Solar Energy, vol.209, pp.400-407, 2020 (SCI-Expanded)
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Benzotriazol based small molecule, Hole transport layer, Electron blocking layer, Planar perovskite solar cells, Inverted structure, Perovskite grain size, PROBE FORCE MICROSCOPY, PLANAR, EFFICIENT, PERFORMANCE, CHALLENGES, FILM
Yıldız Technical University Affiliated:
© 2020 International Solar Energy SocietyA 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-xClx/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%.