization of QD lens 44
4.3 Light intensity distribution and surface temperature of QD lens 51
4.4 Reliability of on-chip QD-LED and QD lens 57
4.5 Demonstration of white light emitting QD lens 67
Chapter 5 Conclusions 71
Appendix 72
Appendix 1. Synthesis of alloy low cadmium (Cd) QDs. 72
Appendix 2. Comparison of core/shell with alloy low Cd QDs in device stability and development of alloy slow Cd QDs mass production. 75
References 78

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