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  • Title: Iodide capped PbS/CdS core-shell quantum dots for efficient long-wavelength near-infrared light-emitting diodes.
    Author: Yang X, Ren F, Wang Y, Ding T, Sun H, Ma D, Sun XW.
    Journal: Sci Rep; 2017 Nov 07; 7(1):14741. PubMed ID: 29116136.
    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 μm). 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-μm 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 μm emission window, with a maximum radiance of 6.04 Wsr-1 m-2 and peak external quantum efficiency (EQE) of 4.12%, respectively.
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