The Experts below are selected from a list of 4839 Experts worldwide ranked by ideXlab platform
Uwitonze Nestor - One of the best experts on this subject based on the ideXlab platform.
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Solvation Effect Facilitates Ion Transfer across Water/1,2‐Dichloroethane Interface
ChemElectroChem, 2016Co-Authors: Jacques Nsabimana, Uwitonze Nestor, Girum Girma, Ndagijimana Pamphile, Dongping Zhan, Zhong-qun TianAbstract:Ion transfer across the interface between two immiscible electrolytes can produce a Faraday current involving non-redox reactions, which is useful for both ion detection and phase-transfer catalysis. To decrease the transfer energy and improve the selectivity, artificial ligands are needed, which are usually unavailable because of the difficulty in the synthesis. Herein, we demonstrate that the Solvation Effect can act as the driving force for ion transfer across the micropipette-supported water/1,2-dichloroethane interface, including the anions SO42−, NO3−, NO2−, CO32−, and so forth. The thermodynamic properties are discussed, including the diffusion coefficients, Gibbs energy of ion transfer, stoichiometric ratios, and apparent association constants. Meanwhile, the research also provides a method to investigate the Solvation Effect.
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Facilitated Li+ ion transfer across the water/1,2-dichloroethane interface by the Solvation Effect
Chemical Communications, 2014Co-Authors: Uwitonze Nestor, Girum Girma, Yong Yang, Cunzhong Zhang, Dongping ZhanAbstract:We demonstrate that the Solvation Effect can be the driving force for ion transfer across the water/1,2-dichloroethane interface. Voltammetric behaviours of facilitated Li+ ion transfer by the solvents of lithium-based batteries are investigated, which is valuable for the dual-electrolyte Li–air batteries, but also for the ion detection, separation and extraction.
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facilitated li ion transfer across the water 1 2 dichloroethane interface by the Solvation Effect
Chemical Communications, 2014Co-Authors: Uwitonze Nestor, Girum Girma, Yong Yang, Cunzhong Zhang, Dongping ZhanAbstract:We demonstrate that the Solvation Effect can be the driving force for ion transfer across the water/1,2-dichloroethane interface. Voltammetric behaviours of facilitated Li+ ion transfer by the solvents of lithium-based batteries are investigated, which is valuable for the dual-electrolyte Li–air batteries, but also for the ion detection, separation and extraction.
Hongzheng Chen - One of the best experts on this subject based on the ideXlab platform.
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Solvation Effect in precursor solution enables over 16 efficiency in thick 2d perovskite solar cells
Journal of Materials Chemistry, 2019Co-Authors: Xiaomei Lian, Jiehuan Chen, Yingzhu Zhang, Thomas Rieks Andersen, Jun Ling, Gang Wu, Xinhui Lu, Deren Yang, Hongzheng ChenAbstract:High-quality thick light harvesting film is important for two-dimensional (2D) perovskite solar cells (PVSCs). The relationship between the structure of the second spacer cation (SSC+) in the precursor solution and the morphology of the perovskite film was studied. By applying structurally symmetric guanidinium (GA+) as a SSC+ and utilizing the Solvation Effect of GA+ in N,N-dimethylformamide (DMF), the solvent of the precursor, we realized the fabrication of 2D BA2MA4Pb5I16 (BA+ = butylammonium, MA+ = methylammonium) perovskite film with oriented crystal grains grown throughout the 530 nm thick film on a PEDOT:PSS substrate, which favored the fast transport of the charge carriers. The inverted planar-structured PVSCs exhibit a hero PCE of 14.94%. The device efficiency was further improved to 16.26%, one of the highest efficiencies reported for 2D PVSCs, through interface optimization via adding MACl into the precursor solution. The unsealed device exhibits moisture stability by retaining 90% of its initial PCE after 800 hours of exposure to air with a humidity of 55 ± 5%. This work provides a new approach toward high-performance 2D PVSCs in terms of both PCE and stability.
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Solvation Effect in precursor solution enables over 16% efficiency in thick 2D perovskite solar cells
Journal of Materials Chemistry, 2019Co-Authors: Xiaomei Lian, Jiehuan Chen, Yingzhu Zhang, Thomas Rieks Andersen, Jun Ling, Gang Wu, Xinhui Lu, Deren Yang, Hongzheng ChenAbstract:High-quality thick light harvesting film is important for two-dimensional (2D) perovskite solar cells (PVSCs). The relationship between the structure of the second spacer cation (SSC+) in the precursor solution and the morphology of the perovskite film was studied. By applying structurally symmetric guanidinium (GA+) as a SSC+ and utilizing the Solvation Effect of GA+ in N,N-dimethylformamide (DMF), the solvent of the precursor, we realized the fabrication of 2D BA2MA4Pb5I16 (BA+ = butylammonium, MA+ = methylammonium) perovskite film with oriented crystal grains grown throughout the 530 nm thick film on a PEDOT:PSS substrate, which favored the fast transport of the charge carriers. The inverted planar-structured PVSCs exhibit a hero PCE of 14.94%. The device efficiency was further improved to 16.26%, one of the highest efficiencies reported for 2D PVSCs, through interface optimization via adding MACl into the precursor solution. The unsealed device exhibits moisture stability by retaining 90% of its initial PCE after 800 hours of exposure to air with a humidity of 55 ± 5%. This work provides a new approach toward high-performance 2D PVSCs in terms of both PCE and stability.
Dongping Zhan - One of the best experts on this subject based on the ideXlab platform.
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Solvation Effect Facilitates Ion Transfer across Water/1,2‐Dichloroethane Interface
ChemElectroChem, 2016Co-Authors: Jacques Nsabimana, Uwitonze Nestor, Girum Girma, Ndagijimana Pamphile, Dongping Zhan, Zhong-qun TianAbstract:Ion transfer across the interface between two immiscible electrolytes can produce a Faraday current involving non-redox reactions, which is useful for both ion detection and phase-transfer catalysis. To decrease the transfer energy and improve the selectivity, artificial ligands are needed, which are usually unavailable because of the difficulty in the synthesis. Herein, we demonstrate that the Solvation Effect can act as the driving force for ion transfer across the micropipette-supported water/1,2-dichloroethane interface, including the anions SO42−, NO3−, NO2−, CO32−, and so forth. The thermodynamic properties are discussed, including the diffusion coefficients, Gibbs energy of ion transfer, stoichiometric ratios, and apparent association constants. Meanwhile, the research also provides a method to investigate the Solvation Effect.
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Facilitated Li+ ion transfer across the water/1,2-dichloroethane interface by the Solvation Effect
Chemical Communications, 2014Co-Authors: Uwitonze Nestor, Girum Girma, Yong Yang, Cunzhong Zhang, Dongping ZhanAbstract:We demonstrate that the Solvation Effect can be the driving force for ion transfer across the water/1,2-dichloroethane interface. Voltammetric behaviours of facilitated Li+ ion transfer by the solvents of lithium-based batteries are investigated, which is valuable for the dual-electrolyte Li–air batteries, but also for the ion detection, separation and extraction.
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facilitated li ion transfer across the water 1 2 dichloroethane interface by the Solvation Effect
Chemical Communications, 2014Co-Authors: Uwitonze Nestor, Girum Girma, Yong Yang, Cunzhong Zhang, Dongping ZhanAbstract:We demonstrate that the Solvation Effect can be the driving force for ion transfer across the water/1,2-dichloroethane interface. Voltammetric behaviours of facilitated Li+ ion transfer by the solvents of lithium-based batteries are investigated, which is valuable for the dual-electrolyte Li–air batteries, but also for the ion detection, separation and extraction.
Stephen R Forrest - One of the best experts on this subject based on the ideXlab platform.
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tuning the color emission of thin film molecular organic light emitting devices by the solid state Solvation Effect
Chemical Physics Letters, 1999Co-Authors: Vladimir Bulovic, R S Deshpande, Mark E Thompson, Stephen R ForrestAbstract:Abstract We demonstrate a general method for tuning the luminescent emission spectrum of dipolar molecules by adjusting the strength of intermolecular dipole–dipole interactions using a doped guest–host molecular organic thin film system. Spectral shifting is achieved by introducing dopants that change the local electric field in the film. This `solid state Solvation Effect' is used to continuously tune, by up to 75 nm, the peak emission wavelength of organic light emitting devices consisting of triarylamine host materials doped with polar luminescent dyes DCM2, aluminum tris (8-hydroxyquinoline), or both. Red, orange, yellow, green, blue, and white emission is demonstrated with the same set of organic molecules.
Xiaomei Lian - One of the best experts on this subject based on the ideXlab platform.
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Solvation Effect in precursor solution enables over 16 efficiency in thick 2d perovskite solar cells
Journal of Materials Chemistry, 2019Co-Authors: Xiaomei Lian, Jiehuan Chen, Yingzhu Zhang, Thomas Rieks Andersen, Jun Ling, Gang Wu, Xinhui Lu, Deren Yang, Hongzheng ChenAbstract:High-quality thick light harvesting film is important for two-dimensional (2D) perovskite solar cells (PVSCs). The relationship between the structure of the second spacer cation (SSC+) in the precursor solution and the morphology of the perovskite film was studied. By applying structurally symmetric guanidinium (GA+) as a SSC+ and utilizing the Solvation Effect of GA+ in N,N-dimethylformamide (DMF), the solvent of the precursor, we realized the fabrication of 2D BA2MA4Pb5I16 (BA+ = butylammonium, MA+ = methylammonium) perovskite film with oriented crystal grains grown throughout the 530 nm thick film on a PEDOT:PSS substrate, which favored the fast transport of the charge carriers. The inverted planar-structured PVSCs exhibit a hero PCE of 14.94%. The device efficiency was further improved to 16.26%, one of the highest efficiencies reported for 2D PVSCs, through interface optimization via adding MACl into the precursor solution. The unsealed device exhibits moisture stability by retaining 90% of its initial PCE after 800 hours of exposure to air with a humidity of 55 ± 5%. This work provides a new approach toward high-performance 2D PVSCs in terms of both PCE and stability.
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Solvation Effect in precursor solution enables over 16% efficiency in thick 2D perovskite solar cells
Journal of Materials Chemistry, 2019Co-Authors: Xiaomei Lian, Jiehuan Chen, Yingzhu Zhang, Thomas Rieks Andersen, Jun Ling, Gang Wu, Xinhui Lu, Deren Yang, Hongzheng ChenAbstract:High-quality thick light harvesting film is important for two-dimensional (2D) perovskite solar cells (PVSCs). The relationship between the structure of the second spacer cation (SSC+) in the precursor solution and the morphology of the perovskite film was studied. By applying structurally symmetric guanidinium (GA+) as a SSC+ and utilizing the Solvation Effect of GA+ in N,N-dimethylformamide (DMF), the solvent of the precursor, we realized the fabrication of 2D BA2MA4Pb5I16 (BA+ = butylammonium, MA+ = methylammonium) perovskite film with oriented crystal grains grown throughout the 530 nm thick film on a PEDOT:PSS substrate, which favored the fast transport of the charge carriers. The inverted planar-structured PVSCs exhibit a hero PCE of 14.94%. The device efficiency was further improved to 16.26%, one of the highest efficiencies reported for 2D PVSCs, through interface optimization via adding MACl into the precursor solution. The unsealed device exhibits moisture stability by retaining 90% of its initial PCE after 800 hours of exposure to air with a humidity of 55 ± 5%. This work provides a new approach toward high-performance 2D PVSCs in terms of both PCE and stability.