@article{Wu2026, 
author = {Ruixiang Wu and Fengjie Guo and Zhiliang Han and Zixuan Wang and Peigeng Han and Bin Li and Rui Zhang and Junfeng Zhang and Xiangyang Miao and Chengbing Qin and Liantuan Xiao},
title = {Efficient NIR-II luminescence of inorganic Er-Yb alloyed nanocrystals for optical communication},
year = {2026},
journal = {Nano Research},
keywords = {exciton dynamics, near-infrared luminescence, optical communication, rare earth chloride nanocrystals, Er-Yb alloying},
url = {https://www.sciopen.com/article/10.26599/NR.2026.94908846},
doi = {10.26599/NR.2026.94908846},
abstract = {Zero-dimensional metal halides have emerged as a promising class of luminescent materials, attracting significant interest due to their unique electronic structures and fascinating optical characteristics. The photoluminescence (PL) properties of inorganic ternary Cs3ErxYb1-xCl6 nanocrystals (NCs) were investigated. These alloyed NCs emit dual-band near-infrared (NIR) PL, featuring a sharp NIR-II emission at 1543 nm alongside an NIR-I emission around 987 nm, which originate from the rare earth Er3+ and Yb3+ ions, respectively. Cs3Er0.06Yb0.94Cl6 NCs exhibit efficient NIR-II PL with a quantum yield of 2.7% and a lifetime of 157 µs. The enhanced NIR-II PL can be attributed to highly localized excitons, fast energy transfer from Yb3+ to Er3+ ions and passivation of nonradiative defect states in the Er-Yb alloyed NCs. Given their good penetrability of the NIR-II PL from Er3+ ions, a single-component NIR phosphor-converted light-emitting diode (pc-LED) fabricated using Cs3Er0.06Yb0.94Cl6 NCs demonstrates their potential for future applications in optical communication.}
}