The Experts below are selected from a list of 2613 Experts worldwide ranked by ideXlab platform
Jianyong Ouyang - One of the best experts on this subject based on the ideXlab platform.
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highly efficient inverted polymer solar cells with indium tin oxide modified with solution processed Zwitterions as the transparent cathode
ACS Applied Materials & Interfaces, 2012Co-Authors: Baomin Zhao, Kaiyang Zeng, Amit Kumar, Jianyong OuyangAbstract:Polymer solar cells (PSCs) with inverted structure can greatly improve photovoltaic stability. This paper reports a novel method to lower the work function of indium tin oxide (ITO) through the modification with a thin layer of Zwitterions which have both positive and negative charges in the same molecule. Zwitterions have a strong dipole moment due to the presence of the two types of charges and are immobile under electric field. Zwitterions with both conjugated and saturated structure were investigated. A zwitterion thin layer is formed on ITO by spin coating a methanol solution of the zwitterion. The zwitterion-modified ITO sheets can be used as the cathode for the electron collection of inverted PSCs. The inverted poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PC(61)BM) PSCs can exhibit photovoltaic efficiency as high as 3.98% under simulated AM1.5G illumination (100 mW cm(-2)), which is comparable to that of PSCs with normal architecture. The effective electron collection by the zwitterion-modified ITO sheets is attributed to the reduction of the work function of ITO as a result of the dipole moment by the Zwitterions. The zwitterion modification can lower the work function of ITO by up to 0.97 eV. The photovoltaic performance of PSCs and the reduction in the work function of ITO strongly depend on the chemical structure of the Zwitterions.
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highly efficient inverted polymer solar cells with indium tin oxide modified with solution processed Zwitterions as the transparent cathode
ACS Applied Materials & Interfaces, 2012Co-Authors: Baomin Zhao, Kaiyang Zeng, Amit Kumar, Jianyong OuyangAbstract:Polymer solar cells (PSCs) with inverted structure can greatly improve photovoltaic stability. This paper reports a novel method to lower the work function of indium tin oxide (ITO) through the modification with a thin layer of Zwitterions which have both positive and negative charges in the same molecule. Zwitterions have a strong dipole moment due to the presence of the two types of charges and are immobile under electric field. Zwitterions with both conjugated and saturated structure were investigated. A zwitterion thin layer is formed on ITO by spin coating a methanol solution of the zwitterion. The zwitterion-modified ITO sheets can be used as the cathode for the electron collection of inverted PSCs. The inverted poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PC61BM) PSCs can exhibit photovoltaic efficiency as high as 3.98% under simulated AM1.5G illumination (100 mW cm–2), which is comparable to that of PSCs with normal architecture. The effective electron collection by the ...
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highly conductive pedot pss films prepared through a treatment with Zwitterions and their application in polymer photovoltaic cells
Journal of Materials Chemistry, 2010Co-Authors: Hongmei Zhang, Jianyong OuyangAbstract:This paper reports the significant conductivity enhancement of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films through a treatment with aqueous solutions of Zwitterions for the first time. The conductivity enhancement was dependent on the structure of the Zwitterions and the experimental conditions during the treatment, such as the concentration of the Zwitterions and the temperature. Conductivity enhancement from 0.2 to 92.4 S cm−1 was observed on PEDOT:PSS films after a zwitterion treatment. The chemical and physical characterizations indicate the lowering of the energy barrier for charge hopping across the PEDOT chains, the loss of poly(styrene sulfonate) acid (PSSH) chains from the PEDOT:PSS film, and the conformational change of the PEDOT chains after the zwitterion treatment. These highly conductive PEDOT:PSS films could be used to replace indium tin oxide (ITO) as the transparent anode of polymer photovoltaic cells (PVs). Power conversion efficiency as high as 2.48% was observed on the polymer PVs with a zwitterion-treated PEDOT:PSS film as the transparent anode.
Baomin Zhao - One of the best experts on this subject based on the ideXlab platform.
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highly efficient inverted polymer solar cells with indium tin oxide modified with solution processed Zwitterions as the transparent cathode
ACS Applied Materials & Interfaces, 2012Co-Authors: Baomin Zhao, Kaiyang Zeng, Amit Kumar, Jianyong OuyangAbstract:Polymer solar cells (PSCs) with inverted structure can greatly improve photovoltaic stability. This paper reports a novel method to lower the work function of indium tin oxide (ITO) through the modification with a thin layer of Zwitterions which have both positive and negative charges in the same molecule. Zwitterions have a strong dipole moment due to the presence of the two types of charges and are immobile under electric field. Zwitterions with both conjugated and saturated structure were investigated. A zwitterion thin layer is formed on ITO by spin coating a methanol solution of the zwitterion. The zwitterion-modified ITO sheets can be used as the cathode for the electron collection of inverted PSCs. The inverted poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PC(61)BM) PSCs can exhibit photovoltaic efficiency as high as 3.98% under simulated AM1.5G illumination (100 mW cm(-2)), which is comparable to that of PSCs with normal architecture. The effective electron collection by the zwitterion-modified ITO sheets is attributed to the reduction of the work function of ITO as a result of the dipole moment by the Zwitterions. The zwitterion modification can lower the work function of ITO by up to 0.97 eV. The photovoltaic performance of PSCs and the reduction in the work function of ITO strongly depend on the chemical structure of the Zwitterions.
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highly efficient inverted polymer solar cells with indium tin oxide modified with solution processed Zwitterions as the transparent cathode
ACS Applied Materials & Interfaces, 2012Co-Authors: Baomin Zhao, Kaiyang Zeng, Amit Kumar, Jianyong OuyangAbstract:Polymer solar cells (PSCs) with inverted structure can greatly improve photovoltaic stability. This paper reports a novel method to lower the work function of indium tin oxide (ITO) through the modification with a thin layer of Zwitterions which have both positive and negative charges in the same molecule. Zwitterions have a strong dipole moment due to the presence of the two types of charges and are immobile under electric field. Zwitterions with both conjugated and saturated structure were investigated. A zwitterion thin layer is formed on ITO by spin coating a methanol solution of the zwitterion. The zwitterion-modified ITO sheets can be used as the cathode for the electron collection of inverted PSCs. The inverted poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PC61BM) PSCs can exhibit photovoltaic efficiency as high as 3.98% under simulated AM1.5G illumination (100 mW cm–2), which is comparable to that of PSCs with normal architecture. The effective electron collection by the ...
Amit Kumar - One of the best experts on this subject based on the ideXlab platform.
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highly efficient inverted polymer solar cells with indium tin oxide modified with solution processed Zwitterions as the transparent cathode
ACS Applied Materials & Interfaces, 2012Co-Authors: Baomin Zhao, Kaiyang Zeng, Amit Kumar, Jianyong OuyangAbstract:Polymer solar cells (PSCs) with inverted structure can greatly improve photovoltaic stability. This paper reports a novel method to lower the work function of indium tin oxide (ITO) through the modification with a thin layer of Zwitterions which have both positive and negative charges in the same molecule. Zwitterions have a strong dipole moment due to the presence of the two types of charges and are immobile under electric field. Zwitterions with both conjugated and saturated structure were investigated. A zwitterion thin layer is formed on ITO by spin coating a methanol solution of the zwitterion. The zwitterion-modified ITO sheets can be used as the cathode for the electron collection of inverted PSCs. The inverted poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PC(61)BM) PSCs can exhibit photovoltaic efficiency as high as 3.98% under simulated AM1.5G illumination (100 mW cm(-2)), which is comparable to that of PSCs with normal architecture. The effective electron collection by the zwitterion-modified ITO sheets is attributed to the reduction of the work function of ITO as a result of the dipole moment by the Zwitterions. The zwitterion modification can lower the work function of ITO by up to 0.97 eV. The photovoltaic performance of PSCs and the reduction in the work function of ITO strongly depend on the chemical structure of the Zwitterions.
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highly efficient inverted polymer solar cells with indium tin oxide modified with solution processed Zwitterions as the transparent cathode
ACS Applied Materials & Interfaces, 2012Co-Authors: Baomin Zhao, Kaiyang Zeng, Amit Kumar, Jianyong OuyangAbstract:Polymer solar cells (PSCs) with inverted structure can greatly improve photovoltaic stability. This paper reports a novel method to lower the work function of indium tin oxide (ITO) through the modification with a thin layer of Zwitterions which have both positive and negative charges in the same molecule. Zwitterions have a strong dipole moment due to the presence of the two types of charges and are immobile under electric field. Zwitterions with both conjugated and saturated structure were investigated. A zwitterion thin layer is formed on ITO by spin coating a methanol solution of the zwitterion. The zwitterion-modified ITO sheets can be used as the cathode for the electron collection of inverted PSCs. The inverted poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PC61BM) PSCs can exhibit photovoltaic efficiency as high as 3.98% under simulated AM1.5G illumination (100 mW cm–2), which is comparable to that of PSCs with normal architecture. The effective electron collection by the ...
Kaiyang Zeng - One of the best experts on this subject based on the ideXlab platform.
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highly efficient inverted polymer solar cells with indium tin oxide modified with solution processed Zwitterions as the transparent cathode
ACS Applied Materials & Interfaces, 2012Co-Authors: Baomin Zhao, Kaiyang Zeng, Amit Kumar, Jianyong OuyangAbstract:Polymer solar cells (PSCs) with inverted structure can greatly improve photovoltaic stability. This paper reports a novel method to lower the work function of indium tin oxide (ITO) through the modification with a thin layer of Zwitterions which have both positive and negative charges in the same molecule. Zwitterions have a strong dipole moment due to the presence of the two types of charges and are immobile under electric field. Zwitterions with both conjugated and saturated structure were investigated. A zwitterion thin layer is formed on ITO by spin coating a methanol solution of the zwitterion. The zwitterion-modified ITO sheets can be used as the cathode for the electron collection of inverted PSCs. The inverted poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PC(61)BM) PSCs can exhibit photovoltaic efficiency as high as 3.98% under simulated AM1.5G illumination (100 mW cm(-2)), which is comparable to that of PSCs with normal architecture. The effective electron collection by the zwitterion-modified ITO sheets is attributed to the reduction of the work function of ITO as a result of the dipole moment by the Zwitterions. The zwitterion modification can lower the work function of ITO by up to 0.97 eV. The photovoltaic performance of PSCs and the reduction in the work function of ITO strongly depend on the chemical structure of the Zwitterions.
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highly efficient inverted polymer solar cells with indium tin oxide modified with solution processed Zwitterions as the transparent cathode
ACS Applied Materials & Interfaces, 2012Co-Authors: Baomin Zhao, Kaiyang Zeng, Amit Kumar, Jianyong OuyangAbstract:Polymer solar cells (PSCs) with inverted structure can greatly improve photovoltaic stability. This paper reports a novel method to lower the work function of indium tin oxide (ITO) through the modification with a thin layer of Zwitterions which have both positive and negative charges in the same molecule. Zwitterions have a strong dipole moment due to the presence of the two types of charges and are immobile under electric field. Zwitterions with both conjugated and saturated structure were investigated. A zwitterion thin layer is formed on ITO by spin coating a methanol solution of the zwitterion. The zwitterion-modified ITO sheets can be used as the cathode for the electron collection of inverted PSCs. The inverted poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PC61BM) PSCs can exhibit photovoltaic efficiency as high as 3.98% under simulated AM1.5G illumination (100 mW cm–2), which is comparable to that of PSCs with normal architecture. The effective electron collection by the ...
Marta E G Mosquera - One of the best experts on this subject based on the ideXlab platform.
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interaction of an imidazolium 2 amidinate nhc cdi zwitterion with zinc dichloride in dichloromethane role as ligands and c cl activation promoters
Chemical Communications, 2018Co-Authors: David Sanchezroa, Tomas Gil Santiago, Maria Fernandezmillan, Tomas Cuenca, Pilar Palma, Juan Campora, Marta E G MosqueraAbstract:Adducts of imidazolium carbenes and carbodiimides (NHC-CDI) are emerging as a new class of thermally stable and modular Zwitterions with many potential applications. Our study of the interaction of a representative NHC-CDI zwitterion with ZnCl2 in dichloromethane led to the serendipitous discovery of a highly selective, double activation of dichloromethane C–Cl bonds.
