Yazar "Choi, Fatma Pinar Gokdemir" seçeneğine göre listele

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    Öğe
    A novel interface layer for inverted perovskite solar cells fabricated in ambient air under high humidity conditions
    (Pergamon-Elsevier Science Ltd, 2020) Choi, Fatma Pinar Gokdemir; Alishah, Hamed Moeini; Bozar, Sinem; Doyranli, Ceylan; Koyuncu, Sermet; San, Nevim; Kahveci, Cihangir
    A novel benzotriazol based small molecule (2-hexyl-4,7-bis(5'-hexyl-2,2'-bithien-5-yl)-2H-1,2,3-benzotriazole) BTBT was synthesized by Suzuki coupling reaction and was successfully employed in planar inverted perovskite solar cells with ITO/BTBT/PEDOT:PSS/CH3NH3PbI3-xCl(x)/PCBM/Al configuration. Fabrication processes, including the spin coating of the perovskite layer, were performed in ambient air, under high humidity conditions (>60%). BTBT/PEDOT:PSS bilayer notably improved the power conversion efficiencies (PCE) from 9.65% to 11.6%, which corresponds to an increase of 20%.
  • [ X ]
    Öğe
    Triphenylamine-based organic small-molecule interlayer materials for inverted perovskite solar cells
    (Elsevier, 2022) Doyranli, Ceylan; Choi, Fatma Pinar Gokdemir; Alishah, Hamed Moeini; Koyuncu, Sermet; Gunes, Serap; San, Nevim
    In this report, two novel donor-acceptor-donor type triphenylamine-quinoxaline-based (QC-TPA and QC-TPAOMe) small organic molecules have been synthesized by the Suzuki coupling reaction as hole transport materials (HTMs) and successfully utilized in the NiOx/perovskite interface. All device fabrication steps with ITO/NiOx/QC-TPA or QC-TPAOMe/CH3NH3PbI3/PCBM/BCP/Ag configurations were performed in ambient air over 55% relative humidity, except for thermal evaporation of metal contacts. Modifications of the NiOx/ perovskite interface with QC-TPA and QC-TPAOMe molecules can improve FF and JSC by enhancing hole extraction and reducing energy losses. Consequently, the power conversion efficiency (PCE) boosted from 10.03% to 14.46% and 13.21% with surface modifications of NiOx with QC-TPA and QC-TPAOMe, respectively.