Intermediate phase-assisted solution preparation of two dimensional CsPbCl3 perovskite for efficient ultraviolet photodetection

An innovative intermediate-phase assisted synthesis of two dimensional CsPbCl3 perovskite is proposed. The novel strategy addresses the poor solution processability of Cl-type halide perovskites, and endows the 2D CsPbCl3 with high crystallinity and large lateral size to realize efficient ultraviole...

Full description

Saved in:
Bibliographic Details
Published in:Journal of colloid and interface science 2019-10, Vol.554, p.619-626
Main Authors: Hu, Han, Han, Zeyao, Huang, Bo, Dong, Yuhang, Zou, Yousheng
Format: Article
Language:English
Subjects:
2D halide perovskite
CsPbCl3
Halide perovskite
Solution preparation
Ultraviolet photodetection
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An innovative intermediate-phase assisted synthesis of two dimensional CsPbCl3 perovskite is proposed. The novel strategy addresses the poor solution processability of Cl-type halide perovskites, and endows the 2D CsPbCl3 with high crystallinity and large lateral size to realize efficient ultraviolet light sensing. [Display omitted] Fully-inorganic halide perovskites (HPs) have realized respectable progress in multiple optoelectronic applications. However, Cl-based fully-inorganic HPs that are ideal for ultraviolet (UV) photodetection applications in high demand still remain rarely explored mainly due to the poor solution processability compared with other counterparts. Here we propose a facile solution method to fabricate CsPbCl3 with not only high crystallinity but also a two dimensional (2D) morphology for efficient UV photodetection. 2D Ruddlesden-Popper perovskites (RPPs) are firstly prepared as the intermediate phase, which habitually grow into microplates owing to an intrinsic 2D structure. Then Cs+ was introduced in the form of highly soluble cesium acetate to exchange with the organic cations in the RPPs to produce 2D CsPbCl3 with preserved morphology and micron scale size. By this chemical route, the poor solubility issue can be addressed. All the procedures are conducted at room temperature in open air. The perfect band gap, high crystallinity and 2D morphology promise superior UV light sensing capability, one of the best overall performances featuring high responsivity, fast response speed, low driving voltages and good stability is obtained. This work is believed to fill in the “Cl-gap” for this promising class of material.
ISSN:0021-9797
1095-7103
DOI:10.1016/j.jcis.2019.07.044