不同熱處理製程對於全無機混合鹵化物鈣鈦礦 藍色發光二極體之研究

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譚喻心(Yu-Xin Tang) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

不同熱處理製程對於全無機混合鹵化物鈣鈦礦藍色發光二極體之研究
(The Study of Different Heat Treatment Process of Inorganic Mixed Halide Perovskite for Blue Light-Emitting Diodes)

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至系統瀏覽論文 (2026-7-1以後開放)

摘要(中)

藍光鈣鈦礦
LED可由氯化物和溴化物混合物製備。此外，可以通過莫爾
比來調節發光波長。然而，混合 Cl/Br鈣鈦礦容易因結構缺陷而引起相分離，
從而導致光致發光的量子效率降低以及藍光鈣鈦礦 LED波長紅移的不穩定性。
因此藍光鈣鈦礦 LED的效率遠低於綠光和紅光。
而目前大多數藍光鈣鈦礦 LED都添加了有機成分，以減少結構缺陷並
提高 LED效率；但有機鈣鈦礦 LED很容易受環境影響而導致效率的不穩定使
元件壽命減少，而全無機鈣鈦礦 LED相對而言穩定性較高。
出於商業考慮，本研究介紹了全無機藍光鈣鈦礦
LED製程，通過使用雙源
順序熱蒸發和基板加熱來製備全無機混合鹵化物 CsPbBr3-xClx薄膜。此外，本
研究還比較了不同熱處理和非熱處理真空熟成的方法。對 CsPbBr3-xClx薄膜進
行不同溫度和時間的熱處理和光致發光量子效率的比較，本研究最後在兩種不
同製程條件下達到最佳效率：：(i)在 300℃退火 40分鐘，波長 476nm亮度達到
1537nits (ii)未退火且老化 68小時，波長 476nm亮度達到 178.6nits。此研究
實現節能並在未來能有效應用於軟性基板上。

摘要(英)

Blue perovskite LEDs can be prepared by chloride and bromide mixture. Moreover, the wavelength of light emission is able to adjust by molar ratio. However, mixed Cl/Br perovskite easily phase separation induce by structure defect, which lead the quantum efficiency of photoluminescence reduction and the instability for blue perovskite LEDs wavelength shift. So blue perovskite LEDs efficiency is much lower than green and red light.
So far, most of the blue perovskite LEDs have added organic components for structure defect reduction and improved LEDs efficiency; however, moisture induced device lifetime degradation might easily occur on organic blue perovskite LEDs and less impact on all-inorganic blue perovskite LEDs. For commercial concern, This study introduced all-inorganic blue perovskite LEDs process by using dual-source sequential thermal evaporation and substrate heating to prepare all-inorganic mixed halide CsPbBr3-xClx thin films. Besides, we also compare different heat treatment and non-heat treatment vacuum aging methods. Based on CsPbBr3-xClx films with different temperature and duration time thermal process and photoluminescence quantum efficiency compare, we consult the process condition with the components (i) annealed at 300°C for 40 minutes, wave length 476nm brightness reached 1537 nits; (ii) non-annealed and with 68hrs aging, wave length 476nm brightness reached 178.6 nits. Based on our study to achieve energy saving and can be effectively applied to flexible substrates in the future.

關鍵字(中)

★ 鈣
★ 鈦
★ 礦

關鍵字(英)

★ Perovskite

論文目次

目錄
第一章
緒論 1
1-1 前言..................................................................................................................... 1
1-2 鈣鈦礦介紹......................................................................................................... 2
1-3 鈣鈦礦應用......................................................................................................... 3
1-3-1 發光二極體.................................................................................................. 3
1-3-2 太陽能電池.................................................................................................. 5
1-3-3 光電感測器.................................................................................................. 7
1-4 鈣鈦礦薄膜製備方式......................................................................................... 8
1-4-1 溶液旋塗法.................................................................................................. 8
1-4-2 熱蒸鍍法.................................................................................................... 12
1-5 鈣鈦礦藍光LED .............................................................................................. 17
1-5-1 鈣鈦礦藍光LED的發展 .......................................................................... 17
1-5-2 藍光PeLED的改進 .................................................................................. 20
1-6 研究動機........................................................................................................... 26
第二章
實驗方法 27
2-1 實驗藥品及儀器............................................................................................... 27
2-1-1 實驗藥品.................................................................................................... 27
2-1-2 實驗儀器.................................................................................................... 27
2-2 實驗步驟........................................................................................................... 29
2-2-1 基板清潔.................................................................................................... 29
2-2-2 電子傳輸層-氧化鋅(ZnO)製備 ................................................................ 29
2-2-3 雙源熱蒸鍍製程........................................................................................ 30
2-2-4 製程後熱退火............................................................................................ 30
2-2-5 碳膠刮塗.................................................................................................... 30
2-3 實驗儀器分析介紹........................................................................................... 31
2-3-1 X-射線繞射儀(X-ray Diffractometer, XRD) ............................................. 31
v
2-3-2 紫外線∕可見光分光光譜儀(Ultraviolet -visible spectroscopy, UV-Vis) .............................................................................................................................. 31
2-3-3 掃描式電子顯微鏡(Scanning Electron Microscope, SEM) ..................... 31
2-3-4 紫外光電子能譜儀(Ultraviolet Photoelectron Spectroscopy, UPS) ........ 32
2-3-5 熱示差掃描分析儀(Differential scanning calorimetry, DSC) .................. 32
2-3-6 輝度計(Luminance Colorimeter) ............................................................... 32
第三章
第三章結果與討論結果與討論........................................................................................................................................................................................................ 33
3-1 CsPbBr3-xClx薄膜熱分析 ............................................................................... 33
3-1-1 基板加熱順序蒸鍍CsPbBr3-xClx薄膜 ..................................................... 33
3-1-2 DSC分析 .................................................................................................... 36
3-2 元件結構........................................................................................................... 37
3-2-1 UPS分析 .................................................................................................... 37
3-2-2 藍光LED元件 .......................................................................................... 38
1-3 不同熱處理對主動層的影響........................................................................... 39
3-3-1 350°C和300°退火對基板加熱CsPbBr3-xClx薄膜的影響 ..................... 39
3-3-2 比較400°C、350°C、300°C退火後的元件效率 ................................... 44
3-3-3 在無基板加熱下進行300°C退火40分鐘 ............................................. 48
3-4 熟成對主動層的影響....................................................................................... 51
3-4-1 比較真空下熟成不同時間........................................................................ 51
第四章
第四章結論結論................................................................................................................................................................................................................................ 56
參考文獻
參考文獻............................................................................................................................................................................................................................................ 57

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[34]曲芸萱曲芸萱,「雙源順序熱蒸鍍全無機混合鹵化物鈣鈦礦藍色發光二極體之研究」「雙源順序熱蒸鍍全無機混合鹵化物鈣鈦礦藍色發光二極體之研究」,國立中央大學國立中央大學,碩士論文碩士論文,中華中華民國民國111年年

指導教授

詹佳樺(Chia-Hua Chan)

審核日期

2023-8-15

推文