Enhanced Out-of-Plane Conductivity and Photovoltaic Performance in n = 1 Layered Perovskites through Organic Cation Design

James V. Passarelli, Daniel J. Fairfield, Nicholas A. Sather, Mark P. Hendricks, Hiroaki Sai, Charlotte L. Stern, Samuel I. Stupp

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

Layered perovskites with the formula (R-NH3)2PbI4 have excellent environmental stability but poor photovoltaic function due to the preferential orientation of the semiconducting layer parallel to the substrate and the typically insulating nature of the R-NH3 + cation. Here, we report a series of these n = 1 layered perovskites with the form (aromatic-O-linker-NH3)2PbI4 where the aromatic moiety is naphthalene, pyrene, or perylene and the linker is ethyl, propyl, or butyl. These materials achieve enhanced conductivity perpendicular to the inorganic layers due to better energy level matching between the inorganic layers and organic galleries. The enhanced conductivity and visible absorption of these materials led to a champion power conversion efficiency of 1.38%, which is the highest value reported for any n = 1 layered perovskite, and it is an order of magnitude higher efficiency than any other n = 1 layered perovskite oriented with layers parallel to the substrate. These findings demonstrate the importance of leveraging the electronic character of the organic cation to improve optoelectronic properties and thus the photovoltaic performance of these chemically stable low n layered perovskites.

Original languageEnglish
Pages (from-to)7313-7323
Number of pages11
JournalJournal of the American Chemical Society
Volume140
Issue number23
DOIs
Publication statusPublished - Jun 13 2018

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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