Nitrobenzene as Additive to Improve Reproducibility and Degradation Resistance of Highly Efficient Methylammonium-Free Inverted Perovskite Solar Cells

Apostolos Ioakeimidis; Stelios A Choulis

doi:10.3390/ma13153289

Nitrobenzene as Additive to Improve Reproducibility and Degradation Resistance of Highly Efficient Methylammonium-Free Inverted Perovskite Solar Cells

Materials (Basel). 2020 Jul 23;13(15):3289. doi: 10.3390/ma13153289.

Authors

Apostolos Ioakeimidis¹, Stelios A Choulis¹

Affiliation

¹ Molecular Electronics and Photonics Research Unit, Department of Mechanical Engineering and Materials Science and Engineering, Cyprus University of Technology, 45 Kitiou Kyprianou Street, Limassol 3603, Cyprus.

Abstract

We show that the addition of 1% (v/v) nitrobenzene within the perovskite formulation can be used as a method to improve the power conversion efficiency and reliability performance of methylammonium-free (CsFA) inverted perovskite solar cells. The addition of nitrobenzene increased power conversion efficiency (PCE) owing to defect passivation and provided smoother films, resulting in hybrid perovskite solar cells (PVSCs) with a narrower PCE distribution. Moreover, the nitrobenzene additive methylammonium-free hybrid PVSCs exhibit a prolonged lifetime compared with additive-free PVSCs owing to enhanced air and moisture degradation resistance.

Keywords: additives; air stability; humidity lifetime; methylammonium-free; nitrobenzene; perovskite solar cells; reliability.

Grants and funding

647311/H2020 European Research Council