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- W4224222487 abstract "Colloidal semiconductor quantum dots (QDs) can be considered a promising material platform for solution-processed laser diodes. However, due to some fundamental challenges, the realization of electrically pumped lasing based on QDs remains unresolved. Here, a binary blend of QDs and ZnO nanocrystals is employed, which serve as nano-sized scatterers to facilitate waveguide gain in ultra-thin films. By carefully engineering the electric field in these films, an infrared amplified spontaneous emission in a record thin colloidal gain medium is observed, with a thickness of 16 nm, at a wavelength of 1675 nm. Employing these binary blends as a gain medium, an optically pumped infrared stimulated emission in a full-stacked light-emitting diode (LED) device is demonstrated. The functional LED device, which comprises a single layer of graphene as an anode electrode, shows strong electroluminescence under electrical injection. This study suggests a promising device for realizing infrared QD-based laser diodes." @default.
- W4224222487 created "2022-04-26" @default.
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- W4224222487 date "2022-04-08" @default.
- W4224222487 modified "2023-10-16" @default.
- W4224222487 title "Ultra‐Thin Infrared Optical Gain Medium and Optically‐Pumped Stimulated Emission in PbS Colloidal Quantum Dot LEDs" @default.
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- W4224222487 doi "https://doi.org/10.1002/adfm.202200832" @default.
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