2D Lead Iodide Perovskite with Mercaptan-Containing Amine and Its Exceptional Water Stability
| Autor: | Shuai-Kang Yu, Zhou-Hong Ren, Hang-Ling Zhai, Zhi-Ruo Zhang, Jie Dai, Qin-Yu Zhu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Phase transition 010405 organic chemistry Hydrogen bond Iodide Halide 010402 general chemistry 01 natural sciences 0104 chemical sciences law.invention Inorganic Chemistry Crystallography chemistry law Phase (matter) Amine gas treating Physical and Theoretical Chemistry Crystallization Perovskite (structure) |
| Zdroj: | Inorganic Chemistry. 60:9132-9140 |
| ISSN: | 1520-510X 0020-1669 |
| Popis: | Two dimensional (2D) hybrid perovskites have attracted a great deal of interest because of their appropriate photovoltaic efficiency and environmental stability. Although some 2D hybrid perovskites with sulfur-containing amines have been reported, the cation having the mercaptan group has not been well explored yet. In this work, cysteamine (Cya, HS(CH2)2NH2), a mercaptan-containing amine, was introduced into 2D hybrid perovskite. Two 2D lead iodides with different structures, (HCya)2PbI4 (1) and (HCya)7Pb4I15 (2), were isolated as a red low-temperature phase and a yellow high-temperature phase, respectively. X-ray single-crystal structural analysis showed that the red phase 1 is a single layered corner-shared perovskite and that the yellow phase 2 is a corner/edge-shared quasi-2D perovskite. A thermo-induced reversible 1 to 2 phase transition was found in this synthetic system. The configuration of HCya cation greatly influences the crystallization equilibrium, generating different structures of the lead halides. The single-crystal structure of 1 is discussed in comparison with that of (HAE)2PbI4 (AE = HO(CH2)2NH2), an analogue of 1. The different effects of OH and SH groups on the 2D frameworks are studied based on their hydrogen bonding properties. More remarkably, although the two perovskites have similar structures, the (HCya)2PbI4 (1) has an intrinsic water stability that is much more stable than (HAE)2PbI4, which should be attributed to the affinity of the SH group with lead on the surface of the lead halide. |
| Databáze: | OpenAIRE |
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