Investigating the reason for high FF from ternary organic solar cells

Organic solar cells(OSCs)have attracted huge attention because of their unique merits[1−3].In last few years,thanks to the design of new materials and device engineering,the power conversion efficiencies(PCEs)of OSCs have surpassed 18%[4−8].The PM6:Y6 cells are efficient binary cells,offering high PCEs over 16%[9−11].The high performance originates from the efficient free charge generation and the ground state dipole field at the donor-acceptor interface that promotes the exciton dissociation[12].

Two-step preparation of carbon nanotubes/Ru02/polyindole ternary nanocomposites and their application as high-performance supercapacitors

A ternary single-walled carbon nanotubes/RuO2/polyindole(SWCNT/RuO2/PIn)nanocomposite was fabricated by the oxidation polymerization of indole on the prefabricated SWCNT/RuO2 binary nanocomposites.The nanocomposite was measured by FTIR,XRD,SEM,TEM,EDS and XPS,together with the electrochemical technique.The electrochemical results demonstrated that the symmetric supercapacitor used SWCNT/RuO2/PIn as electrodes presented 95%retention rate after 10000 cycles,superior capacitive performance of1203 F·g^-1 at1 A·g^-1,and high energy density of 33 w h·kg^-1 at 5000 W·kg^-1.The high capacitance performance of SWCNT/RuO2/PIn nanocomposite was mainly ascribed to the beneficial cooperation effect among components.This indicated that the SWCNT/RuO2/PIn nanocomposite would be a good candidate for high-performance supercapacitors.