Enhanced electron transport induced by a ferroelectric field in efficient halide perovskite solar cells

Zarenezhad, H ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1016/j.solmat.2019.110318
  3. Publisher: Elsevier B.V , 2020
  4. Abstract:
  5. Perovskite solar cells have been appearing as a superior photovoltaic device owing to their high photovoltaic performance and low cost of fabrication. The formation of a compact and uniform perovskite layer with large crystal size is a significant factor to get the best device performance. In this work, polyvinylidene difluoride (PVDF) was used as a ferroelectric polymer additive to fabricate high-performance mesoporous CH3NH3PbI3-xClx mixed-halide perovskite solar cells in a sequential deposition method. Power conversion efficiency has been enhanced from 10.4 to 16.51% in an ambient atmosphere in the presence of an optimized amount of PVDF assuring continuous and smooth layers with large grain size. Besides morphological improvements, this progress in the photovoltaic performance is attributed to the dipole field exerted by PVDF that leads to enhanced charge separation. Further improvements in efficiency (18.60%) have been achieved by directing the dipoles under an external field. © 2019 Elsevier B.V
  6. Keywords:
  7. Ferroelectric ; Halide perovskite solar cells ; Morphology ; Polymer additive ; PVDF ; Additives ; Efficiency ; Electron transport properties ; Ferroelectric materials ; Ferroelectricity ; Grain size and shape ; Morphology ; Perovskite ; Polymer solar cells ; Solar power generation ; Ferroelectric polymers ; Photovoltaic devices ; Photovoltaic performance ; Polymer additive ; Polyvinylidene difluoride ; Power conversion efficiencies ; Sequential deposition ; Perovskite solar cells
  8. Source: Solar Energy Materials and Solar Cells ; Volume 206 , 2020
  9. URL: https://www.sciencedirect.com/science/article/pii/S0927024819306464