本文研究正型液晶樣本搭配鈣鈦礦薄膜(CsPbIBr2)的光電特性。樣本的製作方法在乾淨玻璃基板上旋塗上鈣鈦礦薄膜，搭一面水平配向玻璃基板製作成液晶樣本。研究綠光對具鈣鈦礦薄膜的液晶樣本的影響，研究結果顯示照射綠光會使得樣本的相位下降，增強照光強度與增加照光時間都會造成樣本相位下降，原因是鈣鈦礦薄膜吸收了綠光產生熱，熱效應是使得液晶的相位下降。研究中也探討同時施加電壓與照光後此搭配鈣鈦礦薄膜之液晶樣本的光電特性。本文提供一種光控液晶樣本產生不同相位的方法。

This study investigates the optoelectronic properties of the nematic liquid crystal (LC) sample combined with a perovskite thin film (CsPbIBr2). The LC sample was fabricated with a perovskite thin film on a clean glass substrate and a glass substrate with a homogenous alignment layer. The study examines the effects of green light on the LC sample with the perovskite thin film. The research results indicate that exposing the LC sample to green light leads to a decrease in the phase retardation of LCs. Increasing the intensity and duration of the green light exposure both result in a phase decrease as well. This behavior is attributed to the perovskite thin film absorbing the green light and generating heat, which causes the phase reduction in LCs. Additionally, the study explores the optoelectronic properties of these LC samples with the combined application of voltage and light. This work presents a method for generating different phases in optically controlled LC samples using the perovskite thin film.

摘要......i
Abstract......ii
誌謝......iii
目錄......iv
表目錄......vi
圖目錄......vii
符號說明...... ix
第一章 緒論......1
第二章 相關理論......2
2.1 液晶的起源......2
2.2 液晶的定義......2
2.3 液晶的分類......3
2.3.1 盤狀分子......3
2.3.2 棒狀分子......5
2.4 液晶物理......9
2.4.1 液晶的光學異向性(optical anisotropic)......9
2.4.2 介電異向性......13
2.4.3 Fréedericksz Transition......15
2.4.4 溫度對液晶的影響......15
2.4.5 連續彈性體理論......16
2.4.6 液晶的相位延遲(Phase Retardation)......17
2.4.7 鈣鈦礦相關文獻探討......19
3.1 材料介紹......26
3.1.1 向列型液晶(E7)......26
3.1.2 鈣鈦礦溶液（CsPbIBr2）......27
3.2.1 玻璃基板清洗......27
3.2.2 製作水平配向膜基板......27
3.2.3 製作鈣鈦礦薄膜基板......28
3.2.4 樣本製作......28
3.3 實驗架設及量測......29
3.3.1 樣本厚度......29
3.3.2 穿透率-電壓曲線(T-V Curve)......30
3.3.3 樣本吸收光譜圖......32
3.3.4 動態量測......33
第四章 結果與討論......35
4.1 樣本的各項光電特性......35
4.1.1樣本吸收光譜圖......35
4.1.2不同莫爾濃度的樣本穿透光譜圖......35
4.1.3 樣本穿透率對電壓曲線......36
4.1.4樣本偏光顯微鏡圖......37
4.2 綠光雷射對樣本的影響......38
4.2.1 固定照100秒不同綠光強度的動態量測......38
4.2.2 固定綠光強度分別照射不同時間下的動態量測......39
4.3 同時施加外加電壓與綠光雷射對樣本的影響......43
4.3.1 對樣本施加不同強度的綠光與施加固定小電壓進行動態量測......43
4.3.2 長時間DC電壓同時照射綠光對樣本的影響......45
4.3.3 純E7樣本照射由低到高的綠光強度之動態量測......46
第五章 結論......48
參考文獻......49
Extended Abstract......51

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