title: Pure white-light emitting ultrasmall organic-inorganic hybrid perovskite nanoclusters.
abstract: Organic-inorganic hybrid perovskites, direct band-gap semiconductors, have shown tremendous promise for optoelectronic device fabrication. We report the first colloidal synthetic approach to prepare ultrasmall (∼1.5 nm diameter), white-light emitting, organic-inorganic hybrid perovskite nanoclusters. The nearly pure white-light emitting ultrasmall nanoclusters were obtained by selectively manipulating the surface chemistry (passivating ligands and surface trap-states) and controlled substitution of halide ions. The nanoclusters displayed a combination of band-edge and broadband photoluminescence properties, covering a major part of the visible region of the solar spectrum with unprecedentedly large quantum yields of ∼12% and photoluminescence lifetime of ∼20 ns. The intrinsic white-light emission of perovskite nanoclusters makes them ideal and low cost hybrid nanomaterials for solid-state lighting applications.
authors.affiliation: Department of Chemistry and Chemical Biology, Integrated Nanosystems Development Institute, Indiana University-Purdue University Indianapolis, 402 N. Blackford Indianapolis, Indiana 46202, USA. rsardar@iupui.edu.
authors.forename: Meghan B
authors.initials: MB
authors.lastname: Teunis
authors.affiliation: Department of Chemistry and Chemical Biology, Integrated Nanosystems Development Institute, Indiana University-Purdue University Indianapolis, 402 N. Blackford Indianapolis, Indiana 46202, USA. rsardar@iupui.edu.
authors.forename: Katie N
authors.initials: KN
authors.lastname: Lawrence
authors.affiliation: Department of Chemistry, Michigan State University, 578 S. Shaw Lane East Lansing, Michigan 48824, USA.
authors.forename: Poulami
authors.initials: P
authors.lastname: Dutta
authors.affiliation: Department of Chemistry and Chemical Biology, Integrated Nanosystems Development Institute, Indiana University-Purdue University Indianapolis, 402 N. Blackford Indianapolis, Indiana 46202, USA. rsardar@iupui.edu.
authors.forename: Amanda P
authors.initials: AP
authors.lastname: Siegel
authors.affiliation: Department of Chemistry and Chemical Biology, Integrated Nanosystems Development Institute, Indiana University-Purdue University Indianapolis, 402 N. Blackford Indianapolis, Indiana 46202, USA. rsardar@iupui.edu.
authors.forename: Rajesh
authors.initials: R
authors.lastname: Sardar