Structural modulation of 2D and quasi-2D perovskite single crystals via ion doping

IF 1.7 4区材料科学 Q3 CRYSTALLOGRAPHY

Journal of Crystal Growth Pub Date : 2025-02-04 DOI:10.1016/j.jcrysgro.2025.128091

Renjia Li, Haoze Wang, Ziluo Fei, Jiapeng Li, Qikai Wang, Qinghua Kong, Qiuhong Cui

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引用次数: 0

Abstract

Two-dimensional (2D) and quasi-2D perovskites have been extensively studied due to their enhanced environmental stability while retaining the excellent properties of three-dimensional (3D) perovskites. Herein, we prepared 2D and quasi-2D perovskite single crystals using space-confined solution method and re-precipitation method, respectively. Moreover, the structural modulation of prepared single-crystal perovskites (2D and quasi-2D) was explored through ion doping, which helps to thoroughly investigate the properties of perovskites. The results show that in (PEA)₂Pb(Br_1-xCl_x)₄ perovskites, as the ratio of chloride ions to bromide ions increases, lattice distortion occurs, leading to exciton-phonon coupling and the transition from narrow-band emission to broadband emission. In (PEA)₂(MA)_n-1Pb_nBr_3n+1 perovskites, MA⁺ can modulate the number of layers in (PEA)₂(MA)_n-1Pb_nBr_3n+1, thereby precisely tuning the bandgap and controlling the emission range. The comprehensive study of doping in regulating the structure and properties of perovskite single crystals provides an important approach for precisely controlling their structure and properties for the potential applications in optoelectronic devices such as LEDs and photodetectors.

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来源期刊

Journal of Crystal Growth 化学-晶体学

CiteScore

3.60

自引率

11.10%

发文量

373

审稿时长

65 days

期刊介绍： The journal offers a common reference and publication source for workers engaged in research on the experimental and theoretical aspects of crystal growth and its applications, e.g. in devices. Experimental and theoretical contributions are published in the following fields: theory of nucleation and growth, molecular kinetics and transport phenomena, crystallization in viscous media such as polymers and glasses; crystal growth of metals, minerals, semiconductors, superconductors, magnetics, inorganic, organic and biological substances in bulk or as thin films; molecular beam epitaxy, chemical vapor deposition, growth of III-V and II-VI and other semiconductors; characterization of single crystals by physical and chemical methods; apparatus, instrumentation and techniques for crystal growth, and purification methods; multilayer heterostructures and their characterisation with an emphasis on crystal growth and epitaxial aspects of electronic materials. A special feature of the journal is the periodic inclusion of proceedings of symposia and conferences on relevant aspects of crystal growth.