State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences , 3888 Eastern South Lake Road, Changchun 130033, China.
Nano Lett. 2017 Dec 13;17(12):8005-8011. doi: 10.1021/acs.nanolett.7b04575. Epub 2017 Dec 1.
Cesium lead halide (CsPbX) perovskite nanocrystals (NCs) have demonstrated extremely excellent optical properties and great application potentials in various optoelectronic devices. However, because of the anion exchange, it is difficult to achieve white-light and multicolor emission for practical applications. Herein, we present the successful doping of various lanthanide ions (Ce, Sm, Eu, Tb, Dy, Er, and Yb) into the lattices of CsPbCl perovskite NCs through a modified hot-injection method. For the lanthanide ions doped perovskite NCs, high photoluminescence quantum yield (QY) and stable and widely tunable multicolor emissions spanning from visible to near-infrared (NIR) regions are successfully obtained. This work indicates that the doped perovskite NCs will inherit most of the unique optical properties of lanthanide ions and deliver them to the perovskite NC host, thus endowing the family of perovskite materials with excellent optical, electric, or magnetic properties.
铯铅卤（CsPbX）钙钛矿纳米晶体（NCs）具有极其优异的光学性能，在各种光电设备中有很大的应用潜力。然而，由于阴离子交换，很难实现实际应用中的白光和多色发射。在此，我们通过改良的热注射法成功地将各种镧系离子（Ce、Sm、Eu、Tb、Dy、Er 和 Yb）掺杂到 CsPbCl 钙钛矿 NCs 的晶格中。对于镧系离子掺杂的钙钛矿 NCs，成功地获得了高光致发光量子产率（QY）和稳定且可调谐的多色发射，涵盖了从可见光到近红外（NIR）区域。这项工作表明，掺杂的钙钛矿 NCs 将继承镧系离子的大部分独特光学性质，并将其传递给钙钛矿 NC 主体，从而赋予钙钛矿材料家族优异的光学、电学或磁性性质。
