Journal
CHEMICAL COMMUNICATIONS
Volume 58, Issue 99, Pages 13775-13778Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cc05150h
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Funding
- National Key Basic Research Program of China [2021YFB3200302]
- National Natural Science Foundation of China [51832001]
- Fundamental Research Funds for the Central Universities of China
- Department of Science & Technology of Shaanxi Province
- Northwestern Polytechnical University [2020GXLH-Z-027]
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A facile and scalable method for preparing well-controlled perovskite heterostructures is developed in this study. The 3D/2D CsPbBr3/PEA(2)PbBr(4) perovskite heterostructures with epitaxial structure are successfully synthesized via a one-step solution method. The formation mechanism is studied using in-situ time-resolved photoluminescence spectroscopy. Photodetectors based on these heterostructures exhibit significantly improved photoresponsivities and on/off ratios compared to single component perovskite devices.
Facile and scalable synthesis of perovskite heterostructures with well-controlled heterointerfaces remains challenging. Herein, we developed a simple one-step solution method to prepare 3D/2D CsPbBr3/PEA(2)PbBr(4) perovskite heterostructures with a well-defined epitaxial structure in the gram scale. The formation mechanism was detailed by using in situ time-resolved photoluminescence (PL) spectroscopy analysis. In addition, a series of 3D/2D epitaxial heterostructures were also prepared by changing the organic cations or halogen anions. Due to the effective charge separation and transfer, photodetectors based on the type-II 3D/2D CsPbBr3/PEA(2)PbBr(4) heterostructures showed up to 120 times higher photoresponsivities and 50 times higher on/off ratios compared to devices based on single component perovskites.
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