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Adv Mater. 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.

Author information

1
Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.

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

PMID:
25639896
DOI:
10.1002/adma.201404636

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