@article{Peng2025, 
author = {Yi Peng and Wanzhong Gu and Yuhui Dong and Yucong Ji and Danni Yan and Ziyun Lin and Li Zhang and Yousheng Zou and Haibo Zeng},
title = {15.13% Sr-doped CsPbI3 quantum dots with near-unity quantum yield via surface ligand compensation},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {4},
pages = {94907257},
keywords = {CsPbI3 quantum dots, Sr-doping, ligand compensation, photoluminescence quantum yield, environmental stability},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907257},
doi = {10.26599/NR.2025.94907257},
abstract = {Sr-doping of perovskite quantum dots (QDs) is a promising strategy to reduce Pb content and improve optical performance and stability. However, excessive Sr introduces new defects that degrade photoluminescence quantum yield (PLQY). Therefore, it is a challenge to balance high optical performance with high doping concentration for the preparation of environmentally friendly perovskite QDs. In this study, we report the highest Sr/Pb ratios Sr-doped CsPbI3 QDs (15.13%) with a near-unity PLQY. The balance between high PLQY and high Sr-doping rate is achieved through the introduction of oleylammonium iodide (OAmI) ligand compensation during the anti-solvent purification process, which can form an iodine-enriched environment and effectively passivates the surface defects of QDs caused by excessive Sr-doping. Moreover, the Sr-doped CsPbI3 QDs exhibit superior stability in environments with high temperature and humidity or direct contact with water. This strategy provides a novel approach for the preparation of lead-less and lead-free QDs with superior optical performance and stability, offering a potential solution for environmentally friendly applications.}
}