Designable Layer Edge States in Quasi-2D Perovskites Induced by Femtosecond Pulse Laser

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Yu Miao
  • Zeqi Xiao
  • Zeyu Zheng
  • Da Lyu
  • Qin Liu
  • Jieyu Wu
  • Yongbo Wu
  • Lingling Shui
  • Xiaowen Hu
  • Kai Wang
  • Zhilie Tang
  • Xiao-Fang Jiang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number2201046
Journal / PublicationAdvanced Science
Volume9
Issue number20
Online published12 May 2022
Publication statusPublished - 15 Jul 2022

Link(s)

Abstract

The low-energy layer edge states (LESs) from quasi 2D hybrid perovskite single crystals have shown great potential because of their nontrivial photoelectrical properties. However, the underlying formation mechanism of the LESs still remains controversial. Also, the presence or creation of the LESs is of high randomness due to the lack of proper techniques to manually generate these LESs. Herein, using a single crystals platform of quasi-2D (BA)2(MA)n−1PbnI3n+1 (n > 1) perovskites, the femtosecond laser ablation approach to design and write the LESs with a high spatial resolution is reported. Fundamentally, these LESs are of smaller bandgap 3D MAPbI3 nanocrystals which are formed by the laser-induced BA escaping from the lattice and thus the lattice shrinkage from quasi-2D to 3D structures. Furthermore, by covering the crystal with tape, an additional high-energy emission state corresponding to the reformation of (BA)2PbI4 (n = 1) within the irradiation region is generated. This work presents a simple and efficient protocol to manually write LESs on single crystals and thus lays the foundation for utilizing these LESs to further enhance the performance of future photoelectronic devices.

Research Area(s)

  • femtosecond pulsed laser, laser ablation, layer edge states, photoluminescence, quasi-2D perovskites

Citation Format(s)

Designable Layer Edge States in Quasi-2D Perovskites Induced by Femtosecond Pulse Laser. / Miao, Yu; Xiao, Zeqi; Zheng, Zeyu; Lyu, Da; Liu, Qin; Wu, Jieyu; Wu, Yongbo; Wen, Xiewen; Shui, Lingling; Hu, Xiaowen; Wang, Kai; Tang, Zhilie; Jiang, Xiao-Fang.

In: Advanced Science, Vol. 9, No. 20, 2201046, 15.07.2022.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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