Stable and Efficient Upconversion Single Red Emission from CsPbI3 Perovskite Quantum Dots Triggered by Upconversion Nanoparticles

Yongsheng Zhu; Jun Zhao; Xueguo Li; Xiumei Xu; Jinshu Huang; Xiaoxu Ji; Gang Yang; Gencai Pan

doi:10.1021/acs.inorgchem.0c03516

Stable and Efficient Upconversion Single Red Emission from CsPbI₃ Perovskite Quantum Dots Triggered by Upconversion Nanoparticles

Inorg Chem. 2021 Feb 15;60(4):2649-2655. doi: 10.1021/acs.inorgchem.0c03516. Epub 2021 Jan 31.

Authors

Yongsheng Zhu¹, Jun Zhao², Xueguo Li¹, Xiumei Xu¹, Jinshu Huang¹, Xiaoxu Ji¹, Gang Yang¹, Gencai Pan²

Affiliations

¹ Henan International Joint Laboratory of MXene Materials Microstructure, College of Physics and Electronic Engineering, Nanyang Normal University, 1638 Wolong Road, Nanyang 473061, P. R. China.
² School of Physics and Electronics, Henan University, No.1 Jinming Street, Kaifeng 475004, P. R. China.

PMID: 33522231
DOI: 10.1021/acs.inorgchem.0c03516

Abstract

Here, composites including highly efficient inert shell-modified NaYF₄:Yb/Tm@NaYF₄ upconversion nanoparticles (UCNPs) and CsPbI₃ perovskite quantum dots (PQDs) have been successfully synthesized by the assistance of (3-aminopropyl)triethoxysilane (APTES) as a precursor for a SiO₂ matrix. UCNPs and CsPbI₃ PQDs in this composite structure show excellent stability in ambient conditions. Importantly, the efficient UC emission of CsPbI₃ PQDs was realized, which means that the single red emission of inert shell-modified UCNPs can be easily obtained by depending on these composite structures. Furthermore, the single red emission wavelength can be easily regulated from 705 to 625 nm by introducing appropriate proportion of Br^- ions, which is very difficult to achieve for traditional UCNPs. Moreover, benefiting from the efficient downshifting (DS) red emission of CsPbI₃ PQDs, the composites possess the dual-wavelength excitation characteristics. So, the excellent dual-mode anticounterfeiting application has been demonstrated. This work will provide a new idea for the development of perovskite-based multifunctional materials.