Simultaneous enhancement of luminescence and stability of lead halide perovskites by a diatomite microcavity for light-emitting diodes
Simultaneous enhancement of luminescence and stability of lead halide perovskites by a diatomite microcavity for light-emitting diodes
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DOI：
10.1016/j.cej.2020.128056
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发表时间：
2020-12
影响因子：
15.1
通讯作者：
Jiarui Hao;Z. Dai;Mengyu Guan;Peipei Dang;Hongquan Wang;Chunjie Yan;Jun Lin;Guogang Li
中科院分区：
文献类型：
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作者：
Jiarui Hao;Z. Dai;Mengyu Guan;Peipei Dang;Hongquan Wang;Chunjie Yan;Jun Lin;Guogang Li
卤化铅钙钛矿量子点（Pe QDs）是光电领域的革命，并具有相当大的应用潜力。然而，同时促进高发光性能和优异的稳定性仍然是其实际应用的主要挑战。本论文利用具有天然光学微腔的铯盐矿物构建了聚丙烯酸接枝的铯盐（DE-g-PAA）介导反应器，用于原位合成CsPbX_3QD（X = Cl，Br和I）。所制备的CPB（CsPbBr 3）-DE-g-PAA复合发光体不仅保持了CPB的33.1% ± 0.5%的光致发光量子产率（76.4% ± 0.7%），而且具有优异的热稳定性和耐水性。通过电磁场模拟，进一步证实了这种发光的改善是由于均匀尺寸腔体的共振效应引起的电磁场增强。该研究为利用具有准光子晶体结构的天然粘土矿物实现稳定高效的CsPbX 3QD基多功能材料提供了新的见解。
Lead halide perovskite quantum dots (Pe QDs) are revolutionizing the photoelectric field and hold considerable potential for future applications. However, the simultaneous promotion of both high luminescence performance and excellent stability is still a major challenge for its practical application. Herein, we presented a diatomite mineral with naturally optical microcavity is used to construct polyacrylic acid-grafted diatomite (DE-g-PAA) mediate reactors for in-situ crafting CsPbX3QDs (X = Cl, Br and I). The as-prepared CPB (CsPbBr3) -DE-g-PAA composite emitters not only preserve a higher photoluminescence quantum yield about 76.4% ± 0.7% compared to 33.1% ± 0.5% for CPB but also present outstanding thermal stability and water-resistance property. This luminescence improvement further be confirmed as the electromagnetic field enhancement from resonance effect of cavities with uniform size in the diatomite via electromagnetic field simulations. This study provides new insights for achieving stable and highly efficient CsPbX3QDs-based multifunctional materials using natural clay minerals with quasi-photonic crystal structure.