title: Giant photoluminescence blinking of perovskite nanocrystals reveals single-trap control of luminescence.
abstract: Fluorescence super-resolution microscopy showed correlated fluctuations of photoluminescence intensity and spatial localization of individual perovskite (CH3NH3PbI3) nanocrystals of size ∼200 × 30 × 30 nm(3). The photoluminescence blinking amplitude caused by a single quencher was a hundred thousand times larger than that of a typical dye molecule at the same excitation power density. The quencher is proposed to be a chemical or structural defect that traps free charges leading to nonradiative recombination. These trapping sites can be activated and deactivated by light.
authors.affiliation: Chemical Physics, Lund University , Box 124, SE-22100, Lund, Sweden.
authors.forename: Yuxi
authors.initials: Y
authors.lastname: Tian
authors.forename: Aboma
authors.initials: A
authors.lastname: Merdasa
authors.forename: Maximilian
authors.initials: M
authors.lastname: Peter
authors.forename: Mohamed
authors.initials: M
authors.lastname: Abdellah
authors.forename: Kaibo
authors.initials: K
authors.lastname: Zheng
authors.forename: Carlito S
authors.initials: CS
authors.lastname: Ponseca
authors.forename: Tõnu
authors.initials: T
authors.lastname: Pullerits
authors.forename: Arkady
authors.initials: A
authors.lastname: Yartsev
authors.forename: Villy
authors.initials: V
authors.lastname: Sundström
authors.forename: Ivan G
authors.initials: IG
authors.lastname: Scheblykin
mesh_terms: D065638:Absorption, Radiation; D017610:Calcium Compounds / Q000737:chemistry* / Q000528:radiation effects*; D003460:Crystallization / Q000379:methods*; D008027:Light; D008163:Luminescent Measurements / Q000379:methods*; D008422:Materials Testing; D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects* / Q000648:ultrastructure; D010087:Oxides / Q000737:chemistry* / Q000528:radiation effects*; D010316:Particle Size; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D017610:Calcium Compounds; D010087:Oxides; C059910:perovskite; D014025:Titanium
keywords: Perovskite; blinking; charge trapping; photoluminescence; single molecule spectroscopy; super-resolution microscopy