Giant Photoluminescence Blinking of Perovskite Nanocrystals Reveals Single-Trap Control of Luminescence
Nano Letters2015Vol. 15(3), pp. 1603–1608
Citations Over TimeTop 1% of 2015 papers
Yuxi Tian, Aboma Merdasa, Maximilian Peter, Mohamed Abdellah, Kaibo Zheng, Carlito S. Ponseca, Tõnu Pullerits, Arkady Yartsev, Villy Sundström, Ivan G. Scheblykin
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.
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