Highly efficient mixed-halide mixed-cation perovskite solar cells based on rGO-TiO2 composite nanofibers. (15th December 2019)

• Record Type: Journal Article
• Authors: Patil, Jyoti V.; Mali, Sawanta S.; Patil, Akhilesh P.; Patil, Pramod S.; Hong, Chang Kook
• Is Part Of: Energy. Volume 189(2019)
• Publication Date: 2019-12-15
• Subjects: Perovskite solar cells -- Electron transporting materials -- Role of rGO in TiO2 nanofibers -- Large grain size -- High-efficiency; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2019.116396
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: In this investigation, the electrospun reduced graphene oxide-titanium oxide composite nanofibers as an electron transporting materials have been employed for the perovskite solar cells. The synthesized electron transporting materials have been used for the fabrication of mixed-cation lead mixed-halide (FAPbI3 )0.85 (MAPbBr3 )0.15 perovskite solar cells. The influence of reduced graphene oxide on titanium oxide nanofibers and their morphological and electronic properties have been investigated in detail. The optimized device having FTO/Bl-TiO2 /rGO4 –TiO2 /(FAPbI3 )0.85 (MAPbBr3 )0.15 / s piro-MeOTAD/Au configuration exhibited a η = 17.66% power conversion efficiency with an open circuit voltage of 1.070 V, short circuit current density of 22.16 mAcm −2 and fill factor of 0.754. This obtained efficiency is much higher than that of mesoporous-titanium oxide (14.39%), pristine-titanium oxide nanofibers (15.82%) and other reduced graphene oxide-titanium oxide composite nanofibers based electron transporting materials. Highlights: Role of electron transporting materials in perovskite solar cells. Influence of reduced graphene oxide on titanium oxide nanofibers by electrospinning. Solvent engineering processed mixed halide mixed cation perovskite. Larger grain size with reduced grain boundaries achieved. The 17.66% power conversion efficiency achieved perovskite solar cells.