Embedded growth of colorful CsPbX3 (X = Cl, Br, I) nanocrystals in metal-organic frameworks at Room Temperature

Author:

Chen ChenORCID,Nie Lei,Huang Yizhe,Xi Shuang,Liu Xingyue,Zhang Xiwen,Shi Tielin,Liao Guanglan,Liu Shiyuan,Tang ZirongORCID

Abstract

Abstract Herein, we develop a novel strategy for preparing all-inorganic cesium lead halide (CsPbX3, X = Cl, Br, I) perovskite nanocrystals (NCs)@Zn-based metal-organic framework (MOF) composites through interfacial synthesis. The successful embedding of fluorescent perovskite NCs in Zn-MOFs is due to the in situ confined growth, which is attributed to the re-nucleation of water-triggered phase transformation from Cs4PbBr6 to CsPbBr3. The controllable synthesis of mixed-halide based composites with various emission wavelength can be achieved by adding the desired amount of halide (Cl or I) salts in the re-nucleation process. More importantly, the anion exchange reaction is inhibited among various composites with different halogen atoms by being trapped in MOFs. Besides, a white light-emitting diode (WLED) is produced using a blue LED chip with the green-emitting and red-emitting composites, which has a color coordinate of (0.3291, 0.3272) and a wide color gamut. This work provides a novel route to achieving perovskite NCs growth in MOFs, which also can be extended to the other NCs embedded in frames as well.

Funder

Center of Micro-Fabrication and Characterization

National Science Foundation of China

National Basic Research Program of China

Analytical and Testing Center of Huazhong University of Science and Technology

Hubei Key Laboratory of Modern Manufacturing Quantity Engineering

Publisher

IOP Publishing

Subject

Electrical and Electronic Engineering,Mechanical Engineering,Mechanics of Materials,General Materials Science,General Chemistry,Bioengineering

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