近年來，因為量子點顯示技術興起，全無機銫鉛鹵素鈣鈦礦量子點因其螢光量子效率高、窄螢光半高寬等優勢，引起了廣泛關注。然而，在紅/綠/藍三原色中，氯化銫鉛鈣鈦礦藍光量子點相較綠光與紅光量子點，其光電性質仍有大幅度改善的空間，對於日後進行全彩量子點發光二極體的發展無疑是一大限制。因此，在本研究將使用熱注入法探討氯化銫鉛鈣鈦礦藍光量子點的合成與光電性質。在研究中，藉由鹵素過量法以添加溴化鋅與氯化鋅的方式，使溴氯化銫鉛鈣鈦礦藍光量子點的螢光量子效率提升至20.4 %；此外，亦透過陰離子置換法將氯化銫鉛鈣鈦礦藍光量子點結構中部份氯離子以溴離子取代，更可提高藍光量子點的螢光量子效率達38.5 %。以上兩種方法，除了可用來提高氯化銫鉛鈣鈦礦藍光量子點的螢光效率之外，更可藉此進行激發光波段的調整。而在合成最後離心過程中，產物主要分散於懸浮相中，但仍可發現有許多不具發光性質的沉澱相存在。為了有效地提高量子點的產率，在本研究中進一步的將懸浮相與沉澱相進行優化處理。在此，以正四丁基六氟磷酸銨與超純水各別對懸浮相與沉澱相進行處理。經正四丁基六氟磷酸銨處理之後的懸浮相與沉澱相的螢光量子效率可分別達到80.7 %與59.4 %。隨後，使用本實驗室自行合成的三原色量子點進行量子點發光二極體製作與光電性質分析。其中，綠光量子點發光二極體的啟動電壓為3.60 V，最大輝度值為352 cd/m2，電流效率為2.57 cd/A，外部量子效率為0.821 %；紅光量子點發光二極體的啟動電壓為5.30 V，最大輝度值為106 cd/m2，電流效率為0.311 cd/A，外部量子效率為0.660 %；藍光量子點發光二極體的最大輝度值為0.389 cd/m2，電流效率4.85x10-3 cd/A，外部量子效率8.87x10-3 %。透過此三原色量子點發光二極體所形成的色域可達125 %的NTSC標準。

Recently, due to the rise of quantum dots display technology, all inorganic cesium lead halogen (CsPbX3, X=Cl, Br, I) perovskite quantum dots (PQDs) have attracted wide attention due to their advantages of high photoluminescence quantum yield (PL-QY) and narrow fluorescence full width at half maximum (FWHM). However, in red/green/blue colors, cesium lead chloride perovskite (CsPbCl3) blue emission PQDs have much room for improvement in optoelectronic properties compared to green and red emission PQDs and it will be the bottleneck for full-color quantum dots light-emitting diode (QD-LED). Therefore, in this study, the hot injection method was used to investigate the synthesis and optoelectronic properties of CsPbCl3 PQDs. By using zinc bromide and zinc chloride as excess halogens during synthesis for improving the PL-QY of cesium lead bromide chloride (CsPb(Br/Cl)3) PQDs to achieve 20.4 %. In addition, the anion exchange process was employed to replace part of chloride in the structure of CsPbCl3 PQDs as bromide for improving the PL-QY of CsPb(Br/Cl)3 PQDs to achieve 38.5 %. The above two methods can not only improve the PL-QY of blue emission PQDs, but can also adjust the emission wavelength. In the final stage, the centrifugation was used to separate the main product in the suspension phase and the non-emission by-product in precipitation phase. In order to effectively improve the yield of PQDs, the suspension phase and precipitation phase were further optimized. Herein, n-tetrabutylammonium hexafluorophosphate (TBAPF6) and ultrapure water were employed to treat suspension phase and precipitation phase. The PL-QY of the suspension phase and precipitation phase after treatment with TBAPF6 reached 80.7% and 59.4%, respectively. Subsequently, the red/green/blue emission QDs synthesized by lab were used to make QD-LED and analyzed their optolelectronic properties. Among them, the turn-on voltage (Von), maximum luminance (Lummax), current efficiency (CE) and external quantum efficiency (EQE) of cesium lead bromide (CsPbBr3)green emission QD-LED were 3.60 V, 352 cd/m2, 2.57 cd/A and 0.821%. The Von, Lummax, CE and EQE of cesium lead bromide iodide (CsPb(Br/I)3) red emission QD-LED were 5.30 V, 106 cd/m2, 0.311 cd/A and 0.660%. The Lummax, CE and EQE of CsPb(Br/Cl)3 blue emission QD-LED were 0.389 cd/m2, 4.85x10-3 cd/A and 8.87x10-3%. The gamut of three color QD-LED can achieve 125% of NTSC standard.

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