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

Aditya S. Yerramilli; Yuanqing Chen; Terry Alford

doi:10.1557/mrc.2018.231

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

Aditya S. Yerramilli, Yuanqing Chen, Terry Alford

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2 Scopus citations

Abstract

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 PbI ₂ which induces passivation in the grain-boundaries.

Original language	English (US)
Pages (from-to)	189-193
Number of pages	5
Journal	MRS Communications
Volume	9
Issue number	1
DOIs	https://doi.org/10.1557/mrc.2018.231
State	Published - Mar 1 2019

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Materials Science(all)

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10.1557/mrc.2018.231

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abstract = " 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 PbI 2 which induces passivation in the grain-boundaries. ",

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

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