Abstract In this paper, ZnS, Mn2+-doped ZnS, and ZnS:Mn2+/ZnS core-shell quantum dots (QDs) are successfully prepared by the co-precipitation route at 80 °C in basic aqueous solutions. X-ray diffraction (XRD), energy dispersive X-ray spectrometer (EDX), UV–Visible absorption (UV–Vis), photoluminescence (PL), photoluminescence excitation (PLE) spectroscopy and photometric studies were employed to characterize the samples. The QDs have the zinc blende structure, and their CIE (x, y) chromaticity coordinates can be tuned by the Mn2+ impurity and the TGA-Zn2+ concentrations. The overlap between these QDs spectral power and the human eye sensitivity spectra is significantly enhanced with the efficient energy transfer process. The scotopic/photopic (S/P) ratios, the luminous efficacy of optical radiation (LER), and the color correlated temperature (CCT) increase from 0.93 to 1.69, 389.84–706.53 l m/Wotp, and 2782–14,037 K, respectively. As a result, the ZnS:Mn2+ QDs are suitable for the development of tune color components in white thin-film electroluminescent (TFEL) devices as well as light-emitting diodes (LEDs).

中文翻译：

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用于白光发射的 ZnS:Mn2+ 量子点的光致发光和光度特性研究

摘要 本文通过80 °C 碱性水溶液共沉淀法成功制备了ZnS、Mn2+ 掺杂的ZnS 和ZnS:Mn2+/ZnS 核壳量子点(QDs)。采用 X 射线衍射 (XRD)、能量色散 X 射线光谱仪 (EDX)、紫外-可见吸收 (UV-Vis)、光致发光 (PL)、光致发光激发 (PLE) 光谱和光度学研究来表征样品。量子点具有闪锌矿结构，它们的 CIE (x, y) 色度坐标可以通过 Mn2+ 杂质和 TGA-Zn2+ 浓度进行调整。这些量子点光谱功率和人眼灵敏度光谱之间的重叠通过有效的能量转移过程得到显着增强。暗视/明视 (S/P) 比、光辐射的发光效率 (LER)、色相关温度 (CCT) 分别从 0.93 增加到 1.69、389.84–706.53 l m/Wotp 和 2782–14,037 K。因此，ZnS:Mn2+ QDs 适用于开发白色薄膜电致发光 (TFEL) 器件以及发光二极管 (LED) 中的调谐颜色组件。