A Strategy toward New Low-Dimensional Hybrid Halide Perovskites with Anionic Spacers

Yizhou Zhao; Siyu Zhang; Yue Lu; Shangui Lan; Cheng Zhu; Jiawen Xiao; Huachao Zai; Manling Sui; Dehui Li; Huanping Zhou; Yujing Li; Qi Chen

doi:10.1002/smll.201804152

A Strategy toward New Low-Dimensional Hybrid Halide Perovskites with Anionic Spacers

Small. 2019 Feb;15(6):e1804152. doi: 10.1002/smll.201804152. Epub 2019 Jan 15.

Authors

Yizhou Zhao¹, Siyu Zhang¹, Yue Lu², Shangui Lan³, Cheng Zhu¹, Jiawen Xiao¹, Huachao Zai¹, Manling Sui², Dehui Li³, Huanping Zhou⁴, Yujing Li¹, Qi Chen¹

Affiliations

¹ Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. China.
² Institute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing, 100124, P. R. China.
³ School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China.
⁴ Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China.

PMID: 30645019
DOI: 10.1002/smll.201804152

Abstract

The low-dimensional halide perovskites have received enormous attention due to their unique photovoltaic and optoelectronic performances. Periodic spacers are used to inhibit the growth of 3D perovskite and fabricate a 2D counterpart with layered structure, mostly based on organic/inorganic cations. Herein, by introducing organic anions (e.g., pentanedioic acid (PDA) and hexanedioic acid (HDA) simultaneously), leaf-shaped (Cs₃ Pb₂ Br₅ )₂ (PDA-HDA) microplates with low-dimensional structure are synthesized. They also exhibit significant photoluminescence (PL) centered at 540 nm with a narrow emission peak. The synthesis of single crystals of Pb(PDA) and Pb(HDA) allows to further clarify the crystal structure of (Cs₃ Pb₂ Br₅ )₂ (PDA-HDA) perovskite and its structural evolution mechanism. Moreover, the cooperative introduction of dicarboxylic acid pairs with appropriate lengths is thermodynamically favored for the low-dimensional perovskite crystallization. The temperature-dependent PL indicates a V-shaped Stokes shift with elevated temperature that could be associated with the localization of excitons in the inorganic layers between organic dicarboxylic acid molecules. This work demonstrates low-dimensional halide perovskite with anionic spacers, which also opens up a new approach to the growth of low-dimensional organic-inorganic hybrid perovskite crystals.

Keywords: halide perovskites; low-dimensional materials; nanocrystals; photoluminescence.

Abstract

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