# Degradation Kinetics of Inverted Perovskite Solar Cells

Source: [Degradation Kinetics of Inverted Perovskite Solar Cells](<https://www.sota2.com/research/paper/68fa371f1e209131ce8afa7a>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T22:12:37.878Z

Authors: Mejd Alsari, Andrew J. Pearson, Jacob Tse-Wei Wang, Zhiping Wang, Augusto Montisci, Neil C. Greenham, Henry J. Snaith, Samuele Lilliu, Richard H. Friend

Published: 2018-01-22T21:43:40.000Z

## Abstract

We explore the degradation behaviour under continuous illumination and direct oxygen exposure of inverted unencapsulated formamidinium(FA)0.83Cs0.17Pb(I0.8Br0.2)3, CH3NH3PbI3, and CH3NH3PbI3-xClx perovskite solar cells. We continuously test the devices in-situ and in-operando with current-voltage sweeps, transient photocurrent, and transient photovoltage measurements, and find that degradation in the CH3NH3PbI3-xClx solar cells due to oxygen exposure occurs over shorter timescales than FA0.83Cs0.17Pb(I0.8Br0.2)3 mixed-cation devices. We attribute these oxygen-induced losses in the power conversion efficiencies to the formation of electron traps within the perovskite photoactive layer. Our results highlight that the formamidinium-caesium mixed-cation perovskites are much less sensitive to oxygen-induced degradation than the methylammonium-based perovskite cells, and that further improvements in perovskite solar cell stability should focus on the mitigation of trap generation during ageing.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1801.09761>)

[PDF](<https://arxiv.org/pdf/1801.09761.pdf>)