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 languageEnglish (US)
Pages (from-to)189-193
Number of pages5
JournalMRS Communications
Volume9
Issue number1
DOIs
StatePublished - Mar 1 2019

ASJC Scopus subject areas

  • Materials Science(all)

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