Photoluminescence (PL) of rare earth (RE) ions has been observed in RE ion-doped perovskite nanocrystals (PeNCs); however, the electroluminescence (EL) originating from the RE ions is still not achieved in perovskite light-emitting diodes (PeLEDs). Herein, we demonstrate the first observation of EL from the PeLEDs based on Sm³⁺-doped CsPbCl₃ PeNCs, which is realized by benefiting from the as-prepared Sm³⁺-doped CsPbCl₃ PeNCs with photoluminescence quantum yield (PLQY) as high as 85% synthesized through a modified hot-injection method. The color of the EL can be modulated from the blue to the orange spectral region by varying the Sm³⁺ ion doping concentration. Therefore, the single-component white light-emitting PeLEDs with chromaticity coordinate (CIE) of (0.32, 0.31), a maximum luminance of 938 cd/m², EQE of 1.2%, and color rendering index (CRI) of 93 are realized, which are desirable results for practical application. This work demonstrates the unique application of RE-doped PeNCs and provides a strategy for devices using white light PeLEDs.

中文翻译：

---

Single掺杂金属卤化物钙钛矿纳米晶体用于单组分电致发光白光二极管

在掺杂稀土离子的钙钛矿纳米晶体（PeNCs）中已经观察到稀土（RE）离子的光致发光（PL）。然而，在钙钛矿型发光二极管（PeLED）中仍无法实现源自RE离子的电致发光（EL）。在这里，我们展示了基于Sm ³⁺掺杂的CsPbCl ₃ PeNCs的PeLED的EL的首次观察，这是通过受益于制备的Sm ³⁺掺杂的CsPbCl ₃ PeNCs的光致发光量子产率（PLQY）高通过改良的热注射法合成的85％的α-烯烃。通过改变Sm ^3+，可以将EL的颜色从蓝色光谱调制为橙色光谱区域离子掺杂浓度。因此，可以实现色度坐标（CIE）为（0.32，0.31），最大亮度为938 cd / m ²，EQE为1.2％，显色指数（CRI）为93的单组分发白光的PeLED。，这是实际应用的理想结果。这项工作演示了掺RE的PeNC的独特应用，并为使用白光PeLED的设备提供了一种策略。