本研究使用方便但有效率的水熱法合成全無機鈣鈦礦量子點，並成功摻入可視為光學共振腔之平面型膽固醇液晶，發展出高效率全無機鈣鈦礦量子點摻雜膽固醇液晶雷射器。為確認鈣鈦礦量子點基本材料特性，我們使用HRTEM, EDS, XRD等量測儀器來檢測合成出的量子點材料之尺寸大小、元素組成和晶格結構，最終確認所合成之鈣鈦礦量子點符合CsSnI3鈣鈦礦之黑色斜方晶相。將鈦鈣鈦礦量子點摻入膽固醇液晶製作出鈣鈦礦量子點摻雜膽固醇液晶雷射樣品，並測量雷射輸出偏振性、半高寬和量子點團聚的表面型態，可得到ge值達約1.8、半高寬窄至0.2 nm之雷射輸出，並確認量子點在膽固醇液晶中團聚現象會降低雷射效能。第二部份為改變膽固醇液晶中手性分子摻雜濃度，藉以改變光子能隙邊緣位置來調控雷測輸出波長，結果發現吸收與螢光兩條件之抗衡會影響雷射閥值。本實驗中最低之雷射閥值可達約1.86 µJ/pluse，此值與上述雷射特性(半高寬與ge值)與傳統染料摻雜膽固醇液晶雷射之特性已可相比擬。最後部分乃藉由外加場(溫度及交流與直流電壓)來調變CLC反射波段位置藉以達成鈣鈦礦量子點液晶雷射之多方式可調控性能。此研究中首次發展的全無機鈣鈦礦量子點摻雜膽固醇液晶雷射有潛力應用於未來新穎的光子學應用上，特別是在創新的可調控式光發射元件方面。

This work demonstrated for the first time an highly efficient all-inorganic perovskite quantum dots doped CLC (AIPQD-CLC) laser. The AIPQD material as an efficient optical gain medium in the optical resonator of the CLC planar texture can be obtained by pre-underdoing a low-cost solvothermal process.. Experimental results show that the AIPQD lattice structure corresponds to the black orthorhombic phase of CsSnI3 perovskite. The ge value and linewidth of the lasing signal from the AIPQD-CLC laser measured are around 1.8 and 0.21 nm, respectively. The aggregation of the AIPQDs in the CLC may significantly decrease the lasing performance. In second part, the position of the bandedge can be changed by changing the composition ratio of the chiral and LC such that the lasing wavelength of the AIPQD-CLC laser can be tuned. Experimental results show that both the absorption and photoluminescence (PL) of the QDs may competitively influence the lasing threshold. Additionally, the energy threshold of the AIPQD-CLC laser can be as low as 1.86 μJ/pulse. Including the lasing threshold, ge value and linewidth, the performances of the AIPQD-CLC laser are nearly comparable with those based on traditional dye-doped CLC lasers. In third part, the thermal, AC and DC electrical tuning features of the AIPQD-CLC laser were demonstarted. The AIPQD-CLC laser exhibited a high potential to become a new class of candidates for photonic applications, particularly in multi-tunable light-emitting devices.

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