中国物理B ›› 2019, Vol. 28 ›› Issue (8): 86102-086102.doi: 10.1088/1674-1056/28/8/086102
• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇 下一篇
Zhaohui Shen(申朝晖), Pengjie Song(宋鹏杰), Bo Qiao(乔泊), Jingyue Cao(曹靖玥), Qiongyu Bai(白琼宇), Dandan Song(宋丹丹), Zheng Xu(徐征), Suling Zhao(赵谡玲), Gaoqian Zhang(张高倩), Yuanjun Wu(吴元均)
Zhaohui Shen(申朝晖)1,2, Pengjie Song(宋鹏杰)1,2, Bo Qiao(乔泊)1,2, Jingyue Cao(曹靖玥)1,2, Qiongyu Bai(白琼宇)1,2, Dandan Song(宋丹丹)1,2, Zheng Xu(徐征)1,2, Suling Zhao(赵谡玲)1,2, Gaoqian Zhang(张高倩)1,2, Yuanjun Wu(吴元均)3
摘要:
Inorganic lead halide perovskite nanocrystals (NCs) with superior photoelectric properties are expected to have excellent performance in many fields. However, the anion exchange changes their features and is unfavorable for their applications in many fields. Hence, impeding anion exchange is important for improving the composition stability of inorganic lead halide perovskite NCs. Herein, CsPbX3 (X=Cl, Br) NCs are coated with Cs4PbX6 shell to impede anion exchange and reduce anion mobility. The Cs4PbX6 shell is facily fabricated on CsPbX3 NCs through high temperature injection method. Anion exchange experiments demonstrate that the Cs4PbX6 shell completely encapsulates CsPbX3 NCs and greatly improves the composition stability of CsPbX3 NCs. Moreover, our work also sheds light on the potential design approaches of various heterostructures to expand the application of CsPbM3 (M=Cl, Br, I) NCs.
中图分类号: (Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots))