English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 78728/78728 (100%)
造訪人次 : 33353104      線上人數 : 463
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋


    請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/81708


    題名: 水溶液法製備CsxPbyBrz鈣鈦礦系材料之研究;The Synthesized and Analysis of CsxPbyBrz Perovskites via Water-based Process
    作者: 楊子萱;Yang, Tzu-Hsuan
    貢獻者: 機械工程學系
    關鍵詞: 鈣鈦礦;水溶液;粉末;Perovskite;aqueous;Powder
    日期: 2019-08-19
    上傳時間: 2019-09-03 16:39:14 (UTC+8)
    出版者: 國立中央大學
    摘要: 全無機鈣鈦礦(All-inorganic Pervoskite)晶體材料不僅具備相當優異的光吸收係數、電子遷移率、色純度以及可調式發光波長的光電特性之外,其可溶液製備更是促使鈣鈦礦材料在太陽能電池、量子點以及發光二極體等應用上具有極大發展潛力的優勢之一。
    本研究首次提出「水溶液法(Water-based Process)」,在室溫下以“水”為溶劑,藉由調整系統內CsBr及Pb(NO3)2莫耳濃度製備出CsxPbyBrz鈣鈦礦系之粉末。並以XRD、SEM以及EDS分析其晶體結構以及合成機制,再佐以UV-Vis、UPS及PL分析各粉末的光學性質。綜合其結果顯示,在CsBr不足的情況之下,可合成出間接能隙為3.1eV且光致發光為紫光及橘光之二維板狀CsPb2Br5粉末;而隨著CsBr濃度逐漸提升,則會形成CsPb2Br5及CsPbBr3兩相共存之過渡帶,其表面會具有奈米級CsPbBr3量子侷限效應的綠光產生;而當CsBr為富有相時,即可合成出高品質、直接能隙為2.3eV之三維單斜CsPbBr3粉末。
    最後,本研究不僅通過改變CsX鹵素原子製備出多種鈣鈦礦粉末之外,亦選取最低成本且高品質的CsPbBr3鈣鈦礦粉末,以製備太陽能電池、發光二極體及可撓式發光元件為目標,成功將粉末應用於單源熱蒸鍍及噴霧法等多種薄膜製程當中,不僅可以有效地改善傳統製程中有機溶劑對環境的汙染,亦可避免高沸點油性配體對商業應用上所造成之限制,達到低成本、大面積、高產率且環保無汙染等訴求,展現出水溶液法製備鈣鈦礦之技術無限的發展潛力。
    ;In this study, we report for the first time the synthesized of perovskite powder by “ water-based process ”. It is not only quite simple at room temperature, but also through the "water" as a solvent without any high boiling organic solvents and ligands, achieving low-cost, large-area, mass production and environmentally friendly.
    CsxPbyBrz powder was obtained by systematically varying the molar ratios of CsBr/Pb(NO3)2 in the deionized water. We used the XRD, SEM and EDS to evaluate the powders CsxPbyBrz crystal structural and chemical composition. Therefore, we combined our experimental observations found that the chemical reaction mechanism is related to “ Solubility equilibrium ” , so that CsBr in the system can reach the saturated state, thereby inhibiting the degradation reaction of CsPbBr3 in water.
    In addition, we also use the UV-Vis, UPS and PL spectrum to analysis the optical and electrical properties. The results show that with the increase of CsBr concentration, the influence is gradually changed from indirect energy gap 3.1eV CsPb2Br5 to direct energy gap 2.3eV CsPbBr3. Moreover, the crystal growth mechanism for the water-based process was investigated by TEM analysis.
    Finally, our research team successfully applied this powder to single-source evaporation and spray-coated technique, and also prepared various perovskite powders by changing the halogen atoms of CsX, demonstrating the unlimited development potential of this water-based process synthesized perovskite technology.
    顯示於類別:[機械工程研究所] 博碩士論文

    文件中的檔案:

    檔案 描述 大小格式瀏覽次數
    index.html0KbHTML167檢視/開啟


    在NCUIR中所有的資料項目都受到原著作權保護.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 隱私權政策聲明