Chinese Journal of Liquid Crystals and Displays, Volume. 36, Issue 10, 1352(2021)

Fluorescence properties of potassium ions doped CsPbCl3∶ Mn perovskite quantum dots

CHANG Peng, ZHAI Yue, WU Na, ZHANG Hong, ZHU Qiang-qiang, and WANG Le
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    Manganese (Mn2+) ion-doped all-inorganic CsPbCl3 perovskite quantum dots have shown great potential for application in Mini/Micro-LED display devices due to their unique photoluminescence properties and nano-scale particle size. However, the current photoluminescence quantum yields of CsPbCl3∶Mn2+ perovskite quantum dots is low and cannot meet the needs of practical applications. Herein, the potassium (K+) and Mn2+ ions co-doped CsPbCl3 perovskite quantum dots are synthesized via the hot injection method. The prepared CsPbCl3∶(K+, Mn2+) perovskite quantum dots present a dual-color emission, which can be assigned to the perovskite excitons emission and Mn2+ ions emission. The photoluminescence quantum yield of CsPbCl3∶(K+, Mn2+) perovskite quantum dots is improved from 16.5% of original to 66.2% through the optimization of K+ ions doping concentration. Meanwhile, the regulation mechanism of K+ ions doping on the photoluminescence properties of CsPbCl3∶Mn2+perovskite quantum dots are investigated. It is shown that the incorporation of K+ ions can effectively inhibit the formation of intrinsic defect states and Mn-Mn dimers or Mn-related defects in CsPbCl3∶(K+, Mn2+) perovskite quantum dots, thus enhancing the radiative recombination luminescence of carriers in perovskite quantum dots. Benefiting from the strategy of hetero-ions doping, these doped perovskite quantum dots are expected to be applied in Mini/Micro-LED display fields.

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    CHANG Peng, ZHAI Yue, WU Na, ZHANG Hong, ZHU Qiang-qiang, WANG Le. Fluorescence properties of potassium ions doped CsPbCl3∶ Mn perovskite quantum dots[J]. Chinese Journal of Liquid Crystals and Displays, 2021, 36(10): 1352

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    Paper Information

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    Received: Jun. 17, 2021

    Accepted: --

    Published Online: Nov. 6, 2021

    The Author Email:

    DOI:10.37188/cjlcd.2021-0161

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