Tuning the bandgap of exfoliated InSe nanosheets by quantum confinement.
basic_science · Level V
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- Record sourced from PubMed, PMID 23966225.
- Also identified by DOI 10.1002/adma.201302616 and PMC identifier 4065344.
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Abstract
Strong quantization effects and tuneable near-infrared photoluminescence emission are reported in mechanically exfoliated crystals of γ-rhombohedral semiconducting InSe. The optical properties of InSe nanosheets differ qualitatively from those reported recently for exfoliated transition metal dichalcogenides and indicate a crossover from a direct to an indirect band gap semiconductor when the InSe flake thickness is reduced to a few nanometers.