Iodide capped PbS/CdS core-shell quantum dots for efficient long-wavelength near-infrared light-emitting diodes.

ABSTRACT: PbS based quantum dots (QDs) have been studied in great detail for potential applications in electroluminescent devices operating at wavelengths important for telecommunications (1.3-1.6??m). Despite the recent advances in field of quantum dot light-emitting diode (QLED), further improvements in near-infrared (NIR) emitting device performance are still necessary for the widespread use and commercialization of NIR emitting QLED technology. Here, we report a high-performance 1.51-?m emitting QLED with inverted organic-inorganic hybrid device architecture and PbS/CdS core-shell structured quantum dots as emitter. The resultant QLEDs show a record device performance for the QLEDs in 1.5??m emission window, with a maximum radiance of 6.04 Wsr-1 m-2 and peak external quantum efficiency (EQE) of 4.12%, respectively.

SUBMITTER: Yang X 

PROVIDER: S-EPMC5677035 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature