The Experts below are selected from a list of 281412 Experts worldwide ranked by ideXlab platform
Elad Harel - One of the best experts on this subject based on the ideXlab platform.
-
cation engineering in two dimensional ruddlesden popper lead iodide perovskites with mixed large a site Cations in the cages
Journal of the American Chemical Society, 2020Co-Authors: Xinyi Jiang, Claudine Katan, Boubacar Traore, Ioannis Spanopoulos, Jacky Even, Mercouri G Kanatzidis, Elad HarelAbstract:The Goldschmidt tolerance factor in halide perovskites limits the number of Cations that can enter their cages without destabilizing their overall structure. Here, we have explored the limits of this geometric factor and found that the ethylammonium (EA) Cations which lie outside the tolerance factor range can still enter the cages of the 2D halide perovskites by stretching them. The new perovskites allow us to study how these large Cations occupying the perovskite cages affect the structural, optical, and electronic properties. We report a series of cation engineered 2D Ruddlesden-Popper lead iodide perovskites (BA)2(EAxMA1-x)2Pb3I10 (x = 0-1, BA is n-butylammonium, MA is methylammonium) by the incorporation of a large EA cation in the cage. An analysis of the single-crystal structures reveals that the incorporation of EA in the cage significantly stretches Pb-I bonds, expands the cage, and induces a larger octahedral distortion in the inorganic framework. Spectroscopic and theoretical studies show that such structural deformation leads to a blue-shifted bandgap, sub-bandgap trap states with wider energetic distribution, and stronger photoluminescence quenching. These results enrich the family of 2D perovskites and provide new insights for understanding the structure-property relationship in perovskite materials.
-
cation engineering in two dimensional ruddlesden popper lead iodide perovskites with mixed large a site Cations in the cages
Journal of the American Chemical Society, 2020Co-Authors: Yongping Fu, Claudine Katan, Boubacar Traore, Ioannis Spanopoulos, Xinyi Jiang, Jacky Even, Mercouri G Kanatzidis, Xiaotong Li, Elad HarelAbstract:The Goldschmidt tolerance factor in halide perovskites limits the number of Cations that can enter their cages without destabilizing their overall structure. Here, we have explored the limits of this geometric factor and found that the ethylammonium (EA) Cations which lie outside the tolerance factor range can still enter the cages of the 2D halide perovskites by stretching them. The new perovskites allow us to study how these large Cations occupying the perovskite cages affect the structural, optical, and electronic properties. We report a series of cation engineered 2D Ruddlesden–Popper lead iodide perovskites (BA)2(EAxMA1–x)2Pb3I10 (x = 0–1, BA is n-butylammonium, MA is methylammonium) by the incorporation of a large EA cation in the cage. An analysis of the single-crystal structures reveals that the incorporation of EA in the cage significantly stretches Pb–I bonds, expands the cage, and induces a larger octahedral distortion in the inorganic framework. Spectroscopic and theoretical studies show that ...
Boubacar Traore - One of the best experts on this subject based on the ideXlab platform.
-
cation engineering in two dimensional ruddlesden popper lead iodide perovskites with mixed large a site Cations in the cages
Journal of the American Chemical Society, 2020Co-Authors: Xinyi Jiang, Claudine Katan, Boubacar Traore, Ioannis Spanopoulos, Jacky Even, Mercouri G Kanatzidis, Elad HarelAbstract:The Goldschmidt tolerance factor in halide perovskites limits the number of Cations that can enter their cages without destabilizing their overall structure. Here, we have explored the limits of this geometric factor and found that the ethylammonium (EA) Cations which lie outside the tolerance factor range can still enter the cages of the 2D halide perovskites by stretching them. The new perovskites allow us to study how these large Cations occupying the perovskite cages affect the structural, optical, and electronic properties. We report a series of cation engineered 2D Ruddlesden-Popper lead iodide perovskites (BA)2(EAxMA1-x)2Pb3I10 (x = 0-1, BA is n-butylammonium, MA is methylammonium) by the incorporation of a large EA cation in the cage. An analysis of the single-crystal structures reveals that the incorporation of EA in the cage significantly stretches Pb-I bonds, expands the cage, and induces a larger octahedral distortion in the inorganic framework. Spectroscopic and theoretical studies show that such structural deformation leads to a blue-shifted bandgap, sub-bandgap trap states with wider energetic distribution, and stronger photoluminescence quenching. These results enrich the family of 2D perovskites and provide new insights for understanding the structure-property relationship in perovskite materials.
-
cation engineering in two dimensional ruddlesden popper lead iodide perovskites with mixed large a site Cations in the cages
Journal of the American Chemical Society, 2020Co-Authors: Yongping Fu, Claudine Katan, Boubacar Traore, Ioannis Spanopoulos, Xinyi Jiang, Jacky Even, Mercouri G Kanatzidis, Xiaotong Li, Elad HarelAbstract:The Goldschmidt tolerance factor in halide perovskites limits the number of Cations that can enter their cages without destabilizing their overall structure. Here, we have explored the limits of this geometric factor and found that the ethylammonium (EA) Cations which lie outside the tolerance factor range can still enter the cages of the 2D halide perovskites by stretching them. The new perovskites allow us to study how these large Cations occupying the perovskite cages affect the structural, optical, and electronic properties. We report a series of cation engineered 2D Ruddlesden–Popper lead iodide perovskites (BA)2(EAxMA1–x)2Pb3I10 (x = 0–1, BA is n-butylammonium, MA is methylammonium) by the incorporation of a large EA cation in the cage. An analysis of the single-crystal structures reveals that the incorporation of EA in the cage significantly stretches Pb–I bonds, expands the cage, and induces a larger octahedral distortion in the inorganic framework. Spectroscopic and theoretical studies show that ...
Xinyi Jiang - One of the best experts on this subject based on the ideXlab platform.
-
cation engineering in two dimensional ruddlesden popper lead iodide perovskites with mixed large a site Cations in the cages
Journal of the American Chemical Society, 2020Co-Authors: Xinyi Jiang, Claudine Katan, Boubacar Traore, Ioannis Spanopoulos, Jacky Even, Mercouri G Kanatzidis, Elad HarelAbstract:The Goldschmidt tolerance factor in halide perovskites limits the number of Cations that can enter their cages without destabilizing their overall structure. Here, we have explored the limits of this geometric factor and found that the ethylammonium (EA) Cations which lie outside the tolerance factor range can still enter the cages of the 2D halide perovskites by stretching them. The new perovskites allow us to study how these large Cations occupying the perovskite cages affect the structural, optical, and electronic properties. We report a series of cation engineered 2D Ruddlesden-Popper lead iodide perovskites (BA)2(EAxMA1-x)2Pb3I10 (x = 0-1, BA is n-butylammonium, MA is methylammonium) by the incorporation of a large EA cation in the cage. An analysis of the single-crystal structures reveals that the incorporation of EA in the cage significantly stretches Pb-I bonds, expands the cage, and induces a larger octahedral distortion in the inorganic framework. Spectroscopic and theoretical studies show that such structural deformation leads to a blue-shifted bandgap, sub-bandgap trap states with wider energetic distribution, and stronger photoluminescence quenching. These results enrich the family of 2D perovskites and provide new insights for understanding the structure-property relationship in perovskite materials.
-
cation engineering in two dimensional ruddlesden popper lead iodide perovskites with mixed large a site Cations in the cages
Journal of the American Chemical Society, 2020Co-Authors: Yongping Fu, Claudine Katan, Boubacar Traore, Ioannis Spanopoulos, Xinyi Jiang, Jacky Even, Mercouri G Kanatzidis, Xiaotong Li, Elad HarelAbstract:The Goldschmidt tolerance factor in halide perovskites limits the number of Cations that can enter their cages without destabilizing their overall structure. Here, we have explored the limits of this geometric factor and found that the ethylammonium (EA) Cations which lie outside the tolerance factor range can still enter the cages of the 2D halide perovskites by stretching them. The new perovskites allow us to study how these large Cations occupying the perovskite cages affect the structural, optical, and electronic properties. We report a series of cation engineered 2D Ruddlesden–Popper lead iodide perovskites (BA)2(EAxMA1–x)2Pb3I10 (x = 0–1, BA is n-butylammonium, MA is methylammonium) by the incorporation of a large EA cation in the cage. An analysis of the single-crystal structures reveals that the incorporation of EA in the cage significantly stretches Pb–I bonds, expands the cage, and induces a larger octahedral distortion in the inorganic framework. Spectroscopic and theoretical studies show that ...
Claudine Katan - One of the best experts on this subject based on the ideXlab platform.
-
cation engineering in two dimensional ruddlesden popper lead iodide perovskites with mixed large a site Cations in the cages
Journal of the American Chemical Society, 2020Co-Authors: Xinyi Jiang, Claudine Katan, Boubacar Traore, Ioannis Spanopoulos, Jacky Even, Mercouri G Kanatzidis, Elad HarelAbstract:The Goldschmidt tolerance factor in halide perovskites limits the number of Cations that can enter their cages without destabilizing their overall structure. Here, we have explored the limits of this geometric factor and found that the ethylammonium (EA) Cations which lie outside the tolerance factor range can still enter the cages of the 2D halide perovskites by stretching them. The new perovskites allow us to study how these large Cations occupying the perovskite cages affect the structural, optical, and electronic properties. We report a series of cation engineered 2D Ruddlesden-Popper lead iodide perovskites (BA)2(EAxMA1-x)2Pb3I10 (x = 0-1, BA is n-butylammonium, MA is methylammonium) by the incorporation of a large EA cation in the cage. An analysis of the single-crystal structures reveals that the incorporation of EA in the cage significantly stretches Pb-I bonds, expands the cage, and induces a larger octahedral distortion in the inorganic framework. Spectroscopic and theoretical studies show that such structural deformation leads to a blue-shifted bandgap, sub-bandgap trap states with wider energetic distribution, and stronger photoluminescence quenching. These results enrich the family of 2D perovskites and provide new insights for understanding the structure-property relationship in perovskite materials.
-
cation engineering in two dimensional ruddlesden popper lead iodide perovskites with mixed large a site Cations in the cages
Journal of the American Chemical Society, 2020Co-Authors: Yongping Fu, Claudine Katan, Boubacar Traore, Ioannis Spanopoulos, Xinyi Jiang, Jacky Even, Mercouri G Kanatzidis, Xiaotong Li, Elad HarelAbstract:The Goldschmidt tolerance factor in halide perovskites limits the number of Cations that can enter their cages without destabilizing their overall structure. Here, we have explored the limits of this geometric factor and found that the ethylammonium (EA) Cations which lie outside the tolerance factor range can still enter the cages of the 2D halide perovskites by stretching them. The new perovskites allow us to study how these large Cations occupying the perovskite cages affect the structural, optical, and electronic properties. We report a series of cation engineered 2D Ruddlesden–Popper lead iodide perovskites (BA)2(EAxMA1–x)2Pb3I10 (x = 0–1, BA is n-butylammonium, MA is methylammonium) by the incorporation of a large EA cation in the cage. An analysis of the single-crystal structures reveals that the incorporation of EA in the cage significantly stretches Pb–I bonds, expands the cage, and induces a larger octahedral distortion in the inorganic framework. Spectroscopic and theoretical studies show that ...
Ioannis Spanopoulos - One of the best experts on this subject based on the ideXlab platform.
-
cation engineering in two dimensional ruddlesden popper lead iodide perovskites with mixed large a site Cations in the cages
Journal of the American Chemical Society, 2020Co-Authors: Xinyi Jiang, Claudine Katan, Boubacar Traore, Ioannis Spanopoulos, Jacky Even, Mercouri G Kanatzidis, Elad HarelAbstract:The Goldschmidt tolerance factor in halide perovskites limits the number of Cations that can enter their cages without destabilizing their overall structure. Here, we have explored the limits of this geometric factor and found that the ethylammonium (EA) Cations which lie outside the tolerance factor range can still enter the cages of the 2D halide perovskites by stretching them. The new perovskites allow us to study how these large Cations occupying the perovskite cages affect the structural, optical, and electronic properties. We report a series of cation engineered 2D Ruddlesden-Popper lead iodide perovskites (BA)2(EAxMA1-x)2Pb3I10 (x = 0-1, BA is n-butylammonium, MA is methylammonium) by the incorporation of a large EA cation in the cage. An analysis of the single-crystal structures reveals that the incorporation of EA in the cage significantly stretches Pb-I bonds, expands the cage, and induces a larger octahedral distortion in the inorganic framework. Spectroscopic and theoretical studies show that such structural deformation leads to a blue-shifted bandgap, sub-bandgap trap states with wider energetic distribution, and stronger photoluminescence quenching. These results enrich the family of 2D perovskites and provide new insights for understanding the structure-property relationship in perovskite materials.
-
cation engineering in two dimensional ruddlesden popper lead iodide perovskites with mixed large a site Cations in the cages
Journal of the American Chemical Society, 2020Co-Authors: Yongping Fu, Claudine Katan, Boubacar Traore, Ioannis Spanopoulos, Xinyi Jiang, Jacky Even, Mercouri G Kanatzidis, Xiaotong Li, Elad HarelAbstract:The Goldschmidt tolerance factor in halide perovskites limits the number of Cations that can enter their cages without destabilizing their overall structure. Here, we have explored the limits of this geometric factor and found that the ethylammonium (EA) Cations which lie outside the tolerance factor range can still enter the cages of the 2D halide perovskites by stretching them. The new perovskites allow us to study how these large Cations occupying the perovskite cages affect the structural, optical, and electronic properties. We report a series of cation engineered 2D Ruddlesden–Popper lead iodide perovskites (BA)2(EAxMA1–x)2Pb3I10 (x = 0–1, BA is n-butylammonium, MA is methylammonium) by the incorporation of a large EA cation in the cage. An analysis of the single-crystal structures reveals that the incorporation of EA in the cage significantly stretches Pb–I bonds, expands the cage, and induces a larger octahedral distortion in the inorganic framework. Spectroscopic and theoretical studies show that ...
