Super-hydrophobic Cs4PbBr6@PDB composites with water-driven photoluminescence enhancement and dehydration recovery
Super-hydrophobic Cs4PbBr6@PDB composites with water-driven photoluminescence enhancement and dehydration recovery
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具有水驱动光致发光增强和脱水恢复功能的超疏水Cs4PbBr6@PDB复合材料
DOI：
10.1016/j.cej.2022.135077
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发表时间：
2022-02
期刊：
影响因子：
--
通讯作者：
Y.H. Gao
中科院分区：
文献类型：
--
作者：
P.F. Ma;Y.X. Hou;Y.F. Zheng;J. Su;L. Li;N.S. Liu;Z. Zhang;Y.N. Ma;Y.H. Gao
·PDB的超疏水多孔结构增强了可逆的变色性。·Cs_4PbBr6@PdB具有稳定的可逆开关发光性能。·Cs 4 PbBr6@PDB发光油墨在防伪领域开辟了一条道路。全无机钙钛矿量子点(QD)对水敏感，在水相关的光致发光中具有很好的应用前景。本工作首次尝试将Cs4PbBr6量子点吸附到超疏水的聚二乙烯基苯(PDB)多孔骨架中。在PDB的保护下，不发光的Cs4PbBr6和发光的CsPbBr3通过交替的水处理(过量或少量)和除水而可逆地转变。用水提取CsBr，并通过蒸发将CsBr重新插入量子点中，构成了一个可逆的相变过程。PDB的超疏水多孔结构不仅为溶解的CsBR提供了有限的空间，而且还抑制了捕获的CsBR的溢出，从而减少了过量水对可逆变色的不利影响。这为理解Cs4PbBr6和CsPbBr3之间的相变提供了一个新的视角。此外，丝网印刷水性发光油墨中的Cs_4PbBr_6@PdB具有良好的加密和解密稳定性，为防伪领域开辟了一条新的途径。
• The super-hydrophobic porous structure of PDB enhances reversible hydrochromism. • The Cs 4 PbBr 6 @PDB shows stable performance about reversible switching luminescence. • The Cs 4 PbBr 6 @PDB luminescent inks open a way in the field of anti-counterfeiting. All-inorganic perovskite quantum dots (QDs) are very promising materials for their potential applications in water-related photoluminescence due to their sensitive properties to water. This work initiatively attempts to absorb Cs 4 PbBr 6 QDs into a super-hydrophobic polydivinylbenzene (PDB) porous framework. Under the protection of PDB, the non-luminescent Cs 4 PbBr 6 and luminescent CsPbBr 3 transform reversibly by alternate water treatment (excess or small amount) and removal of water. The extraction of CsBr by water and reinsertion of CsBr by evaporation from/into the QDs make up a reversible phase transformation process. The super-hydrophobic porous structure of PDB not only provides the confined space for dissolved CsBr but also inhibits the overflow of trapped CsBr, thereby reducing the adverse impact of excess water on reversible hydrochromism. This work provided a new perspective to understand the phase conversion between Cs 4 PbBr 6 and CsPbBr 3 . Furthermore, the Cs 4 PbBr 6 @PDB in waterborne luminescent inks by screen printing opens a way in the field of anti-counterfeiting owing to the excellent stability of encryption and decryption.
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