With performance improvements,organic photovoltaics(OPVs)are an increasingly competitive technology for renewable energy.However,most high-performance OPVs are small-area devices processed from toxic halogenated solve...With performance improvements,organic photovoltaics(OPVs)are an increasingly competitive technology for renewable energy.However,most high-performance OPVs are small-area devices processed from toxic halogenated solvents via spin-coating,posing a challenge for mass production.We study a low-cost polymer donor(PTQ10)and a nonfullerene acceptor(DTY6)in a halogen-free solvent using industrially relevant blade coating.The non-inverted architecture performed best,achieving 12%efficiency,with the blade-coating deposition surpassing spin-coating.Active layers processed from the two coating techniques exhibited similar exciton quenching,likely due to the same measured nanodomain size and purity.However,blade-coated devices exhibited a higher charge carrier lifetime correlated with increased acceptor pi-stacking despite decreased donor pi-stacking.This suggests that optimizing crystallinity in bladecoated devices could result in even higher performance.Additionally,high performance in upscaled blade-coated devices(1 cm2)processed in air with a green solvent demonstrated the industrial potential of this system.展开更多
A series of phosphorus-modified PITQ-13 catalysts was prepared by wet impregnation of NH4H2PO4 solution into an HITQ-13 parent. The catalysts were characterized using XRD, N2 adsorption, MAS NMR and NH3-TPD. Their cat...A series of phosphorus-modified PITQ-13 catalysts was prepared by wet impregnation of NH4H2PO4 solution into an HITQ-13 parent. The catalysts were characterized using XRD, N2 adsorption, MAS NMR and NH3-TPD. Their catalytic performance in 1-butene catalytic cracking was evaluated in a fixed fluidized bed reactor. The results showed that the crystallinity, surface area and pore volume of P-modified PITQ-13 catalysts decreased with the increasing amounts of P. The number of weak acid sites increased, whereas that of strong acidity decreased. The selectivity to propylene in 1-butene cracking reactions increased because of the decrease in strong acidity. The yield of propylene achieved 41.6% over PITQ-13-2 catalyst with a P content of 1.0 wt%, which was 5.1% greater than that achieved over HITQ-13 catalyst.展开更多
基金the US National Science Foundation(NSF),Division of Materials Research,Electronic and Photonic Materials Program under grant#2247711support from the Bio Voltaico project n.A0613-2023-078175 of the POR FESR 2021/2027 Riposizionamento Competitivo RSI-Economia del Mare,Green Economy e Agrifood initiative,and Integrated Terrestrial And Non-Terrestrial Networks(ITANTN)project under the Research and innovation on future Telecommunications systems and networks,to make Italy more smart(RESTART)initiative of the PNRRsupported by the NSF Division of Physics Research Experience for Undergraduates under grant#2349426。
文摘With performance improvements,organic photovoltaics(OPVs)are an increasingly competitive technology for renewable energy.However,most high-performance OPVs are small-area devices processed from toxic halogenated solvents via spin-coating,posing a challenge for mass production.We study a low-cost polymer donor(PTQ10)and a nonfullerene acceptor(DTY6)in a halogen-free solvent using industrially relevant blade coating.The non-inverted architecture performed best,achieving 12%efficiency,with the blade-coating deposition surpassing spin-coating.Active layers processed from the two coating techniques exhibited similar exciton quenching,likely due to the same measured nanodomain size and purity.However,blade-coated devices exhibited a higher charge carrier lifetime correlated with increased acceptor pi-stacking despite decreased donor pi-stacking.This suggests that optimizing crystallinity in bladecoated devices could result in even higher performance.Additionally,high performance in upscaled blade-coated devices(1 cm2)processed in air with a green solvent demonstrated the industrial potential of this system.
基金supported by PetroChina Company Limited(12-09-01-01)the National Basic Research Program of China(973 Program,2012CB215001)
文摘A series of phosphorus-modified PITQ-13 catalysts was prepared by wet impregnation of NH4H2PO4 solution into an HITQ-13 parent. The catalysts were characterized using XRD, N2 adsorption, MAS NMR and NH3-TPD. Their catalytic performance in 1-butene catalytic cracking was evaluated in a fixed fluidized bed reactor. The results showed that the crystallinity, surface area and pore volume of P-modified PITQ-13 catalysts decreased with the increasing amounts of P. The number of weak acid sites increased, whereas that of strong acidity decreased. The selectivity to propylene in 1-butene cracking reactions increased because of the decrease in strong acidity. The yield of propylene achieved 41.6% over PITQ-13-2 catalyst with a P content of 1.0 wt%, which was 5.1% greater than that achieved over HITQ-13 catalyst.
