Mechanochemical synthesis of one-dimensional (1D) hybrid perovskites incorporating polycyclic aromatic spacers: Highly fluorescent cation-based materials

Three polycyclic aromatic cations, 2-ammonium fluorene (AF), 2-ammonium anthracene (AA) and 2,7-diammonium fluorene (DAF) are successfully assembled with inorganic PbBr6 octahedra to synthesize (AF/AA)2PbBr4 and (DAF)PbBr4 one-dimensional (1D) hybrid perovskites. The synthesis of the perovskites is performed via an environmentally-friendly mechanochemical approach involving a solid-state solventless reaction. The analysis of the X-ray powder diffraction (XRD) data revealed that the crystal structure of these materials consisted of quasi-linear wires of PbBr4 2- separated by polycyclic cations with alternating positions of NH3 + groups. DFT calculations have shown a remarkable contribution of the orbitals of 2-ammonium fluorene to both the valence band maximum (VBM) and conduction band minimum (CBM) of the (AF)2PbBr4 structure. Moreover, the same hybrid materials were effectively prepared as thin films by using the spin-coating method from a solution containing the precursors. Although these hybrid perovskites are not intrinsically emissive, the strong fluorescence signal from the organic cation is preserved. © The Royal Society of Chemistry 2018.

Авторы
García-Espejo G.1 , Rodríguez-Padrón D.2 , Pérez-Morales M.1 , Luque R. 2, 3 , De Miguel G. , Camacho L.1
Редакторы
-
Издательство
Royal Society of Chemistry
Номер выпуска
28
Язык
Английский
Страницы
7677-7682
Статус
Опубликовано
Подразделение
-
Номер
-
Том
6
Год
2018
Организации
  • 1 Departamento de Química Física, Instituto Universitario de Investigación en Química Fina y Nanoquímica, IUQFN, Universidad de Córdoba, Campus de Rabanales Edificio Marie Curie, Córdoba, E-14071, Spain
  • 2 Departamento de Química Orgánica, Grupo FQM-383, Instituto Universitario de Investigación de Química Fina y Nanoquímica (IUIQFN), Universidad de Córdoba Campus de Rabanales, Edificio Marie Curie (C-3), Ctra Nnal IV-A, Km 396, Córdoba, Spain
  • 3 Peoples Friendship University of Russia, RUDN University, 6 Miklukho-Maklaya str., Moscow, 117198, Russian Federation
Ключевые слова
Aromatic hydrocarbons; Bromine compounds; Crystal structure; Films; Fluorescence; Lead compounds; Perovskite; Positive ions; Solid state reactions; X ray powder diffraction; Conduction-band minimum; Fluorescence signals; Mechanochemical synthesis; Mechanochemicals; Polycyclic aromatics; Solventless reactions; Spin-coating method; Valence-band maximums; Hybrid materials
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/7049/