Cesium lead halide perovskite nanocrystals for ultraviolet and blue light blocking

作     者：Guihua Huang Yipeng Huang Wei Xu Qiuhong Yao Xiaofang Liu Caifeng Ding Xi Chen 

作者机构：Institute of Analytical Technology and Smart InstrumentsCollege of Environment and Public HealthXiamen Huaxia UniversityXiamen 361024China State Key Laboratory of Marine Environmental ScienceXiamen UniversityXiamen 361005China Department of AnesthesiologyXiamen Maternal and Children HospitalXiamen 361003China Key Laboratory of Sensor Analysis of Tumor MarkerMinistry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2019年第30卷第5期

页      面：1021-1023页

核心收录：

学科分类：07[理学] 0703[理学-化学] 

基　　金：financially supported by the National Nature Scientific Foundation of China(No.21675133)and OESACLS201902 

主　　题：Perovskite nanocrystals UV blocking Blue light blocking Cesium lead halide nanocrystals Tunable adsorption edge 

摘      要：Using cesium lead halide perovskite nanocrystals, CsPb(Cl/Br)3, as a light absorber, we report a highly effective UV and blue light blocking film. The CsPb(Cl/Br)3 nanocrystals are well dispersed in the ethyl cellulose(EC) matrix to compose a UV and blue light shielding film, and the absorption edge of the film is tunable by adjusting Cl to Br ratio using anion exchange. The CsPbCl2 Br-EC film exhibits a transmittance of 5% at 459 nm, 90% at 478 nm and 95% in the range of 500–800 nm, which makes it excellent for UV and blue light shielding. In addition, the as-prepared EC-CsPb(Cl/Br)3 film shows excellent photostability under UV irradiation. Results demonstrate that this EC-CsPb(Cl/Br)3 based materials with sharp absorbance edges, tunable blocking wavelength, and high photostability can be useful for the applications in UV and blue light blocking and optical filters.