Enhanced stability of CsPbBr3 Quantum Dots by anchoring on the hierarchical three-dimensional layered double hydroxide

Enhanced stability of CsPbBr3 Quantum Dots by anchoring on the hierarchical three-dimensional layered double hydroxide
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通过锚定在分层三维层状双氢氧化物上增强 CsPbBr3 量子点的稳定性

DOI:
10.1016/j.cej.2021.130471
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发表时间:
2021
期刊:
Chem. Eng. J.
影响因子:
--
通讯作者:
Y.H. Gao
Y.H. Gao
中科院分区:
其他
文献类型:
--
作者:
P.F. Ma;Y.X. Hou;Z.Y. Chen;J. Su;L.Y. Li;N.S. Liu;Z. Zhang;X.L. Jiang;F. Long;Y.N. Ma;Y.H. Gao

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全无机钙钛矿量子点虽然具有优异的发光性能,但其稳定性差限制了其在光电子领域的应用。在此,我们提出了一种选择性的成核生长策略,通过锚定CsPbBr 3QDs胺化分级三维层状双氢氧化物(A3 D-LDH)。氨基与Pb ~(2+)之间的强相互作用赋予了A_3D-LDH的锚定作用。配合花状结构的隔离效应,A3 D-LDH/CsPbBr 3复合材料表现出较高的固体光致发光量子产率(82.35%),并增强了对恶劣环境(潮湿空气、光照和热)的稳定性,这归因于CsPbBr 3量子点的限制聚集和表面钝化。利用这些优点,通过引入A3 D-LDH/CsPbBr 3复合材料作为绿色荧光粉,制备了高效的白色发光二极管(LED),其色坐标为(0.349,0.349),相关色温为4841 K。我们相信,我们的方法提供了一个有前途的候选人,固态照明和显示。
The poor stability of all-inorganic perovskite quantum dots (QDs) limits its application in the field of optoelectronics although it possesses prominent luminescent properties. Herein, we proposed a selective nucleation-growth strategy through anchoring the CsPbBr3QDs on the aminated hierarchical three-dimensional layered double hydroxide (A3D-LDH). The strong interaction between the amino group and Pb2+endows the anchoring effect of A3D-LDH. Coordinated with the isolation effect of flower-like structure, the A3D-LDH/CsPbBr3composites exhibited high solid photo-luminescence quantum yield (82.35%) and enhanced stability against the adverse environment (humidity air, irradiation, and heat), which is attributed to restricted aggregation and surface passivation of CsPbBr3QDs. Benefiting from the advantageous properties, an efficient white light-emitting diode (LED) is fabricated by introducing A3D-LDH/CsPbBr3composites as green phosphors with color coordinates (0.349, 0.349) at a correlated color temperature of 4841 K. We believe that our method offered a promising candidate for solid-state lighting and display.
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