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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 劉如熹(Ru-Shi Liu) | |
dc.contributor.author | Shin-Ying Lin | en |
dc.contributor.author | 林欣穎 | zh_TW |
dc.date.accessioned | 2021-06-15T13:04:22Z | - |
dc.date.available | 2016-08-02 | |
dc.date.copyright | 2016-08-02 | |
dc.date.issued | 2016 | |
dc.date.submitted | 2016-07-05 | |
dc.identifier.citation | [1] 維基百科編者, “發光二極體”.
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/50885 | - |
dc.description.abstract | 發光二極體之環保節能特點汰換白熾燈等傳統光源,應用範圍廣泛包含照明、背光顯示器與行動裝置等,被喻為二十一世紀最受矚目之技術。其中,智慧生活開展導致背光顯示器需求越益龐大,而普遍使用螢光粉材料皆存在半高寬過寬、色純度不高且色域面積小之問題,因此無法發展高品質之背光顯示器,故窄半高寬譜帶之量子點技術被視為新一波高色彩飽和度顯示器革命。
為開發適合用於背光顯示器之發光材料,選用膠體溶液化學法合成全無機式鈣鈦礦量子點CsPbX3 (X = Cl, Br, I )結構。藉Bruker D2 phaser與同步輻射中心之01C2實驗站,量測X光粉末繞射圖譜,並以TOPAS進行結構精算,由結果可知不同比例鹵素組成皆屬立方晶系之純相。亦透過同步輻射中心之17C1光束線收集X光近邊緣吸收結構數據,首次解析出鈣鈦礦量子點中鉛離子之氧化價數。再以場發射電子顯微鏡分析量子點之形貌為立方結構,且隨著鹵素組成變化對應晶面間距亦存有規律性。接著利用Tauc plot方法計算能隙數值,證實鈣鈦礦量子點因改變Br/I比例造成放光性質迥異之主要因素為Br與I離子其原本之能隙差異,而非顆粒大小造成之放光位移。此外,亦調控鈣鈦礦不同Br/I比例以探討放光波長變化趨勢,結果顯示等量改變之Br/I比例其放光呈對稱性分佈,配合精算結果得知隨I等比例增加及Br等比例減少將造成晶體膨脹,此趨勢影響CsPb(Br1-xIx)3之放光特性導致於特定區間放光位置相距甚遠,並呼應上述計算之能隙數值。故晶體結構膨脹、放光位置間隔與能隙數值差異為環環相扣關係。 本研究揭露全新藍、綠與紅色鈣鈦礦量子點之多孔洞二氧化矽奈米複合材料技術,有效避免離子交換問題,且提升材料之熱穩定性與光穩定性。並將此技術首次應用於白光發光二極體封裝,以NTSC與Rec. 2020標準計算封裝數據之色域覆蓋率分別達110%及80%以上,較傳統螢光粉高出甚多,代表使用鈣鈦礦量子點材料更符合現今廣色域背光顯示目標,凸顯量子點材料之重要與突破性。 | zh_TW |
dc.description.abstract | The thrust of my master thesis is on the synthesis of zero-dimension all-inorganic perovskite quantum dots(CsPbX3, X = Cl, Br, I) nanomaterials by colloidal solution methodas luminescent materials for light emitting diode(LED)backlight display applications. In this study, we tuned halogen composition ratio and investigated particle size and band gap difference to explain the spectral shift. We expect to find a correlation of the spectral shift and therefore establish a general explain. We also controlled the Br/I ratio of CsPb(Br1-xIx)3 and analyzed their different optical properties.
First, the 01C2 experiment station at the Synchrotron Radiation Research Center and Bruker D2 Phaser were used to measure X-ray powder diffraction patterns. We employed field emission electron microscopy to analyze the morphology of cubic quantum dots, and by turning the halogen composition corresponding with lattice spacing maintains regularity. We used Tauc plot to calculate the difference of band gap energy as shown by the spectral shift which we found to be caused by the different ratios of Br and I and not because of their particle size difference. Furthermore, we focused on this all-inorganic perovskite-type quantum dot which was applied for the first time for white light emitting diodes. With varying proportions of blue, green and red QD’s, a narrow, white light-emitting material was produced. Further, mesoporous silica particle loaded with perovskite-type quantum dots was also investigated to resolve problems ofion-exchange during LED packaging and thus, effectively enhance the material's thermal and light stability. These novel nanocomposite perovskite-type quantum dots were successfully applied for LED devices. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T13:04:22Z (GMT). No. of bitstreams: 1 ntu-105-R03223156-1.pdf: 7222618 bytes, checksum: b8dbd4ed4da70669437a73062026c1bd (MD5) Previous issue date: 2016 | en |
dc.description.tableofcontents | 口試委員審定書 I
誌謝 II 摘要 III Abstract IV 總目錄 V 表目錄 XII 第一章緒論 1 1.1 III-V族發光二極體介紹(Light-emitting diode, LED) 2 1.1.1 白光發光二極體(White light-emitting diodes; WLEDs) 4 1.1.2 白光發光二極體照明與背光應用 6 1.1.2.1 白光發光二極體照明技術 7 1.1.2.2 發光二極體背光技術 8 1.1.3發光二極體背光顯示應用 9 1.1.3.1 色彩簡介 11 1.1.3.2 CIE 1931色度座標 12 1.1.3.3 色域面積(Color gamut) 13 1.1.3.4 顏色純度 15 1.2 發光材料介紹 16 1.2.1 螢光粉材料特性探討 17 1.2.2 半導體量子點材料特性探討 18 1.3 奈米材料原理介紹(Nanomaterials) 19 1.3.1 表面積效應 20 1.3.2 物性變化 20 1.4 半導體量子點材料之原理(Quantum dots) 21 1.4.1 量子侷限效應(量子尺寸效應) 21 1.4.2 量子光學性質探討 24 1.4.3 量子點材料之量子效率探討(Quantum yield) 24 1.4.4 II-VI族、III-V族以及I-III-VI族半導體量子點介紹 25 1.5鈣鈦礦介紹(Perovskite) 26 1.5.1 有機無機式鈣鈦礦量子點探討(Hybrid perovskite) 27 1.5.2 全無機式鈣鈦礦量子點探討(Inorganic perovskite) 28 1.5.3全無機式鈣鈦礦量子點應用於白光發光二極體 29 1.6 研究動機與目的 31 第二章實驗步驟與儀器分析原理 34 2.1化學藥品 35 2.2量子點製備方法 35 2.2.1全無機式鈣鈦礦量子點合成製備 36 2.2.2全無機式鈣鈦礦量子點多孔洞奈米複合材料製備 37 2.3 儀器鑑定 38 2.3.1 光學鑑定 39 2.3.1.1紫外光-可見光(UV-Visible)吸收光譜儀 39 2.3.1.2螢光光譜儀(photoluminescence spectrometer) 41 2.3.1.3 X射線吸收光譜(X-ray absorption spectroscopy, XAS) 42 2.3.1.4 絕對量子效率儀分析 44 2.3.1.5 熱淬滅螢光強度測量 45 2.3.2 結構鑑定 46 2.3.2.1 X光繞射分析與結構精算(Pawley Method) 46 2.3.2.2 穿透式電子顯微鏡(transmission electron microscopy, TEM)搭配X-ray能譜分析儀(EDS) 49 第三章結果與討論 52 3.1 全無機式鈣鈦礦量子點之鹵素調控特性分析 52 3.1.1CsPbX3 (X = Br, I )之晶體結構 53 3.1.2 CsPb(Br1-xIx)3之X光繞射鑑定與結構精算 54 3.1.3CsPb(Br1-xIx)3之X光吸收近邊緣結構(XANES) 58 3.1.4 CsPb(Br1-xIx)3之穿透式電子顯微鏡形貌鑑定與元素分析 58 3.1.5CsPb(Br1-xIx)3之光譜分析 61 3.1.5.1CsPb(Br1-xIx)3之光激光譜分析(PL) 62 3.1.5.2CsPb(Br1-xIx)3之吸收與能隙(band gap)分析 63 3.1.5.3 CsPb(Br1-xIx)3之量子效率量測 66 3.1.6CsPb(Br1-xIx)3之晶格變化與光譜對稱之機制探討 67 3.2全無機式鈣鈦礦量子點螢光生命週期分析 68 3.3全無機式鈣鈦礦量子點應用於白光發光二極體 72 3.3.1藍光晶片搭配無機鈣鈦礦之紅色量子點與黃色螢光粉封裝測試 74 3.3.2藍光晶片搭配無機鈣鈦礦之綠色量子點與紅色螢光粉封裝測試 76 3.3.3藍光晶片搭配無機鈣鈦礦之綠色與紅色量子點封裝測試 78 3.3.4鈣鈦礦量子點之多孔二氧化矽奈米複合材料發展(Mesoporous silica) 79 3.3.5鈣鈦礦量子點之多孔洞複合材料封裝測試 83 第四章結論 86 參考文獻 88 期刊發表 93 專利 94 | |
dc.language.iso | zh-TW | |
dc.title | 無機鈣鈦礦量子點之合成、特性分析與應用 | zh_TW |
dc.title | Synthesis, Characterization and Applications of All-Inorganic Perovskite Light-emitting Semiconducting Quantum Dots | en |
dc.type | Thesis | |
dc.date.schoolyear | 104-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 張煥宗(Huan-Tsung Chang),刁維光(Wei-Guang Diau),蔡宗良,何麗貞 | |
dc.subject.keyword | 無機鈣鈦礦量子點,發光二極體,背光顯示,鹵素調控,鈣鈦礦量子點之多孔洞奈米複合材料, | zh_TW |
dc.subject.keyword | Inorganic perovskite quantum dot,Light emitting diode,backlight display,Tuning halogen ratio of CsPb(Br1-xIx)3,Tuning halogen ratio of CsPb(Br1-xIx)3,Mesoporous silica perovskite QDs, | en |
dc.relation.page | 94 | |
dc.identifier.doi | 10.6342/NTU201600437 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2016-07-06 | |
dc.contributor.author-college | 理學院 | zh_TW |
dc.contributor.author-dept | 化學研究所 | zh_TW |
顯示於系所單位: | 化學系 |
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