%0 Journal Article %A Rainò, Gabriele %A Nedelcu, Georgian %A Protesescu, Loredana %A Bodnarchuk, Maryna I. %A Kovalenko, Maksym V. %A Mahrt, Rainer F. %A Stöferle, Thilo %D 2016 %T Single Cesium Lead Halide Perovskite Nanocrystals at Low Temperature: Fast Single-Photon Emission, Reduced Blinking, and Exciton Fine Structure %U https://acs.figshare.com/articles/journal_contribution/Single_Cesium_Lead_Halide_Perovskite_Nanocrystals_at_Low_Temperature_Fast_Single_Photon_Emission_Reduced_Blinking_and_Exciton_Fine_Structure/2067597 %R 10.1021/acsnano.5b07328.s001 %2 https://acs.figshare.com/ndownloader/files/3678876 %K radiative decay %K exciton dynamics %K Halide Perovskite Nanocrystals %K 250 ps %K light sources %K Reduced Blinking %K perovskite crystal structure %K emission process %K Single Cesium %K solution processability %K Low Temperature %K quantum emitters %K Photon antibunching %X Metal-halide semiconductors with perovskite crystal structure are attractive due to their facile solution processability, and have recently been harnessed very successfully for high-efficiency photovoltaics and bright light sources. Here, we show that at low temperature single colloidal cesium lead halide (CsPbX3, where X = Cl/Br) nanocrystals exhibit stable, narrow-band emission with suppressed blinking and small spectral diffusion. Photon antibunching demonstrates unambiguously nonclassical single-photon emission with radiative decay on the order of 250 ps, representing a significant acceleration compared to other common quantum emitters. High-resolution spectroscopy provides insight into the complex nature of the emission process such as the fine structure and charged exciton dynamics. %I ACS Publications