Unveiling the Influence of Organic Chain Length on the Physical Properties of Two-Dimensional Cobalt-Based Hybrid Perovskites

Recent interest in two-dimensional (2D) lead-free hybrid organic–inorganic perovskites (HOIPs) has driven significant progress in the development of magnetic and electronic materials. Herein, we systematically compare a series of low-temperature growth of 2D cobalt-based HOIPs (Co-HOIPs) by varying the methylene chain length (n) of n = 1, 2, 3, and 4, for the first time. The Co-HOIP crystal structure with a single carbon chain displays a monoclinic arrangement with a space group of P21/c, while those with two, three, and four methylene chain lengths manifest triclinic crystal structures with a space group of P1. The optical measurements exhibit apparent odd–even effects as a function of the length of the organic ligand. The first-order phase transitions of BA2CoCl4 are distinctly observed at temperatures of 12.46 and 139.77 °C compared to the shorter EA2CoCl4 counterparts. Notably, this particular compound exhibits the highest magnetic saturation and coercive fields with Ms = 0.160 emu/g and Hc = 19.416 T, respectively. Furthermore, BA2CoCl4 demonstrates superior dielectric properties, as evidenced by the shortest diameter of the equivalent circuit in EIS. These findings underscore the potential of BA2CoCl4 for diverse applications in magnetic and electronic devices, highlighting its promising role in advanced technological applications

Unveiling the Influence of Organic Chain Length on the Physical Properties of Two-Dimensional Cobalt-Based Hybrid Perovskites

Recent interest in two-dimensional (2D) lead-free hybrid organic–inorganic perovskites (HOIPs) has driven significant progress in the development of magnetic and electronic materials. Herein, we systematically compare a series of low-temperature growth of 2D cobalt-based HOIPs (Co-HOIPs) by varying the methylene chain length (n) of n = 1, 2, 3, and 4, for the first time. The Co-HOIP crystal structure with a single carbon chain displays a monoclinic arrangement with a space group of P21/c, while those with two, three, and four methylene chain lengths manifest triclinic crystal structures with a space group of P1. The optical measurements exhibit apparent odd–even effects as a function of the length of the organic ligand. The first-order phase transitions of BA2CoCl4 are distinctly observed at temperatures of 12.46 and 139.77 °C compared to the shorter EA2CoCl4 counterparts. Notably, this particular compound exhibits the highest magnetic saturation and coercive fields with Ms = 0.160 emu/g and Hc = 19.416 T, respectively. Furthermore, BA2CoCl4 demonstrates superior dielectric properties, as evidenced by the shortest diameter of the equivalent circuit in EIS. These findings underscore the potential of BA2CoCl4 for diverse applications in magnetic and electronic devices, highlighting its promising role in advanced technological applications

Unveiling the Influence of Organic Chain Length on the Physical Properties of Two-Dimensional Cobalt-Based Hybrid Perovskites

Recent interest in two-dimensional (2D) lead-free hybrid organic–inorganic perovskites (HOIPs) has driven significant progress in the development of magnetic and electronic materials. Herein, we systematically compare a series of low-temperature growth of 2D cobalt-based HOIPs (Co-HOIPs) by varying the methylene chain length (n) of n = 1, 2, 3, and 4, for the first time. The Co-HOIP crystal structure with a single carbon chain displays a monoclinic arrangement with a space group of P21/c, while those with two, three, and four methylene chain lengths manifest triclinic crystal structures with a space group of P1. The optical measurements exhibit apparent odd–even effects as a function of the length of the organic ligand. The first-order phase transitions of BA2CoCl4 are distinctly observed at temperatures of 12.46 and 139.77 °C compared to the shorter EA2CoCl4 counterparts. Notably, this particular compound exhibits the highest magnetic saturation and coercive fields with Ms = 0.160 emu/g and Hc = 19.416 T, respectively. Furthermore, BA2CoCl4 demonstrates superior dielectric properties, as evidenced by the shortest diameter of the equivalent circuit in EIS. These findings underscore the potential of BA2CoCl4 for diverse applications in magnetic and electronic devices, highlighting its promising role in advanced technological applications

Organic Chain Length Effect on Trap States of Lead Halide Perovskite Scintillators

Scintillators fabricated from organic–inorganic layered perovskites have attracted wide attention due to their excellent properties, including fast decay times, superior light yield, and high exciton binding energy. In relation to their optoelectronic properties, hybrid organic–inorganic perovskites are known for their tunability, which could be manipulated by modifying the organic cations. In this study, we investigate the optical and scintillation properties of lead halide perovskites A2PbBr4, where A vary from amylammonium (AA), hexylammonium (HA), octylammonium (OA), and benzylammonium (BZA) organic ligands. Photoluminescence (PL) spectra display dual peaks due to surface and bulk trap states contributions, while fast average decay times from time-resolved photoluminescence (TRPL) for all samples are within the range of 0.69 ± 0.11–0.99 ± 0.13 ns. The optical band gap of these hybrid perovskites is within ∼3 eV range, which fulfill the criteria of promising scintillators. Radioluminescence (RL) spectra show negative thermal quenching behavior (NTQ) in all samples, with the AA2PbBr4 peak intensity appearing at relatively lower temperature compared to other samples. Thermoluminescence (TL) measurement reveals trap-free states in AA2PbBr4, while other samples possess shallow traps (<40 meV) as well as low trap density, which is beneficial for fast-decay scintillators, X-ray detection and energy conversion for solar cells. Overall, our results demonstrate that the extension of linear organic chains in lead-based perovskite is a deterministic strategy for a fast response hybrid-based scintillator to date

Organic Chain Length Effect on Trap States of Lead Halide Perovskite Scintillators

Scintillators fabricated from organic–inorganic layered perovskites have attracted wide attention due to their excellent properties, including fast decay times, superior light yield, and high exciton binding energy. In relation to their optoelectronic properties, hybrid organic–inorganic perovskites are known for their tunability, which could be manipulated by modifying the organic cations. In this study, we investigate the optical and scintillation properties of lead halide perovskites A2PbBr4, where A vary from amylammonium (AA), hexylammonium (HA), octylammonium (OA), and benzylammonium (BZA) organic ligands. Photoluminescence (PL) spectra display dual peaks due to surface and bulk trap states contributions, while fast average decay times from time-resolved photoluminescence (TRPL) for all samples are within the range of 0.69 ± 0.11–0.99 ± 0.13 ns. The optical band gap of these hybrid perovskites is within ∼3 eV range, which fulfill the criteria of promising scintillators. Radioluminescence (RL) spectra show negative thermal quenching behavior (NTQ) in all samples, with the AA2PbBr4 peak intensity appearing at relatively lower temperature compared to other samples. Thermoluminescence (TL) measurement reveals trap-free states in AA2PbBr4, while other samples possess shallow traps (<40 meV) as well as low trap density, which is beneficial for fast-decay scintillators, X-ray detection and energy conversion for solar cells. Overall, our results demonstrate that the extension of linear organic chains in lead-based perovskite is a deterministic strategy for a fast response hybrid-based scintillator to date

Organic Chain Length Effect on Trap States of Lead Halide Perovskite Scintillators

Scintillators fabricated from organic–inorganic layered perovskites have attracted wide attention due to their excellent properties, including fast decay times, superior light yield, and high exciton binding energy. In relation to their optoelectronic properties, hybrid organic–inorganic perovskites are known for their tunability, which could be manipulated by modifying the organic cations. In this study, we investigate the optical and scintillation properties of lead halide perovskites A2PbBr4, where A vary from amylammonium (AA), hexylammonium (HA), octylammonium (OA), and benzylammonium (BZA) organic ligands. Photoluminescence (PL) spectra display dual peaks due to surface and bulk trap states contributions, while fast average decay times from time-resolved photoluminescence (TRPL) for all samples are within the range of 0.69 ± 0.11–0.99 ± 0.13 ns. The optical band gap of these hybrid perovskites is within ∼3 eV range, which fulfill the criteria of promising scintillators. Radioluminescence (RL) spectra show negative thermal quenching behavior (NTQ) in all samples, with the AA2PbBr4 peak intensity appearing at relatively lower temperature compared to other samples. Thermoluminescence (TL) measurement reveals trap-free states in AA2PbBr4, while other samples possess shallow traps (<40 meV) as well as low trap density, which is beneficial for fast-decay scintillators, X-ray detection and energy conversion for solar cells. Overall, our results demonstrate that the extension of linear organic chains in lead-based perovskite is a deterministic strategy for a fast response hybrid-based scintillator to date

Unveiling the Influence of Organic Chain Length on the Physical Properties of Two-Dimensional Cobalt-Based Hybrid Perovskites

Recent interest in two-dimensional (2D) lead-free hybrid organic–inorganic perovskites (HOIPs) has driven significant progress in the development of magnetic and electronic materials. Herein, we systematically compare a series of low-temperature growth of 2D cobalt-based HOIPs (Co-HOIPs) by varying the methylene chain length (n) of n = 1, 2, 3, and 4, for the first time. The Co-HOIP crystal structure with a single carbon chain displays a monoclinic arrangement with a space group of P21/c, while those with two, three, and four methylene chain lengths manifest triclinic crystal structures with a space group of P1. The optical measurements exhibit apparent odd–even effects as a function of the length of the organic ligand. The first-order phase transitions of BA2CoCl4 are distinctly observed at temperatures of 12.46 and 139.77 °C compared to the shorter EA2CoCl4 counterparts. Notably, this particular compound exhibits the highest magnetic saturation and coercive fields with Ms = 0.160 emu/g and Hc = 19.416 T, respectively. Furthermore, BA2CoCl4 demonstrates superior dielectric properties, as evidenced by the shortest diameter of the equivalent circuit in EIS. These findings underscore the potential of BA2CoCl4 for diverse applications in magnetic and electronic devices, highlighting its promising role in advanced technological applications

Unveiling the Influence of Organic Chain Length on the Physical Properties of Two-Dimensional Cobalt-Based Hybrid Perovskites

Recent interest in two-dimensional (2D) lead-free hybrid organic–inorganic perovskites (HOIPs) has driven significant progress in the development of magnetic and electronic materials. Herein, we systematically compare a series of low-temperature growth of 2D cobalt-based HOIPs (Co-HOIPs) by varying the methylene chain length (n) of n = 1, 2, 3, and 4, for the first time. The Co-HOIP crystal structure with a single carbon chain displays a monoclinic arrangement with a space group of P21/c, while those with two, three, and four methylene chain lengths manifest triclinic crystal structures with a space group of P1. The optical measurements exhibit apparent odd–even effects as a function of the length of the organic ligand. The first-order phase transitions of BA2CoCl4 are distinctly observed at temperatures of 12.46 and 139.77 °C compared to the shorter EA2CoCl4 counterparts. Notably, this particular compound exhibits the highest magnetic saturation and coercive fields with Ms = 0.160 emu/g and Hc = 19.416 T, respectively. Furthermore, BA2CoCl4 demonstrates superior dielectric properties, as evidenced by the shortest diameter of the equivalent circuit in EIS. These findings underscore the potential of BA2CoCl4 for diverse applications in magnetic and electronic devices, highlighting its promising role in advanced technological applications

Organic Chain Length Effect on Trap States of Lead Halide Perovskite Scintillators

Scintillators fabricated from organic–inorganic layered perovskites have attracted wide attention due to their excellent properties, including fast decay times, superior light yield, and high exciton binding energy. In relation to their optoelectronic properties, hybrid organic–inorganic perovskites are known for their tunability, which could be manipulated by modifying the organic cations. In this study, we investigate the optical and scintillation properties of lead halide perovskites A2PbBr4, where A vary from amylammonium (AA), hexylammonium (HA), octylammonium (OA), and benzylammonium (BZA) organic ligands. Photoluminescence (PL) spectra display dual peaks due to surface and bulk trap states contributions, while fast average decay times from time-resolved photoluminescence (TRPL) for all samples are within the range of 0.69 ± 0.11–0.99 ± 0.13 ns. The optical band gap of these hybrid perovskites is within ∼3 eV range, which fulfill the criteria of promising scintillators. Radioluminescence (RL) spectra show negative thermal quenching behavior (NTQ) in all samples, with the AA2PbBr4 peak intensity appearing at relatively lower temperature compared to other samples. Thermoluminescence (TL) measurement reveals trap-free states in AA2PbBr4, while other samples possess shallow traps (<40 meV) as well as low trap density, which is beneficial for fast-decay scintillators, X-ray detection and energy conversion for solar cells. Overall, our results demonstrate that the extension of linear organic chains in lead-based perovskite is a deterministic strategy for a fast response hybrid-based scintillator to date