Samarium-Doped Metal Halide Perovskite Nanocrystals for Single-Component Electroluminescent White Light-Emitting Diodes
Samarium-Doped Metal Halide Perovskite Nanocrystals for Single-Component Electroluminescent White Light-Emitting Diodes
复制标题
用于单组分电致发光白光发光二极管的钐掺杂金属卤化物钙钛矿纳米晶体
DOI：
10.1021/acsenergylett.0c00931
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发表时间：
2020-07-10
影响因子：
22
通讯作者：
Song, Hongwei
中科院分区：
文献类型：
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作者：
Sun, Rui;Lu, Po;Song, Hongwei
在稀土离子掺杂的钙钛矿纳米晶体（PeNCs）中已经观察到稀土离子的光致发光（PL）;然而，在钙钛矿发光二极管（PeLED）中仍然没有实现源自稀土离子的电致发光（EL）。在这里，我们展示了第一次观察到的EL从PeLED的基础上Sm 3+掺杂CsPbCl 3 PeNCs，这是实现从所制备的Sm 3+掺杂CsPbCl 3 PeNCs的光致发光量子产率（PLQY）高达85%，通过改进的热注入方法合成的受益。通过改变Sm ~（3+）离子的掺杂浓度，可以将EL的颜色从蓝色调制到橙子光谱区。因此，实现了色坐标（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的单组分白色发光PeLED，这是实际应用中所期望的结果。这项工作展示了稀土掺杂的PeNCs的独特应用，并提供了一个策略，使用白色光PeLED的设备。
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/m(2), 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.