articleJournal of the American Chemical SocietyFeb 7, 2016Closed access

A Bismuth-Halide Double Perovskite with Long Carrier Recombination Lifetime for Photovoltaic Applications

AHAdam H. SlavneyTHTe HuAMAaron M. LindenbergHIHemamala I. Karunadasa

Stanford University

PubMed
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Abstract

Despite the remarkable rise in efficiencies of solar cells containing the lead-halide perovskite absorbers RPbX3 (R = organic cation; X = Br(-) or I(-)), the toxicity of lead remains a concern for the large-scale implementation of this technology. This has spurred the search for lead-free materials with similar optoelectronic properties. Here, we use the double-perovskite structure to incorporate nontoxic Bi(3+) into the perovskite lattice in Cs2AgBiBr6 (1). The solid shows a long room-temperature fundamental photoluminescence (PL) lifetime of ca. 660 ns, which is very encouraging for photovoltaic applications. Comparison between single-crystal and powder PL decay curves of 1 suggests inherently high defect…

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Topics & keywords

Topics
Keywords
  • Halide
  • Photovoltaics
  • Perovskite (structure)
  • Chemistry
  • Photoluminescence
  • Band gap
  • Bismuth
  • Optoelectronics
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