%0 Journal Article %1 alsari2018degradation %A Alsari, Mejd %A Pearson, Andrew J. %A Wang, Jacob Tse-Wei %A Wang, Zhiping %A Montisci, Augusto %A Greenham, Neil C. %A Snaith, Henry J. %A Lilliu, Samuele %A Friend, Richard H. %D 2018 %J Scientific Reports %K Degradation Perovskite %N 1 %P 5977-- %R 10.1038/s41598-018-24436-6 %T Degradation Kinetics of Inverted Perovskite Solar Cells %U https://doi.org/10.1038/s41598-018-24436-6 %V 8 %X 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.

@article{alsari2018degradation, 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.}, added-at = {2018-04-20T14:33:38.000+0200}, author = {Alsari, Mejd and Pearson, Andrew J. and Wang, Jacob Tse-Wei and Wang, Zhiping and Montisci, Augusto and Greenham, Neil C. and Snaith, Henry J. and Lilliu, Samuele and Friend, Richard H.}, biburl = {https://www.bibsonomy.org/bibtex/2ed65c2436b8de837ecb73b644f265d64/martinstreiter}, doi = {10.1038/s41598-018-24436-6}, interhash = {f4902a536f0fe790616b7d5e0e884f9f}, intrahash = {ed65c2436b8de837ecb73b644f265d64}, issn = {20452322}, journal = {Scientific Reports}, keywords = {Degradation Perovskite}, number = 1, pages = {5977--}, refid = {Alsari2018}, timestamp = {2018-04-20T14:33:38.000+0200}, title = {Degradation Kinetics of Inverted Perovskite Solar Cells}, url = {https://doi.org/10.1038/s41598-018-24436-6}, volume = 8, year = 2018 }