A 9R-Type Hexagonal Perovskite Polytype Structure, Me<sub>3</sub>HyPbBr<sub>3</sub>, Exhibits Reversible Phase Transition and Fluorescent Semiconductor Properties
Recently, organic–inorganic hybrid perovskites with their unique physicochemical properties have become a vibrant frontier of research. Here, we report a novel organic–inorganic hybrid phase transition material, Me3HyPbBr3 (Me3Hy+ = 1,1,1-trimethylhydrazine), and explore its thermal, structural, and optical properties. X-ray diffraction shows that Me3HyPbBr3 belongs to the R3̅m, R3̅, and R3̅m space groups in the low-temperature (LTP), intermediate-temperature (ITP), and high-temperature (HTP) phases, respectively. In addition, the compound has a unique structure, a 9R-type hexagonal perovskite polytype structure, and the inorganic framework is alternately connected by tetrahedral and octahedral [PbBr3]−. Differential scanning calorimetry (DSC) tests showed that the compound underwent a reversible phase transition near 262 and 215 K. In addition, Me3HyPbBr3 possesses semiconducting and fluorescent properties with a band-gap value of 2.91 eV, a photoluminescence (PL) peak located at 518 nm, and a quantum yield of 17.95%, suggesting its potential for optoelectronic applications.
Authors
- Nan Ma
- Yu‐Hui Tan (ORCID: https://orcid.org/0000-0003-2029-3747)
- Chun Cheng Yang (ORCID: https://orcid.org/0000-0002-2888-8860)
- Jing Wei (ORCID: https://orcid.org/0000-0003-2991-0123)
- Meng‐Na Wang
- Rong-Jie Hao
- Xixi Wang
Institutions
- Jiangxi University of Science and Technology (CN)
Publication Details
- Journal
- Crystal Growth & Design
- Published
- 2024-08-26
- DOI
- https://doi.org/10.1021/acs.cgd.4c00952
- Citations
- 3
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.63
Funders
- National Natural Science Foundation of China
- Education Department of Jiangxi Province
- Key Research and Development Program of Jiangxi Province