Zinc sulfide (ZnS) doped with transition metal has been used as phosphor for various optoelectronic applications. In the present report, ZnS:Mn doped and ZnS:Mn,Ni co‐doped were prepared using chemical co‐precipitation method using polyvinyl pyrolidone as a surfactant. The structural studies were carried out using an X‐ray diffraction technique; optical studies have been performed using ultraviolet–visible light absorption and photoluminescence (PL) spectroscopy. The presences of functional groups were confirmed using Fourier transform infrared spectroscopy. The X‐ray diffraction study and Reitveld analysis confirms the formation of cubic phase with crystalline size 2–3 nm for undoped and doped ZnS nanoparticles. A novel and enhanced luminescence characteristic have been observed in PL spectra. The luminescence intensity of Mn,Ni co‐doped ZnS in the blue region is much higher of that of ZnS. The PL results indicate that the doping of Ni creates shallow trap states or luminescence centres in the forbidden energy gap, which quenches the Mn states emission. Concentration quenching has been observed in Mn‐doped ZnS nanoparticles. From CIE coordinates, it is seen that the yellow and blue light emission of ZnS:Mn,Ni co‐doped nanophosphor may be a promising candidate for display devices and phosphor converted light‐emitting diode applications.

中文翻译：

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Mn，Ni共掺杂硫化锌纳米晶体的发光研究。

掺杂有过渡金属的硫化锌（ZnS）已被用作各种光电应用的荧光粉。在本报告中，使用聚乙烯吡咯烷酮作为表面活性剂，通过化学共沉淀法制备了共掺杂的ZnS：Mn和ZnS：Mn，Ni。结构研究使用X射线衍射技术进行；光学研究已经使用紫外可见光吸收和光致发光（PL）光谱进行。使用傅立叶变换红外光谱法确认了官能团的存在。X射线衍射研究和Reitveld分析证实了未掺杂和掺杂的ZnS纳米粒子的晶体尺寸为2-3 nm的立方相的形成。在PL光谱中已经观察到新颖且增强的发光特性。Mn的发光强度 Ni在蓝色区域中共掺杂的ZnS比ZnS高得多。PL结果表明，Ni的掺杂在禁能隙中产生了浅的陷阱态或发光中心，从而终止了Mn态的发射。在掺锰的ZnS纳米颗粒中观察到浓度猝灭。从CIE坐标可以看出，ZnS：Mn，Ni共掺杂的纳米磷光体的黄色和蓝色发光可能是显示设备和磷光转换发光二极管应用的有希望的候选者。