Moderately reduced graphene oxide via UV-ozone treatment as hole transport layer for high efficiency organic solar cells

Recent Advances in Hole-Transporting Layers for Organic Solar Cells

“…The application of UVO irradiation has shown excellent efficiency in reducing GO in large-scale OSCs manufacturing. Xia et al [ 228 ] and Rafique et al [ 229 ] exposed GO to UVO treatment, resulting in optimized performance in P3HT:PC 71 BM and PCDTBT:PC 71 BM blend systems. UVO oxidizes the surface of GO and removes CO 2 molecules, leaving a uniform, smoothed, and conductive film.…”

Density functional theory simulation of cobalt oxide aggregation and facile synthesis of a cobalt oxide, gold and multiwalled carbon nanotube based ternary composite for a high performance supercapattery

“…The main peak at 284.75 eV is attributed to the sp 2 C-C and the other two peaks are ascribed to the sp 3 C-C and the carbonyl C (C=O) at ∼285.83 eV and 288.88eV, respectively. [34][35][36][37][38] Curve fitting for Co corelevel spectrum shows the characteristic peaks of Co 2p3/2 at and Co 2p1/2 at 779.97 eV and 795.95 eV, with two shake-up satellite peaks, which represents the typical peak formation for Co3O4 phase. [39][40][41]…”

Organic solar cells: Current perspectives on graphene‐based materials for electrodes, electron acceptors and interfacial layers

“…Furthermore, the integration of rGO:GeQDs and PEDOT:PSS has been reported to improve the PCE from 1.6% for the pristine PEDOT:PSS‐based device to 2.4% for the PEDOT:PSS‐rGO:GeQDs, 136 hence paving the way for the application of rGO‐based composites as HTLs in OSCs. Furthermore, the rGO‐based devices managed to retain ~95 131 and ~92% 135 of their initial PCEs after exposure to ambient air for 250 and 240 hours, respectively, as compared to the PEDOT:PSS devices, which showed a rapid drop in PCE, demonstrating the superior stability of the graphene‐based devices.…”

“…A further step was made by Rafique et al, 131 Romero-Borja et al 132 and Fakharan et al, 133 who used rGO films as HTLs in OSCs, with the ITO/rGO/PTB7: [70]PCBM: solution-processed functionalized graphene (SPFG)/poly [(9,9-bis(3 0 -(N,N-dimethylamino)propyl)-2,7-fluorene)-al t-2,7-(9,9-dioctylfluorene)] (PFN)/Field's metal (FM), ITO/rGO/PCDTBT:PC 71 BM/Al, and ITO/rGO/P3HT: PCBM/Al configurations, respectively. The fabricated devices exhibited PCEs of 5.66%, 4.07% and 4.02%, respectively, which was an improvement relative to their GO-based counterparts, and comparable to the PEDOT:PSS-based devices.…”