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Polymer Amplification to Improve Performance and Stability Towards Semi-Transparent Perovskite Solar Cells Fabrication

preprint
submitted on 28.08.2019, 09:10 and posted on 29.08.2019, 18:16 by Hafez Nikbakht, Ahmed Esmail Shalan, Manuel Salado, Abbas Assadi, Parviz Boroojerdian, Samrana Kazim, Shahzada Ahmad

The performance of methylammonium lead triiodide (CH3NH3PbI3) based solar cells depends on its crystallization and controlled microstructure. In spite of its high performance, long-term stability is a paramount factor towards its large area fabrication and potential industrialization. Herein, we have employed poly(vinylidene fluoride−trifluoro ethylene) P(VDF-TrFE) as an additive into a low concentration based perovskite precursor solutions to control the crystallinity and microstructure. Perovskite layers of lower thickness can be derived from low precursor concentration, however it often suffers from severe voids and roughness. Introducing judicious quantities of P(VDF-TrFE) can improve the surface coverage, smoothness as well as reduces the grain boundaries in the perovskite. An array of characterization techniques were utilized to probe the structural, microstructural and spectroscopic properties. Impedance spectra suggests, the P(VDF-TrFE) can improve the carrier lifetimes and reduce the charge transfer resistance, which in turn allows to improve photovoltaic performance. For an optimized concentration of P(VDF-TrFE), the fabricated semi-transparent solar cells yielded power conversion efficiency in excess of 10%, which supersede pristine devices along with improved stability. The device architect and the fabrication technique provide an effective route to fabricate cost effective and visible-light-semi-transparent perovskite solar cells.

Funding

EU H2020 Excellence Grant- ERC

History

Email Address of Submitting Author

shahzada.ahmad@bcmaterials.net

Institution

BCMaterials-Basque center for materials, applications & nanostructures

Country

Spain

ORCID For Submitting Author

0000-0002-1218-2556

Declaration of Conflict of Interest

No conflict of interest

Version Notes

Pre accepted / submitted version

Exports