Tuning Dielectric Transitions in Two-Dimensional Organic–Inorganic Hybrid Lead Halide Perovskites

Autor:	Zhe-Kun Xu, Tian Gan, Zhong-Xia Wang, Xue-Qin Huang, Hang Yu
Rok vydání:	2021
Předmět:	Phase transition Band gap Chemistry Halide Dielectric Crystal structure Crystal engineering law.invention Inorganic Chemistry Chemical physics law Solar cell Physical and Theoretical Chemistry Perovskite (structure)
Zdroj:	Inorganic Chemistry. 60:16871-16877
ISSN:	1520-510X 0020-1669
Popis:	Organic-inorganic hybrid metal halide perovskites possessing unique two-dimensional (2D)-layered structures have been demonstrated with excellent molecular tunability and stability, especially the promising semiconductor properties for solar cell applications. In this work, three 2D lead halide organic-inorganic hybrid perovskites (IAA)2PbX4 (IAA = isoamylammonium cation and X = Cl, Br, and I) were synthesized by employing a solution processing method and demonstrate distinct tuning solid-state phase transitions coupled with dielectric responses, as well as light absorption properties. Among the title perovskites, the phase transition temperature decreases gradually, and their band gap also indicates a narrowing trend. The results are mainly derived from slight changes in the crystal structure by halogen regulation. These findings might provide an effective crystal engineering strategy for exploring high-performance functional perovskite materials.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7eb15d5324068483c42ea22afe444ec4 https://doi.org/10.1021/acs.inorgchem.1c02897 Zobrazit plný text záznamu