Enhanced performance of tin-based perovskite solar cells induced by an ammonium hypophosphite additive

Jiupeng Cao, Qidong Tai, Peng You, Guanqi Tang, Tianyue Wang, Naixiang Wang, Feng Yan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

50 Citations (Scopus)


As a promising lead-free perovskite candidate, tin-based halide perovskites such as FASnI3 have attracted extensive attention recently in photovoltaic applications. However, the relatively low efficiency and poor long-term stability of tin-based perovskite solar cells hinder their practical applications. Here, ammonium hypophosphite is introduced into the FASnI3 perovskite precursor to suppress the oxidation of Sn2+ and assist the growth of perovskite grains, leading to improved perovskite film quality and reduced defect density, and consequently, the device efficiency and open circuit voltage are substantially improved. More importantly, the solar cells exhibit pronounced enhancement of the long-term stability. This work provides a facile approach for improving the performance of tin-based perovskite solar cells by introducing ammonium hypophosphite as an antioxidant agent in the precursor solution.

Original languageEnglish
Pages (from-to)26580-26585
Number of pages6
JournalJournal of Materials Chemistry A
Issue number46
Publication statusPublished - 14 Dec 2019

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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