Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 872, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.159612
Keywords
Perovskite nanocrystals; Blue luminescence; CsPbCl3?xBrx; High stability; Photoluminescence quantum yield
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Funding
- Natural Science Foundation of Chongqing Municipality [cstc2018jcyjAX0625]
- Natural Science Foundation of China [91741105]
- Program for Innovation Team Building at Institutions of Higher Education in Chongqing [CXTDX201601011]
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The rapid synthesis of CsPbCl3?xBrx perovskite nanocrystals at room temperature provides a cost-effective and efficient method for industrial production of blue-emitting devices with precise control over photoluminescence wavelength and excellent stability and high photoluminescence quantum yields.
With the development of blue-emitting all-inorganic Pb-based perovskite nanocrystals (NCs), the perovskite family (e.g., CsPbCl3?xBrx NCs) has drawn researchers? attention. Although the hot injection method has been widely used to fabricate blue-emitting perovskite NCs, this synthesis method generally needs an inert gas atmosphere, high temperature, and localized injection operation, leading to high cost and limiting the applications of perovskite NCs. Herein, we synthesized mixed-halide blue-emitting CsPbCl3?xBrx (x = 0.0?2.5) perovskite NCs rapidly at room temperature. The as-prepared perovskite NCs exhibited excellent stability and high photoluminescence quantum yields up to 89% because of their low non-radiative recombination rate. The photoluminescence wavelength of the NCs was precisely regulated across the whole visible region (406?488 nm). Importantly, this facile method to synthesize perovskite NCs not only requires mild experimental conditions, dramatically lowering the cost of synthesis, but also provides a feasible route for the industrial production of efficient blue-emitting devices. @& nbsp;2021 Elsevier B.V. All rights reserved.
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