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Water-resistant, monodispersed and stably luminescent CsPbBr3/CsPb2Br5 core-shell-like structure lead halide perovskite nanocrystals

机译:防水,单分散且稳定发光CSPBBR3 / CSPB2BR5核 - 壳样结构铅卤化物钙钛矿纳米晶体

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摘要

Lead halide perovskite materials are thriving in optoelectronic applications due to their excellent properties, while their instability due to the fact that they are easily hydrolyzed is still a bottleneck for their potential application. In this work, water-resistant, monodispersed and stably luminescent cesium lead bromine perovskite nanocrystals coated with CsPb2Br5 were obtained using a modified non-stoichiometric solution-phase method. CsPb2Br5 2D layers were coated on the surface of CsPbBr3 nanocrystals and formed a core-shell-like structure in the synthetic processes. The stability of the luminescence of the CsPbBr3 nanocrystals in water and ethanol atmosphere was greatly enhanced by the photoluminescence-inactive CsPb2Br5 coating with a wide bandgap. The water-stable enhanced nanocrystals are suitable for long-term stable optoelectronic applications in the atmosphere.
机译:铅卤化铅钙钛矿材料在光电应用中蓬勃发展,由于它们的优异性能,而它们的不稳定性由于它们很容易水解,因此仍然是其潜在应用的瓶颈。 在该工作中,使用改性的非化学计量溶液相法得到涂有CSPB2BR5的耐水,单分散和稳定发光铯铅溴钙钛矿纳米晶体。 CSPB2BR5 2D层涂覆在CSPBBR3纳米晶体的表面上,并在合成方法中形成核壳状结构。 通过宽带隙的光致发光 - 无活性CSPB2BR5涂层大大提高了水和乙醇气氛中CSPBBR3纳米晶体的发光的稳定性。 水稳态增强纳米晶体适用于大气中的长期稳定光电应用。

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  • 来源
    《Nanotechnology》 |2017年第44期|共9页
  • 作者单位

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    lead halide perovskite nanocrystals; water-resistant; stably luminescent; core-shell structure; coating;

    机译:卤化卤化卤化物钙钛矿纳米晶体;防水;稳定发光;核心壳结构;涂层;

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