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首页> 外文期刊>ACS applied materials & interfaces >Improving the Photoluminescence Properties of Perovskite CH3NH3PbBr3,Cl-x Films by Modulating Organic Cation and Chlorine Concentrations
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Improving the Photoluminescence Properties of Perovskite CH3NH3PbBr3,Cl-x Films by Modulating Organic Cation and Chlorine Concentrations

机译:通过调节有机阳离子和氯浓度提高钙钛矿CH3NH3PbBr3,Cl-x薄膜的光致发光性能

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摘要

The photoluminescence (PL) properties of inorganic organic perovskites can be drastically changed by tuning the halogen composition, especially the Cl content. However, our research demonstrated that in addition to the influence of Cl concentration, the PL emission intensity of CH3NH3PbBr3 strongly depends on the content of CH3NH3Br in the coating solution. The effects of CH3NH3Br and Cl concentrations on the PL properties of CH3NH3PbBr3-xClx were investigated. We found that a strong PL emission intensity of CH3NH3PbBr3 can be obtained from solutions with a high CH3NH3Br concentration. The PL emission intensities of CH3NH3PbBr3,Clx films were enhanced by adjusting the molar ratio of PbBr to PbC12 only in a highly concentrated CH3NH3Br environment. Moreover, it was found that an optimum CH3NH3Br/ PbBr2/PbC12 ratio in the precursor solutions can be used to obtain the strongest PL emission intensity of CH3NH3PbBr3,C1, films. Further studies revealed that both CH3NH3Br and Cl concentrations significantly influence the CH3NH3PbBr3,Clx films evolution, which affects their PL properties.
机译:无机有机钙钛矿的光致发光(PL)特性可以通过调节卤素成分(尤其是Cl含量)来大幅改变。但是,我们的研究表明,除了Cl浓度的影响外,CH3NH3PbBr3的PL发射强度还强烈取决于涂料溶液中CH3NH3Br的含量。研究了CH3NH3Br和Cl浓度对CH3NH3PbBr3-xClx的PL性能的影响。我们发现,可以从具有高CH3NH3Br浓度的溶液中获得CH3NH3PbBr3的强PL发射强度。仅在高度浓缩的CH3NH3Br环境中,通过调节PbBr与PbC12的摩尔比,可以提高CH3NH3PbBr3,Clx薄膜的PL发射强度。此外,发现在前体溶液中的最佳CH 3 NH 3 Br / PbBr 2 / PbCl 2比可用于获得CH 3 NH 3 PbBr 3,C 1膜的最强PL发射强度。进一步的研究表明,CH3NH3Br和Cl的浓度均会显着影响CH3NH3PbBr3,Clx膜的演变,从而影响其PL性能。

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