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Structural defects are known to worsen electrical and optical properties of 2D materials. Transition metal dichalcogenides (TMDs) are prone to chalcogen vacancies and molecular functionalization of these vacancies offers a powerful strategy to engineer the crystal structure by healing such defects. This molecular approach can effectively improve physical properties of 2D materials and optimize the...
A 2D system of Er‐doped MoS2 layered nanosheets is developed. Structural studies indicate that the Er atoms can be substitutionally introduced into MoS2 to form stable doping. Density functional theory calculation implies that the system remains stable. Both NIR‐to‐NIR up‐conversion and down‐conversion light‐emissions are observed in 2D transition metal dichalcogenides, ascribed to the energy transition...
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