高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (12): 3774.doi: 10.7503/cjcu20210358

• 材料化学 • 上一篇    

反溶剂法快速合成高效发光二维锡卤钙钛矿材料

刘瑶, 邓正涛()   

  1. 南京大学现代工程与应用科学学院, 南京 210023
  • 收稿日期:2021-05-24 出版日期:2021-12-10 发布日期:2021-08-11
  • 通讯作者: 邓正涛 E-mail:dengz@nju.edu.cn
  • 基金资助:
    国家自然科学基金(22075129);江苏省自然科学基金(BZ2018008)

Fast Synthesis of Highly Luminescent Two-dimensional Tin-halide Perovskites by Anti-solvent Method

LIU Yao, DENG Zhengtao()   

  1. College of Engineering and Applied Sciences,Nanjing University,Nanjing 210023,China
  • Received:2021-05-24 Online:2021-12-10 Published:2021-08-11
  • Contact: DENG Zhengtao E-mail:dengz@nju.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22075129);the Natural Science Foundation of Jiangsu Province, China(BZ2018008)

摘要:

铅卤钙钛矿材料由于其优异的光电性质而受到了广泛关注. 但是, 材料中铅的毒性问题极大地阻碍了其大规模应用. 因此, 寻找与铅卤钙钛矿具有相似光电性质的非铅卤化物钙钛矿材料十分重要. 其中, 锡基卤化物钙钛矿被认为是铅基钙钛矿材料最佳的替代材料之一. 本文通过简便的反溶剂方法, 合成了一系列新型二维(RNH3)2SnX4(R为烷基链, X=Br-, I-)钙钛矿材料. 研究结果表明, 所合成的材料具有优异的荧光发射性质, 发光量子效率高达98.5%, 比三维ASnX3[A=Cs+, 甲胺(MA+), 甲脒(FA+)等]型钙钛矿表现出更好的稳定性. 本文所采用的合成方法简单易行, 有利于实现金属卤化物钙钛矿材料的大规模合成及在固态照明器件和显示器件领域的工业应用.

关键词: 二维锡卤钙钛矿, 反溶剂法, 高效发光, 高稳定性, 发光二极管

Abstract:

In recent years, lead halide perovskites have attracted extensive attention due to their remarkable optoelectronic properties. However, the toxicity of lead in materials has greatly hindered their large-scale commercial applications. Therefore, it is very important to find lead-free halide perovskite materials with similar photoelectric properties as lead halide perovskite materials. Among the lead-free halide perovskites, tin-halide perovskite is considered as one of the best substitutes for lead based perovskite materials. Herein, a series of novel two-dimensional(2D) (RNH32SnX4(R is alkyl chain, X=Br-, I-) perovskite materials was synthesized by a simple antisolvent method, which have excellent fluorescence emission properties with photoluminescence quantum yield(PLQY) up to 98%. It was found that the prepared materials are more stable than 3D ASnX3-type[A=Cs+, methylammonium(MA+), formamidinium(FA+)] ones. This work lays a foundation for the industrial application of metal halide perovskite materials in solid-state lighting devices and display devices.

Key words: 2D Tin-halide perovskite, Anti-solvent method, Highly luminescent, High stability, Light- emitting diode

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