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Pure Red Emission with Spectra-Stable in Full Iodine-based Quasi-2D Perovskite Films by Controlling Phase Distribution
Nanoscale ( IF 5.8 ) Pub Date : 2024-12-20 , DOI: 10.1039/d4nr04100c Zhiqiang Ming, Siyao Li, Xinyi Luo, Siman Liu, Danliang Zhang, Xiaoli Zhu, Anlian Pan, Xiao Wang
Nanoscale ( IF 5.8 ) Pub Date : 2024-12-20 , DOI: 10.1039/d4nr04100c Zhiqiang Ming, Siyao Li, Xinyi Luo, Siman Liu, Danliang Zhang, Xiaoli Zhu, Anlian Pan, Xiao Wang
Quasi-2D perovskites have emerged as a promising candidate material for displays owing to their high photoluminescence quantum yields and low-cost solution synthesis. However, achieving pure red quasi-2D perovskite films with luminescence centered at 630 nm and a narrow emission band presents a critical challenge for high-definition display. Herein, via incorporating 18-crown-6 as additives that simultaneously passivates the defects and regulates phase distribution, full iodine-based quasi-2D perovskite films with single red emission peak and spectra-stable are designed. Additionally, through introducing appropriate chlorobenzene and enhancing annealing temperature resulting in a narrower phase distribution, the full width at half maximum (FWHM) of emission peak is significantly reduced. After the optimized process, we fabricate quasi-2D perovskite films with pure red emission, which exhibit a PL peak at 627.9 nm and a narrow FWHM of 45.1 nm. Based on these pure red perovskite films, diverse complex patterns such as fluorescent anti-counterfeiting labels are implemented for data storage and information encryption. This study provides an effective approach to developing quasi-2D perovskite with high color purity for high-definition purposes.text goes here.
更新日期：2024-12-20
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