The Experts below are selected from a list of 21 Experts worldwide ranked by ideXlab platform
Jaleesa Brooks - One of the best experts on this subject based on the ideXlab platform.
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Novel Organic and Polymeric Materials for Solar Energy Conversions
Energy Procedia, 2020Co-Authors: Jaleesa Brooks, Thuong Nguyen, Amanda Harding, Dan Wang, Tanya DavidAbstract:Abstract Organic or ‘plastic’ solar cells are attractive for solar photoelectric energy conversion applications where low cost (such as large area), lightweight, and flexible shape are desired. The photoelectric power conversion efficiencies of currently reported organic/polymeric photovoltaic materials are still relatively low (typically less than 10% under AM 1.5 and one Sun intensity), and the three major losses are still severe, i.e., the ‘Photon loss’ due to mismatch of materials energy gaps versus the Sunlight Photon energies, the ‘exciton loss’ and the ‘carrier loss’ due to poor solid state morphologies of existing polymeric donor/acceptor binary systems. Therefore, both molecular frontier orbitals (HOMOs, LUMOs) and phase morphologies need to be engineered to further enhance the efficiency. In this paper, our recent efforts on frontier orbital and energy gap engineering and terminal functionalizations of conjugated polymer blocks, and a donor-bridge-acceptor type block copolymer approach will be reviewed. For instance, a new donor-bridge-acceptor or DBA type conjugated block copolymer system has been successfully synthesized, characterized, and solar cells based on the new materials has been preliminarily tested revealing better performance of the block copolymer system versus the donor/acceptor simple blend system. In addition, dye sensitized polymer and organic/inorganic hybrid nanostructure solar cells were also investigated as dyes absorb more Sunlight Photon and have more available energy levels and gaps that can better match the solar spectrum than traditional solar cells.
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frontier orbital and morphology engineering of conjugated polymers and block copolymers for potential high efficiency photovoltaics
Solar Energy Materials and Solar Cells, 2012Co-Authors: Cheng Zhang, Thuong Nguyen, Tanya David, Rui Li, Jaleesa BrooksAbstract:Abstract The photoelectric power conversion efficiencies of currently reported organic/polymeric photovoltaic materials are still relatively low (typically less than 9% under AM 1.5 and one Sun intensity), and the three major losses are still severe, i.e., the ‘Photon loss’ due to mismatch of materials energy gaps versus the Sunlight Photon energies, the ‘exciton loss’ and the ‘carrier loss’ due to poor solid state morphologies of existing polymeric donor/acceptor binary systems. Therefore, both molecular frontier orbitals (HOMOs, LUMOs) and phase morphologies of the photovoltaic polymers need to be optimized to further enhance the efficiency. In this presentation, our recent efforts on frontier orbital and energy gap engineering and terminal functionalizations of conjugated polymer blocks, and the donor-bridge-acceptor type block copolymer approaches will be reviewed. For instance, an earlier developed (DBAB)n block copolymer system (where D represents a conjugated donor block, A represents a conjugated acceptor block, and B represents a non-conjugated bridge unit) exhibited much better photovoltaic properties compared to the corresponding simple D/A blend system. Recently, a new DBA conjugated block copolymer system based on mono-functionalized monomers has also been synthesized. Additionally, a series of terminal functional and sulfone-containing conjugated polymers with evolving frontier orbital energy levels and gaps have recently been designed, synthesized, and studied. The HOMO/LUMO energy gaps of these new polymers were in a range of 1.5–2.6 eV, which are very attractive for solar energy applications. The terminal functional groups (aldehyde or phosphonate) make these polymer blocks potentially ideal candidates for the development of donor/acceptor block copolymer supra-molecular nanostructures for a variety of optoelectronic applications.
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Polymer frontier orbital and morphology engineering for nanoPhotonics
Nanophotonics and Macrophotonics for Space Environments VI, 2012Co-Authors: Sam-shajing Sun, Thuong Nguyen, Jaleesa Brooks, Amanda Harding, Eumee Song, Tanya David, Cheng ZhangAbstract:Polymer thin film based optoelectronic devices including solar cells appear attractive for space applications where lightweight, large size, low cost, and flexible shape are desirable. The photoelectric power conversion efficiencies of currently reported polymer solar cells are still relatively low (typically less than % under AM 1.5 and one Sun intensity) due to several losses, i.e., the 'Photon loss' due to mismatch of materials energy gaps versus the Sunlight Photon energies, the 'exciton loss' and the 'carrier loss' due to poor solid state morphologies of existing polymeric donor/acceptor binary systems. Therefore, both molecular frontier orbitals (HOMOs, LUMOs) and phase morphologies need to be optimized to further enhance the efficiency. In this presentation, our recent efforts on frontier orbital and morphology engineering of conjugated polymer blocks and corresponding block copolymers will be reviewed. The HOMO/LUMO energy gaps of the new polymers were in a range of 1.5-2.0 eV which are attractive for solar cell applications. The terminal functional groups of donor and acceptor type conjugated blocks make them potentially ideal candidates for the development of donor/acceptor block copolymer supramolecular nanostructures for a variety of high efficiency optoelectronic applications. Dye sensitized triple system appear attractive for high efficiency optoelectronics due to reduction of charge recombination.
Cheng Zhang - One of the best experts on this subject based on the ideXlab platform.
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frontier orbital and morphology engineering of conjugated polymers and block copolymers for potential high efficiency photovoltaics
Solar Energy Materials and Solar Cells, 2012Co-Authors: Cheng Zhang, Thuong Nguyen, Tanya David, Rui Li, Jaleesa BrooksAbstract:Abstract The photoelectric power conversion efficiencies of currently reported organic/polymeric photovoltaic materials are still relatively low (typically less than 9% under AM 1.5 and one Sun intensity), and the three major losses are still severe, i.e., the ‘Photon loss’ due to mismatch of materials energy gaps versus the Sunlight Photon energies, the ‘exciton loss’ and the ‘carrier loss’ due to poor solid state morphologies of existing polymeric donor/acceptor binary systems. Therefore, both molecular frontier orbitals (HOMOs, LUMOs) and phase morphologies of the photovoltaic polymers need to be optimized to further enhance the efficiency. In this presentation, our recent efforts on frontier orbital and energy gap engineering and terminal functionalizations of conjugated polymer blocks, and the donor-bridge-acceptor type block copolymer approaches will be reviewed. For instance, an earlier developed (DBAB)n block copolymer system (where D represents a conjugated donor block, A represents a conjugated acceptor block, and B represents a non-conjugated bridge unit) exhibited much better photovoltaic properties compared to the corresponding simple D/A blend system. Recently, a new DBA conjugated block copolymer system based on mono-functionalized monomers has also been synthesized. Additionally, a series of terminal functional and sulfone-containing conjugated polymers with evolving frontier orbital energy levels and gaps have recently been designed, synthesized, and studied. The HOMO/LUMO energy gaps of these new polymers were in a range of 1.5–2.6 eV, which are very attractive for solar energy applications. The terminal functional groups (aldehyde or phosphonate) make these polymer blocks potentially ideal candidates for the development of donor/acceptor block copolymer supra-molecular nanostructures for a variety of optoelectronic applications.
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Polymer frontier orbital and morphology engineering for nanoPhotonics
Nanophotonics and Macrophotonics for Space Environments VI, 2012Co-Authors: Sam-shajing Sun, Thuong Nguyen, Jaleesa Brooks, Amanda Harding, Eumee Song, Tanya David, Cheng ZhangAbstract:Polymer thin film based optoelectronic devices including solar cells appear attractive for space applications where lightweight, large size, low cost, and flexible shape are desirable. The photoelectric power conversion efficiencies of currently reported polymer solar cells are still relatively low (typically less than % under AM 1.5 and one Sun intensity) due to several losses, i.e., the 'Photon loss' due to mismatch of materials energy gaps versus the Sunlight Photon energies, the 'exciton loss' and the 'carrier loss' due to poor solid state morphologies of existing polymeric donor/acceptor binary systems. Therefore, both molecular frontier orbitals (HOMOs, LUMOs) and phase morphologies need to be optimized to further enhance the efficiency. In this presentation, our recent efforts on frontier orbital and morphology engineering of conjugated polymer blocks and corresponding block copolymers will be reviewed. The HOMO/LUMO energy gaps of the new polymers were in a range of 1.5-2.0 eV which are attractive for solar cell applications. The terminal functional groups of donor and acceptor type conjugated blocks make them potentially ideal candidates for the development of donor/acceptor block copolymer supramolecular nanostructures for a variety of high efficiency optoelectronic applications. Dye sensitized triple system appear attractive for high efficiency optoelectronics due to reduction of charge recombination.
Thuong Nguyen - One of the best experts on this subject based on the ideXlab platform.
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Novel Organic and Polymeric Materials for Solar Energy Conversions
Energy Procedia, 2020Co-Authors: Jaleesa Brooks, Thuong Nguyen, Amanda Harding, Dan Wang, Tanya DavidAbstract:Abstract Organic or ‘plastic’ solar cells are attractive for solar photoelectric energy conversion applications where low cost (such as large area), lightweight, and flexible shape are desired. The photoelectric power conversion efficiencies of currently reported organic/polymeric photovoltaic materials are still relatively low (typically less than 10% under AM 1.5 and one Sun intensity), and the three major losses are still severe, i.e., the ‘Photon loss’ due to mismatch of materials energy gaps versus the Sunlight Photon energies, the ‘exciton loss’ and the ‘carrier loss’ due to poor solid state morphologies of existing polymeric donor/acceptor binary systems. Therefore, both molecular frontier orbitals (HOMOs, LUMOs) and phase morphologies need to be engineered to further enhance the efficiency. In this paper, our recent efforts on frontier orbital and energy gap engineering and terminal functionalizations of conjugated polymer blocks, and a donor-bridge-acceptor type block copolymer approach will be reviewed. For instance, a new donor-bridge-acceptor or DBA type conjugated block copolymer system has been successfully synthesized, characterized, and solar cells based on the new materials has been preliminarily tested revealing better performance of the block copolymer system versus the donor/acceptor simple blend system. In addition, dye sensitized polymer and organic/inorganic hybrid nanostructure solar cells were also investigated as dyes absorb more Sunlight Photon and have more available energy levels and gaps that can better match the solar spectrum than traditional solar cells.
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frontier orbital and morphology engineering of conjugated polymers and block copolymers for potential high efficiency photovoltaics
Solar Energy Materials and Solar Cells, 2012Co-Authors: Cheng Zhang, Thuong Nguyen, Tanya David, Rui Li, Jaleesa BrooksAbstract:Abstract The photoelectric power conversion efficiencies of currently reported organic/polymeric photovoltaic materials are still relatively low (typically less than 9% under AM 1.5 and one Sun intensity), and the three major losses are still severe, i.e., the ‘Photon loss’ due to mismatch of materials energy gaps versus the Sunlight Photon energies, the ‘exciton loss’ and the ‘carrier loss’ due to poor solid state morphologies of existing polymeric donor/acceptor binary systems. Therefore, both molecular frontier orbitals (HOMOs, LUMOs) and phase morphologies of the photovoltaic polymers need to be optimized to further enhance the efficiency. In this presentation, our recent efforts on frontier orbital and energy gap engineering and terminal functionalizations of conjugated polymer blocks, and the donor-bridge-acceptor type block copolymer approaches will be reviewed. For instance, an earlier developed (DBAB)n block copolymer system (where D represents a conjugated donor block, A represents a conjugated acceptor block, and B represents a non-conjugated bridge unit) exhibited much better photovoltaic properties compared to the corresponding simple D/A blend system. Recently, a new DBA conjugated block copolymer system based on mono-functionalized monomers has also been synthesized. Additionally, a series of terminal functional and sulfone-containing conjugated polymers with evolving frontier orbital energy levels and gaps have recently been designed, synthesized, and studied. The HOMO/LUMO energy gaps of these new polymers were in a range of 1.5–2.6 eV, which are very attractive for solar energy applications. The terminal functional groups (aldehyde or phosphonate) make these polymer blocks potentially ideal candidates for the development of donor/acceptor block copolymer supra-molecular nanostructures for a variety of optoelectronic applications.
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Polymer frontier orbital and morphology engineering for nanoPhotonics
Nanophotonics and Macrophotonics for Space Environments VI, 2012Co-Authors: Sam-shajing Sun, Thuong Nguyen, Jaleesa Brooks, Amanda Harding, Eumee Song, Tanya David, Cheng ZhangAbstract:Polymer thin film based optoelectronic devices including solar cells appear attractive for space applications where lightweight, large size, low cost, and flexible shape are desirable. The photoelectric power conversion efficiencies of currently reported polymer solar cells are still relatively low (typically less than % under AM 1.5 and one Sun intensity) due to several losses, i.e., the 'Photon loss' due to mismatch of materials energy gaps versus the Sunlight Photon energies, the 'exciton loss' and the 'carrier loss' due to poor solid state morphologies of existing polymeric donor/acceptor binary systems. Therefore, both molecular frontier orbitals (HOMOs, LUMOs) and phase morphologies need to be optimized to further enhance the efficiency. In this presentation, our recent efforts on frontier orbital and morphology engineering of conjugated polymer blocks and corresponding block copolymers will be reviewed. The HOMO/LUMO energy gaps of the new polymers were in a range of 1.5-2.0 eV which are attractive for solar cell applications. The terminal functional groups of donor and acceptor type conjugated blocks make them potentially ideal candidates for the development of donor/acceptor block copolymer supramolecular nanostructures for a variety of high efficiency optoelectronic applications. Dye sensitized triple system appear attractive for high efficiency optoelectronics due to reduction of charge recombination.
Tanya David - One of the best experts on this subject based on the ideXlab platform.
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Novel Organic and Polymeric Materials for Solar Energy Conversions
Energy Procedia, 2020Co-Authors: Jaleesa Brooks, Thuong Nguyen, Amanda Harding, Dan Wang, Tanya DavidAbstract:Abstract Organic or ‘plastic’ solar cells are attractive for solar photoelectric energy conversion applications where low cost (such as large area), lightweight, and flexible shape are desired. The photoelectric power conversion efficiencies of currently reported organic/polymeric photovoltaic materials are still relatively low (typically less than 10% under AM 1.5 and one Sun intensity), and the three major losses are still severe, i.e., the ‘Photon loss’ due to mismatch of materials energy gaps versus the Sunlight Photon energies, the ‘exciton loss’ and the ‘carrier loss’ due to poor solid state morphologies of existing polymeric donor/acceptor binary systems. Therefore, both molecular frontier orbitals (HOMOs, LUMOs) and phase morphologies need to be engineered to further enhance the efficiency. In this paper, our recent efforts on frontier orbital and energy gap engineering and terminal functionalizations of conjugated polymer blocks, and a donor-bridge-acceptor type block copolymer approach will be reviewed. For instance, a new donor-bridge-acceptor or DBA type conjugated block copolymer system has been successfully synthesized, characterized, and solar cells based on the new materials has been preliminarily tested revealing better performance of the block copolymer system versus the donor/acceptor simple blend system. In addition, dye sensitized polymer and organic/inorganic hybrid nanostructure solar cells were also investigated as dyes absorb more Sunlight Photon and have more available energy levels and gaps that can better match the solar spectrum than traditional solar cells.
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frontier orbital and morphology engineering of conjugated polymers and block copolymers for potential high efficiency photovoltaics
Solar Energy Materials and Solar Cells, 2012Co-Authors: Cheng Zhang, Thuong Nguyen, Tanya David, Rui Li, Jaleesa BrooksAbstract:Abstract The photoelectric power conversion efficiencies of currently reported organic/polymeric photovoltaic materials are still relatively low (typically less than 9% under AM 1.5 and one Sun intensity), and the three major losses are still severe, i.e., the ‘Photon loss’ due to mismatch of materials energy gaps versus the Sunlight Photon energies, the ‘exciton loss’ and the ‘carrier loss’ due to poor solid state morphologies of existing polymeric donor/acceptor binary systems. Therefore, both molecular frontier orbitals (HOMOs, LUMOs) and phase morphologies of the photovoltaic polymers need to be optimized to further enhance the efficiency. In this presentation, our recent efforts on frontier orbital and energy gap engineering and terminal functionalizations of conjugated polymer blocks, and the donor-bridge-acceptor type block copolymer approaches will be reviewed. For instance, an earlier developed (DBAB)n block copolymer system (where D represents a conjugated donor block, A represents a conjugated acceptor block, and B represents a non-conjugated bridge unit) exhibited much better photovoltaic properties compared to the corresponding simple D/A blend system. Recently, a new DBA conjugated block copolymer system based on mono-functionalized monomers has also been synthesized. Additionally, a series of terminal functional and sulfone-containing conjugated polymers with evolving frontier orbital energy levels and gaps have recently been designed, synthesized, and studied. The HOMO/LUMO energy gaps of these new polymers were in a range of 1.5–2.6 eV, which are very attractive for solar energy applications. The terminal functional groups (aldehyde or phosphonate) make these polymer blocks potentially ideal candidates for the development of donor/acceptor block copolymer supra-molecular nanostructures for a variety of optoelectronic applications.
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Polymer frontier orbital and morphology engineering for nanoPhotonics
Nanophotonics and Macrophotonics for Space Environments VI, 2012Co-Authors: Sam-shajing Sun, Thuong Nguyen, Jaleesa Brooks, Amanda Harding, Eumee Song, Tanya David, Cheng ZhangAbstract:Polymer thin film based optoelectronic devices including solar cells appear attractive for space applications where lightweight, large size, low cost, and flexible shape are desirable. The photoelectric power conversion efficiencies of currently reported polymer solar cells are still relatively low (typically less than % under AM 1.5 and one Sun intensity) due to several losses, i.e., the 'Photon loss' due to mismatch of materials energy gaps versus the Sunlight Photon energies, the 'exciton loss' and the 'carrier loss' due to poor solid state morphologies of existing polymeric donor/acceptor binary systems. Therefore, both molecular frontier orbitals (HOMOs, LUMOs) and phase morphologies need to be optimized to further enhance the efficiency. In this presentation, our recent efforts on frontier orbital and morphology engineering of conjugated polymer blocks and corresponding block copolymers will be reviewed. The HOMO/LUMO energy gaps of the new polymers were in a range of 1.5-2.0 eV which are attractive for solar cell applications. The terminal functional groups of donor and acceptor type conjugated blocks make them potentially ideal candidates for the development of donor/acceptor block copolymer supramolecular nanostructures for a variety of high efficiency optoelectronic applications. Dye sensitized triple system appear attractive for high efficiency optoelectronics due to reduction of charge recombination.
Rui Li - One of the best experts on this subject based on the ideXlab platform.
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frontier orbital and morphology engineering of conjugated polymers and block copolymers for potential high efficiency photovoltaics
Solar Energy Materials and Solar Cells, 2012Co-Authors: Cheng Zhang, Thuong Nguyen, Tanya David, Rui Li, Jaleesa BrooksAbstract:Abstract The photoelectric power conversion efficiencies of currently reported organic/polymeric photovoltaic materials are still relatively low (typically less than 9% under AM 1.5 and one Sun intensity), and the three major losses are still severe, i.e., the ‘Photon loss’ due to mismatch of materials energy gaps versus the Sunlight Photon energies, the ‘exciton loss’ and the ‘carrier loss’ due to poor solid state morphologies of existing polymeric donor/acceptor binary systems. Therefore, both molecular frontier orbitals (HOMOs, LUMOs) and phase morphologies of the photovoltaic polymers need to be optimized to further enhance the efficiency. In this presentation, our recent efforts on frontier orbital and energy gap engineering and terminal functionalizations of conjugated polymer blocks, and the donor-bridge-acceptor type block copolymer approaches will be reviewed. For instance, an earlier developed (DBAB)n block copolymer system (where D represents a conjugated donor block, A represents a conjugated acceptor block, and B represents a non-conjugated bridge unit) exhibited much better photovoltaic properties compared to the corresponding simple D/A blend system. Recently, a new DBA conjugated block copolymer system based on mono-functionalized monomers has also been synthesized. Additionally, a series of terminal functional and sulfone-containing conjugated polymers with evolving frontier orbital energy levels and gaps have recently been designed, synthesized, and studied. The HOMO/LUMO energy gaps of these new polymers were in a range of 1.5–2.6 eV, which are very attractive for solar energy applications. The terminal functional groups (aldehyde or phosphonate) make these polymer blocks potentially ideal candidates for the development of donor/acceptor block copolymer supra-molecular nanostructures for a variety of optoelectronic applications.
