Journal ArticleUnknown
Emission-Tunable Quasi-2D (PEA)<sub>2</sub>FA<sub><i>n</i>–1</sub>Pb<sub><i>n</i></sub>Br<sub>3<i>n</i>+1</sub> Perovskite Films via an A-Site Cation-Assisted Strategy for Light-Emitting Diodes
Authors
Lijia Zhao, Sihang Ji, Ke Zhao, Hui Wang, …
Author Affiliations
Ministry of Education of the People's Republic of China, Jilin Normal University, Ministry of Education, Ningbo University of Technology, ...
Published InThe Journal of Physical Chemistry C
Year2025
Citations2
Abstract
Organic–inorganic hybrid perovskite crystals have attracted significant attention in recent years due to their outstanding optoelectronic properties. However, the application of low-dimensional perovskite films still faces substantial challenges. In this study, emission-tunable quasi-2D (PEA)2FAn–1PbnBr3n+1 perovskite films were synthesized by using an A-site cation-assisted strategy. The high-quality films were achieved by precisely controlling the precursor solution concentration, antisolvent pinning time, and the ratio of PEA to FA. The resulting quasi-2D perovskites exhibited a continuous emission band from 407 to 560 nm, with a maximum photoluminescence (PL) quantum yield of 52%. The 2D to 3D phase transition of the perovskite crystals was characterized using X-ray diffraction (XRD). Additionally, the introduction of an intermediate PEABr layer significantly enhanced the thermal stability of the…
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