基于原位法制备的钙钛矿量子点的发光稳定性探究

Study on Luminescence Stability of Perovskite Quantum Dots Prepared by In-situ Method

摘要: 针对钙钛矿量子点材料的稳定性问题,采用原位法制备了CsPbBr₃钙钛矿发光薄膜,并通过X射线衍射和AFM图像对薄膜进行了结构表征。利用355 nm的紫外光对薄膜进行了泵浦,研究了该薄膜被多次加热、降温以及泡水后的荧光变化。实验发现,此方法制备的钙钛矿薄膜在被多次加热后,降温过程中荧光具有可恢复性,同时泡水后具有很好的疏水稳定性.

Abstract: CsPbBr₃ perovskite light-emitting thin films was prepared by an in-situ method in response to the stability problem of perovskite quantum dots materials. The structure was characterized by X-ray diffraction and AFM image. The fluorescence changes of the film were investigated after being heated and cooled down several times and after soaking in water when the film was pumped by a 355 nm UV light source. The results showed that the perovskite light-emitting thin films prepared by this method had recoverable fluorescence after being heated several times and during the cooling process, as well as good hydrophobic stability after soaking in water.