TY - JOUR

T1 - The effect of precursor concentrations on the structure and optoelectronic properties of quasi low-dimensional hybrid 2-methylpyridinium lead bromide crystalline phases

AU - Штарев , Дмитрий Сергеевич

AU - Чаплыгина, Дарья Александровна

AU - Патрушева, О. В.

AU - Chen, C.

AU - Штарева, Анна Владимировна

AU - Стомпос, Константинос

AU - Кеворкянц, Руслан Эдуардович

AU - Емелин, Алексей Владимирович

PY - 2024

Y1 - 2024

N2 - This work reports on the synthesis and optoelectronic properties of the crystalline phases [Pb 2 Br 5 ][C 6 NH 8 ] and [PbBr 3 ][C 6 NH 8 ] of 2-methylpyridinium lead bromide. Their synthesis is achieved through varying reactant concentrations. The first... This work reports on the synthesis and optoelectronic properties of the crystalline phases [Pb 2 Br 5 ][C 6 NH 8 ] and [PbBr 3 ][C 6 NH 8 ] of 2-methylpyridinium lead bromide. Their synthesis is achieved through varying reactant concentrations. The first phase is an organometal compound with a corrugated quasi 2D structure, while the second one is a 1D hybrid structure. Optical bandgaps of the compounds are ~3.4 eV and match the results of DFT calculations. Whereas their photoluminescence (PL) excitation spectra are nearly identical, the corresponding PL emission spectra are different and show maxima at 2.22 eV and 2.84 eV for [Pb 2 Br 5 ][C 6 NH 8 ] and [PbBr 3 ][C 6 NH 8 ], respectively. The comparison of the experimental and theoretical results suggests an existence of radiationless electronic transitions from the inorganic subsystem onto the π-electron system of 2-methylpyridinium cation.

AB - This work reports on the synthesis and optoelectronic properties of the crystalline phases [Pb 2 Br 5 ][C 6 NH 8 ] and [PbBr 3 ][C 6 NH 8 ] of 2-methylpyridinium lead bromide. Their synthesis is achieved through varying reactant concentrations. The first... This work reports on the synthesis and optoelectronic properties of the crystalline phases [Pb 2 Br 5 ][C 6 NH 8 ] and [PbBr 3 ][C 6 NH 8 ] of 2-methylpyridinium lead bromide. Their synthesis is achieved through varying reactant concentrations. The first phase is an organometal compound with a corrugated quasi 2D structure, while the second one is a 1D hybrid structure. Optical bandgaps of the compounds are ~3.4 eV and match the results of DFT calculations. Whereas their photoluminescence (PL) excitation spectra are nearly identical, the corresponding PL emission spectra are different and show maxima at 2.22 eV and 2.84 eV for [Pb 2 Br 5 ][C 6 NH 8 ] and [PbBr 3 ][C 6 NH 8 ], respectively. The comparison of the experimental and theoretical results suggests an existence of radiationless electronic transitions from the inorganic subsystem onto the π-electron system of 2-methylpyridinium cation.

UR - https://www.mendeley.com/catalogue/2b97a555-1c3d-3b62-8b1d-51dbb2dfa1b2/

U2 - 10.1039/d4tc00271g

DO - 10.1039/d4tc00271g

M3 - Article

VL - 12

SP - 5596

EP - 5607

JO - Journal of Materials Chemistry C

JF - Journal of Materials Chemistry C

SN - 2050-7526

IS - 15

ER -