Effect of excessive Pb on the stability and performance of Pb-halide perovskite solar cells against photo-induced degradation

Perovskite solar cells have evolved significantly since their inception. However, stability is still a major concern. We fabricated devices using a glass/ITO/PEDOT:PSS/MAPbI3/PCBM/Ag device configuration. Devices fabricated using the Pb-acetate precursors showed an efficiency of 13%. This work repor...

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Bibliographic Details
Published inMRS communications Vol. 9; no. 1; pp. 189 - 193
Main Authors Yerramilli, Aditya S., Chen, Yuanqing, Alford, T. L.
Format Journal Article
LanguageEnglish
Published New York, USA Cambridge University Press 01.03.2019
Springer International Publishing
Subjects
Annealing
Biomaterials
Characterization and Evaluation of Materials
Devices
Efficiency
Electrodes
Glass substrates
Lead content
Materials Engineering
Materials Science
Nanotechnology
Perovskites
Photodegradation
Photovoltaic cells
Polymer Sciences
Precursors
Research Letter
Research Letters
Solar cells
Spectrum analysis
Stability
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Summary:Perovskite solar cells have evolved significantly since their inception. However, stability is still a major concern. We fabricated devices using a glass/ITO/PEDOT:PSS/MAPbI3/PCBM/Ag device configuration. Devices fabricated using the Pb-acetate precursors showed an efficiency of 13%. This work reports the effect of adding excess lead to the precursor and its impact on the light-induced degradation of efficiency. It is found that 5% excess lead is best for devices regarding the performance and stability and devices retained greater than 50% of the initial efficiency after 2 h of prolonged irradiation. We attribute this phenomenon to the formation of PbI2 which induces passivation in the grain-boundaries.
ISSN:2159-6859
2159-6867
DOI:10.1557/mrc.2018.231