Huang Jianmei, Lei Teng, Siron Martin, Zhang Ye, Yu Sunmoon, Seeler Fabian, Dehestani Ahmad, Quan Li Na, Schierle-Arndt Kerstin, Yang Peidong
Department of Chemistry, University of California, Berkeley, California 94720, United States.
California Research Alliance (CARA) by BASF, Berkeley, California 94720, United States.
Nano Lett. 2020 May 13;20(5):3734-3739. doi: 10.1021/acs.nanolett.0c00692. Epub 2020 May 4.
Because of the toxicity of lead, searching for a lead-free halide perovskite semiconducting material with comparable optical and electronic properties is of great interest. Rare-earth-based halide perovskite represents a promising class of materials for this purpose. In this work, we demonstrate the solution-phase synthesis of single-crystalline CsEuCl nanocrystals with a uniform size distribution centered around 15 nm. The CsEuCl nanocrystals have photoluminescence emission centered at 435 nm, with a full width at half-maximum of 19 nm. Furthermore, CsEuCl nanocrystals can be embedded in a polymer matrix that provides enhanced stability under continuous laser irradiation. Lead-free rare-earth cesium europium halide perovskite nanocrystals represent a promising candidate to replace lead halide perovskites.
由于铅的毒性，寻找一种具有可比光学和电子性能的无铅卤化物钙钛矿半导体材料备受关注。基于稀土的卤化物钙钛矿是实现这一目标的一类很有前景的材料。在这项工作中，我们展示了尺寸均匀分布在15nm左右的单晶CsEuCl纳米晶体的溶液相合成。CsEuCl纳米晶体的光致发光发射峰位于435nm，半高宽为19nm。此外，CsEuCl纳米晶体可以嵌入聚合物基质中，在连续激光照射下提供更高的稳定性。无铅稀土铯铕卤化物钙钛矿纳米晶体是替代铅卤化物钙钛矿的有前途的候选材料。
