High efficiency perovskite quantum dot solar cells with charge separating heterostructure

Metal halide perovskite semiconductors possess outstanding characteristics for optoelectronic applications including but not limited to photovoltaics. Low-dimensional and nanostructured motifs impart added functionality which can be exploited further. Moreover, wider cation composition tunability and tunable surface ligand properties of colloidal quantum dot (QD) perovskites now enable unprecedented device architectures which differ from thin-film perovskites fabricated from solvated molecular precursors. Here, using layer-by-layer deposition of perovskite QDs, we demonstrate solar cells with abrupt compositional changes throughout the perovskite film. We utilize this ability to abruptly control composition to…

• UD
  U.S. Department of Defense
• UD
  U.S. Department of Energy

  Awards: AC36-08GO28308, -AC36-08GO28308, 08GO28308
• CF
  Center for Hybrid Organic Inorganic Semiconductors for Energy
• CS
  China Scholarship Council
• OO
  Office of Science

  Award: DE-AC36-08GO28308
• BE
  Basic Energy Sciences

  Awards: AC36-08GO28308, DE-AC36-08GO28308, 08GO28308, AC36-
• NR
  National Renewable Energy Laboratory

  Awards: AC36-08GO28308, DE-AC36-08GO28308