Highly luminescent and stable CsPbBr3 perovskite quantum dots modified by phosphine ligands
Highly luminescent and stable CsPbBr3 perovskite quantum dots modified by phosphine ligands
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膦配体修饰的高发光稳定CsPbBr3钙钛矿量子点
DOI：
10.1007/s12274-019-2289-8
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发表时间：
2019-04-01
期刊：
影响因子：
9.9
通讯作者：
Zhao, Lianjing
中科院分区：
文献类型：
--
作者：
Li, Yan;Wang, Xiaoyan;Zhao, Lianjing
全无机铯铅卤化物钙钛矿量子点（QDs）由于其优异的光电性能，近年来在光电器件如发光二极管、光电探测器和太阳能电池等方面有着广阔的应用前景。尽管如此，纳米晶体的稳定性问题仍然是其实际应用的瓶颈。在此，我们报道了一种简便的方法，合成了一系列膦配体修饰的CsPbBr3量子点，具有高的PL强度。通过引入有机膦配体，CsPbBr3量子点对乙醇、水和紫外光的耐受性得到显著提高。此外，沉积在玻璃基板上的膦配体修饰的量子点薄膜表现出比原始量子点薄膜更好的上级PL强度和光学稳定性。
All-inorganic cesium lead halide perovskite quantum dots (QDs) have been a promising candidate for optoelectronic devices in recent years, such as light-emitting diodes, photodetectors and solar cells, owing to their superb optoelectronic properties. Still, the stability issue of nanocrystals is a bottleneck for their practical application. Herein, we report a facile method for the synthesis of a series of phosphine ligand modified CsPbBr3 QDs with high PL intensity. By introducing organic phosphine ligands, the tolerance of CsPbBr3 QDs to ethanol, water and UV light was dramatically improved. Moreover, the phosphine ligand modified QD films deposited on the glass subtracts exhibit superior PL intensity and optical stability to those of pristine QD based films.