Single Cesium Lead Halide Perovskite Nanocrystals at Low Temperature: Fast Single-Photon Emission, Reduced Blinking, and Exciton Fine Structure | Zendy

Gabriele Rainò | Zendy; Georgian Nedelcu | Zendy; Loredana Proteşescu | Zendy; Maryna I. Bodnarchuk | Zendy; Maksym V. Kovalenko | Zendy; Rainer F. Mahrt | Zendy; Thilo Stöferle | Zendy

Open Access

Single Cesium Lead Halide Perovskite Nanocrystals at Low Temperature: Fast Single-Photon Emission, Reduced Blinking, and Exciton Fine Structure

Author(s) -

Gabriele Rainò,

Georgian Nedelcu,

Loredana Proteşescu,

Maryna I. Bodnarchuk,

Maksym V. Kovalenko,

Rainer F. Mahrt,

Thilo Stöferle

Publication year - 2016

Publication title -

acs nano

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.554

H-Index - 382

eISSN - 1936-086X

pISSN - 1936-0851

DOI - 10.1021/acsnano.5b07328

Subject(s) - perovskite (structure) , halide , exciton , nanocrystal , materials science , biexciton , photovoltaics , caesium , chemical physics , semiconductor , photoluminescence , spectroscopy , quantum dot , optoelectronics , nanotechnology , chemistry , physics , inorganic chemistry , condensed matter physics , crystallography , ecology , quantum mechanics , photovoltaic system , biology

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.

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