Obtaining stable QDs with different emission colors and high PLQY values for optoelectronic applications is important. There are currently applied treatment methods to increase the PLQY value and stabilization of QDs. On the other hand, variations in the surface-to-volume ratio associated with changes in QD size indicate that the treatment methods applied must be optimized according to the specific size of the QDs. This study focuses on the optimization of the synthesis and treatment processes of green and red emission CdSeTe QDs with high PLQY for use in optoelectronic devices. Initially, the synthesis processes for green and red emission QDs were optimized according to precursor molar amounts, synthesis time and synthesis temperature. Then, chloride treatment, CdS and ZnS shell coating methods were optimized and applied separately to increase the PLQY values of these QDs. The results showed that the PLQY value increased up to 95.23 % with 30 % CdCl2 treatment by mass for green emitting CdSeTe QDs and up to 96.31 % with 40 % CdCl2 chloride treatment by mass for red emitting QDs. The study includes a comprehensive comparison of emission, absorption, XRD, elemental analysis, CV, PL lifetime, HR-TEM analysis and stabilization analysis for the synthesized CdSeTe QD types.

中文翻译：

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高效绿光和红光发射 CdSeTe 量子点：光学应用的合成和 PLQY 改进


对于光电应用，获得具有不同发射颜色和高 PLQY 值的稳定 QD 非常重要。目前有应用的方法可以提高 PLQY 值和 QD 的稳定性。另一方面，与 QD 大小变化相关的表面体积比的变化表明，必须根据 QD 的特定大小优化所应用的处理方法。本研究的重点是优化用于光电器件的高 PLQY 的绿光和红光发射 CdSeTe QDs 的合成和处理工艺。最初，根据母离子摩尔量、合成时间和合成温度优化绿光和红光发射量子点的合成过程。然后，优化氯化物处理、CdS 和 ZnS 壳涂层方法并分别应用，以提高这些 QD 的 PLQY 值。结果表明，以质量计 30 % CdCl2 处理后，发光红光 CdSeTe 量子点的 PLQY 值提高了 95.23 %，而以质量计为 40 % CdCl2 处理后，发光红光量子点的 PLQY 值提高了 96.31 %。该研究包括对合成的 CdSeTe QD 类型的发射、吸收、XRD、元素分析、CV、PL 寿命、HR-TEM 分析和稳定性分析的全面比较。