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

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

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...

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Veröffentlicht in:ACS nano 2016-02, Vol.10 (2), p.2485-2490
Hauptverfasser: Rainò, Gabriele, Nedelcu, Georgian, Protesescu, Loredana, Bodnarchuk, Maryna I, Kovalenko, Maksym V, Mahrt, Rainer F, Stöferle, Thilo
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container_end_page 2490
container_issue 2
container_start_page 2485
container_title ACS nano
container_volume 10
creator Rainò, Gabriele
Nedelcu, Georgian
Protesescu, Loredana
Bodnarchuk, Maryna I
Kovalenko, Maksym V
Mahrt, Rainer F
Stöferle, Thilo
description 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.
doi_str_mv 10.1021/acsnano.5b07328
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title Single Cesium Lead Halide Perovskite Nanocrystals at Low Temperature: Fast Single-Photon Emission, Reduced Blinking, and Exciton Fine Structure
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