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

TL;DR

This study demonstrates that adding 1% nitrobenzene to methylammonium-free inverted perovskite solar cells enhances efficiency, film quality, and durability against environmental degradation, leading to more reliable solar devices.

Contribution

It introduces nitrobenzene as an additive that improves both performance and stability of methylammonium-free perovskite solar cells, a novel approach for enhancing device reliability.

Findings

Increased power conversion efficiency due to defect passivation.

Smoother film formation with narrower efficiency distribution.

Prolonged device lifetime and improved degradation resistance.

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. Addition of nitrobenzene increased PCE due to defect passivation and provides smoother films resulting in PVSCs with narrower PCE distribution. Moreover, the nitrobenzene additive methylammonium-free hybrid PVSCs exhibit prolonged lifetime compare to additive free PVSCs due to enhanced air and moisture degradation resistance.