Organic photovoltaic cells with onion-like carbon thin films as hole collection layers

Carbon Nano‐Onion and Zinc Oxide Composites as an Electron Transport Layer in Inverted Organic Solar Cells

“…The work function of ZnO and CNO/ZnO (1 : 4) were obtained at 4.89 eV and 4.38 eV, respectively. For comparison, the ionization potential of pristine onion‐like carbons was determined as 5.23 eV and the value of optical bandgap for thin films containing onion‐like carbons was deduced as 2.02 eV …”

“…For comparison, the ionization potential of pristine onion-like carbons was determined as 5.23 eV and the value of optical bandgap for thin films containing onion-like carbons was deduced as 2.02 eV. [65] The values of I SC for all samples are between 7 and 9 mA cm À 2 . The FF values for the ZnO and CNO/ZnO (1 : 4) devices are 0.31 and 0.41, respectively.…”

Carbon nanoonion-ferrocene conjugates as acceptors in organic photovoltaic devices

“…The photocurrent was observed to increase by a factor of 5.5 over that of solar devices without CNOs. 31 The highest power conversion efficiency (PCE) was up to 6.9 Â 10 À2 %. 31 Analogously, a device based on a crystalline perovskite lm with oxidized CNOs incorporated into the hole transporting layer together with poly(3,4ethylenedioxythiophene):polystyrene sulphonate (PEDOT:PSS), resulted in a signicant enhancement of the PCE from 11.07 to 15.26%.…”

“…31 The highest power conversion efficiency (PCE) was up to 6.9 Â 10 À2 %. 31 Analogously, a device based on a crystalline perovskite lm with oxidized CNOs incorporated into the hole transporting layer together with poly(3,4ethylenedioxythiophene):polystyrene sulphonate (PEDOT:PSS), resulted in a signicant enhancement of the PCE from 11.07 to 15.26%. 32 Additionally, larger CNO structures (30 nm in diameter) were used in dye-sensitized solar cells as a counter electrode, and the PCE was comparable to that obtained with the commonly used platinum one.…”

“…Since then, to the best of our knowledge, no reports on the use of CNOs as acceptor in the active layer of OPVs have been demonstrated. 31,32 Notably, these CNs were used as hole collection layers in zinc-phthalocyanine-based OPV solar cells. The photocurrent was observed to increase by a factor of 5.5 over that of solar devices without CNOs.…”