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. 2015 Feb 25;27(8):1437-42.
doi: 10.1002/adma.201404636. Epub 2015 Jan 8.

High-performance shortwave-infrared light-emitting devices using core-shell (PbS-CdS) colloidal quantum dots

Geoffrey J Supran  1 , Katherine W Song, Gyu Weon Hwang, Raoul E Correa, Jennifer Scherer, Eric A Dauler, Yasuhiro Shirasaki, Moungi G Bawendi, Vladimir Bulović
Affiliations

High-performance shortwave-infrared light-emitting devices using core-shell (PbS-CdS) colloidal quantum dots

Geoffrey J Supran et al. Adv Mater. .

Abstract

Core-shell PbS-CdS quantum dots enhance the peak external quantum efficiency of shortwave-infrared light-emitting devices by up to 50-100-fold (compared with core-only PbS devices). This is more than double the efficiency of previous quantum-dot light-emitting devices operating at wavelengths beyond 1 μm, and results from the passivation of the PbS cores by the CdS shells against in situ photoluminescence quenching.

Keywords: cation-exchange; colloidal quantum-dots; core-shell; light-emitting devices; shortwave-infrared.

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