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我院近期科研成果被国际学术媒体报道
张桥教授课题组与孙宝全教授课题组合作在Langmiur上发表论文
发布时间:2017-11-24 9:05:54 点击:

题目

Improving the Stability and Size Tunability of Cesium Lead Halide Perovskite Nanocrystals using Trioctylphosphine Oxide as the Capping Ligand

 

作者

Linzhong Wu, Qixuan Zhong, Di Yang, Min Chen, Huicheng Hu, Qi Pan, Haiyu Liu, Muhan Cao, Yong Xu, Baoquan Sun*, and Qiao Zhang*

 

单位

Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu 215123, P. R. China

 

摘要

Recently, all-inorganic cesium lead halide (CsPbX3, X = Cl, Br, I) nanocrystals (NCs) have drawn wide attention because of their excellent optoelectronic properties and potential applications. However, one of the most significant challenges of such NCs is their low stability against protonic solvent. In this work, we demonstrate that by incorporating a highly-branched capping ligand, trioctylphosphine oxide (TOPO), into the traditional oleic acid/oleylamine system, monodisperse CsPbX3 NCs with excellent optoelectronic properties can be achieved at elevated temperatures (up to 260 oC). The size of such NCs can be varied in a relatively wide range. The capping of TOPO on NCs has been verified through FTIR measurement. More importantly, the presence of TOPO can dramatically improve the stability of CsPbX3 NCs against ethanol treatment. After ethanol treatment for 100 min, the emission intensity of TOPO-capped sample dropped only 5%, while that of non-TOPO capped NCs dropped up to 86%. This work may shed some light on the preparation and application of CsPbX3 NCs with higher stability.

 

影响因子

3.833

 

分区情况:

二区

 

链接:

http://pubs.acs.org/doi/10.1021/acs.langmuir.7b02963

 

                                                                                                                                             责任编辑:向丹婷



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