High-Performance Shortwave-Infrared Light-Emitting Devices Using Core--Shell (PbS--CdS) Colloidal Quantum Dots

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Publication Type:

Journal Article

Authors:

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

Source:

Adv. Mater., Wiley Online Library, Volume 27, Issue 8, p.1437-1442 (2015)

ISBN:

0935-9648

Keywords:

2015

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.