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研究生: 葉原良
Yeh, Yuan-Liang
論文名稱: 表面鈍化在鈣鈦礦發光二極體的應用
The application of surface passivation on perovskite LEDs
指導教授: 趙宇強
Chao, Yu-Chiang
口試委員: 許經夌
Hsu, Ching-Ling
駱芳鈺
Luo, Fang-Yu
趙宇強
Chao, Yu-Chiang
口試日期: 2023/06/26
學位類別: 碩士
Master
系所名稱: 物理學系
Department of Physics
論文出版年: 2023
畢業學年度: 111
語文別: 中文
論文頁數: 57
中文關鍵詞: 表面鈍化掌性萘乙胺
英文關鍵詞: surface passivation, chirality, 1 --(1 Naphthyl)ethylamine
DOI URL: http://doi.org/10.6345/NTNU202300872
論文種類: 學術論文
相關次數: 點閱:90下載:13
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  • 此論文分作兩部分,第一部分是表面鈍化在鈣鈦礦發光二極體的應用,第二部分為將掌性材料萘乙胺引入鈣鈦礦結構的嘗試。
    在第一部分中,將以苄胺(benzylamine)及吡啶(pyridine)作為用於表面鈍化藥品,對鈣鈦礦進行表面鈍化。受到苄胺表面鈍化的鈣鈦礦薄膜,載子生命期由112.9116ns提升到了167.4956ns,光致發光量子產率由9.40%提升到了13.68%,發光二極體外部量子效率部分也有得到提升。在吡啶方面,受到吡啶表面鈍化的鈣鈦礦薄膜,其載子生命期亦提升到了156.7662ns,光致發光量子產率與發光二極體的外部量子效率有整體提升的現象,但提升的幅度不隨吡啶濃度提升而增加。受到芐胺表面鈍化的鈣鈦礦薄膜,在掃描式電子顯微鏡下呈現平坦化的現象。由X光繞射光譜得知,隨芐胺的濃度提升,鈣鈦礦中開始出現n=1的結構,而造成鈣鈦礦的發光強度下降。不過在發光二極體的量測上也發現,芐胺的表面鈍化會使電流密度下降,且下降的幅度比發光強度還大,因此造就了發光效率的提升。
    第二部分旨在利用自行製備的溴化萘乙胺(NEABr),製做具有掌性的鈣鈦礦薄膜,再對其光二色性及圓偏振光致發光特性進行量測。經過一連串實驗,實驗結果與文獻有諸多差異。針對文獻中,製備鈣鈦礦薄膜須將基板存放於手套箱內七天後再量測的作法,進行實驗與探究。鈣鈦礦薄膜的光二色性光譜在保存於手套箱內的七天內,特徵峰的強度會有波動的情形,並在第七天的時候,特徵峰的強度會達到穩定的狀態。

    This thesis is divided into two main topics, the first discusses the application of surface passivation on perovskite light emitting diodes (PLEDs); the other is the attempt to incorporate the chiral moecule 1-(1-Naphthyl)ethylamine (NEA) into the structure of perovskite.
    The carrier lifetime of the perovskite film passivated by benzylamine was improved from 112.9116 ns to 167.4956 ns, the photoluminescence quantum yield was improved from 9.40% to 13.68%, and the external quantum efficiency of the light-emitting diode was also improved. In the case of pyridine, the carrier lifetime of the perovskite film passivated by pyridine was also improved to 156.7662 ns. However, no regularity was found in the change of photoluminescence quantum yield with the increase of surface passivation drug concentration, and the quantum efficiency of the light-emitting diode showed only a slight improvement, no trend was found with the change of concentration either.
    The second part aims to fabricate chiral perovskite films with 1-(1-Naphthyl)ethylamine bromide (NEABr) prepared by myself, then measure their circular polarized luminescence and chiral dichroism properties to reproduce the experimental results in literature. However, after a series of experiments, there were many differences from the literature. Through experiment focusing on the method in literature, which requires storing the substrate in the glove box for 7 days before measuring. It turns out that storing the film for 7 days makes the CD spectra reach a steady peak value, which is easier to read.

    第一章 緒論 1 1.1前言 1 1.2準二維鈣鈦礦 2 1.3表面鈍化 (surface passivation) 3 1.4掌性鈣鈦礦與旋光性 4 1.5研究動機 4 第二章 實驗原理 6 2.1發光二極體 6 2.2量子效率 7 2.3光致發光 7 2.4時間解析光致發光(Time-resolved photoluminescence, TRPL) 7 2.5光致發光量子產率(photoluminescence quantum yield, PLQY) 8 2.6旋光與CD、CPL 9 第三章 實驗儀器與架構 11 3.1實驗儀器 11 3.1.1手套箱 11 3.1.2紫外線臭氧清洗機(UV ozone) 11 3.1.3旋轉塗布機(spin coater) 11 3.1.4加熱板(hot plate) 12 3.1.5蒸鍍機(evaporator) 12 3.1.6光致發光光譜儀(photoluminescence) 12 3.1.7吸收光譜儀(absorption) 12 3.1.8電致發光光譜儀(electroluminescence) 12 3.1.9 FS5螢光分光光度計 13 3.1.10 掃描式電子顯微鏡(scanning electron microscope,SEM) 13 3.1.11 X光繞射儀(X-ray diffractometer, XRD) 13 3.1.12 光二色性光譜儀(chiral dichroism spectrophotometer)、圓偏振光光譜儀(circular polarized luminescence spectrophotometer) 14 3.2表面鈍化對鈣鈦礦的影響 14 3.2.1鈣鈦礦薄膜製成 14 3.2.2蝕刻ITO基板 15 3.2.3清洗ITO基板 16 3.2.4鈣鈦礦發光二極體製程 16 3.3掌性分子萘乙胺在鈣鈦礦中的引入 18 3.3.1溴化萘乙胺(NEABr)的合成 18 3.3.2溴化萘乙胺的鑑定 19 3.3.3含溴化萘乙胺鈣鈦礦薄膜的製作 19 第四章 實驗結果與討論 20 4.1表面鈍化對鈣鈦礦的影響 20 4.1.1鈍化藥品對鈣鈦礦的影響 20 4.1.2表面鈍化在鈣鈦礦發光二極體的應用 24 4.2掌性分子萘乙胺在鈣鈦礦中的引入 36 4.2.1 溴化萘乙胺的合成 36 4.2.2 溴化萘乙胺的鑑定 36 4.2.3含溴化萘乙胺鈣鈦礦薄膜的製作 38 第五章 結論 53 5.1表面鈍化對鈣鈦礦的影響 53 5.2掌性分子萘乙胺在鈣鈦礦中的引入 54 參考文獻 55

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