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- W4236533514 abstract "Two-dimensional (2D) transition metal dichalcogenides have emerged as a promising material system for optoelectronic applications, but their primary figure of merit, the room-temperature photoluminescence quantum yield (QY), is extremely low. The prototypical 2D material molybdenum disulfide (MoS2) is reported to have a maximum QY of 0.6%, which indicates a considerable defect density. Here we report on an air-stable, solution-based chemical treatment by an organic superacid, which uniformly enhances the photoluminescence and minority carrier lifetime of MoS2 monolayers by more than two orders of magnitude. The treatment eliminates defect-mediated nonradiative recombination, thus resulting in a final QY of more than 95%, with a longest-observed lifetime of 10.8 ± 0.6 nanoseconds. Our ability to obtain optoelectronic monolayers with near-perfect properties opens the door for the development of highly efficient light-emitting diodes, lasers, and solar cells based on 2D materials." @default.
- W4236533514 created "2022-05-12" @default.
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- W4236533514 date "2015-11-26" @default.
- W4236533514 modified "2023-10-14" @default.
- W4236533514 title "Near-unity photoluminescence quantum yield in MoS2" @default.
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- W4236533514 doi "https://doi.org/10.1126/science.aad2114" @default.
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