| 첨부 '2' |
|---|
| author | Kwang Seob Jeong |
|---|---|
| journal | Nano Letters |
| Homepage | https://kwangsjeong.wixsite.com/ksjlab-koreauniv |
김가현(제1저자, 석박통합과정)
Demands on nontoxic nanomaterials in the short-wavelength infrared (SWIR) have rapidly grown over the past decade. Here, we present the nonstoichiometric silver chalcogenide nanocrystals of AgxTe (x > 2) and Ag2Te/Ag2S CQDs with a tunable bandgap across the SWIR region. When the atomic percent of the metal and chalcogenide elements are varied, the emission frequency of the excitonic peak is successfully extended to 2.7 μm. Surprisingly, the AgxTe CQD film responds to the SWIR light with a responsivity of 2.1 A/W at 78 K. Also, the Ag2S shell growth over the Ag2Te core enhances not only the emission intensity but also the structural rigidity, preventing crystal morphology deformation under the electron beam. The origin of the enhancement in the emission intensity and air stability of AgxTe and Ag2Te/Ag2S CQDs is carefully investigated by X-ray photoelectron spectroscopy (XPS). The optical properties and infrared photocurrent of AgxTe CQDs will provide new opportunities for solution-based SWIR applications.
Vertical-crystalline Fe-doped β-Ni oxyhydroxides for highly a...
Enhanced Thermopower of Saturated Molecules by Noncovalent An...
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Vertical-crystalline Fe-doped β-Ni oxyhydroxides for highly active and stable oxygen evolution reaction
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Extended Short-Wavelength Infrared Photoluminescence and Photocurrent of Nonstoichiometric Silver Telluride Colloidal Nanocrystals
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Enhanced Thermopower of Saturated Molecules by Noncovalent Anchor-Induced Electron Doping of Single-Layer Graphene Electrode
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Mechanical Force for the Transformation of Aziridine into Imine
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A Small Molecule Strategy for Targeting Cancer Stem Cells in Hypoxic Microenvironments and Preventing Tumorigenesis
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Deep Learning Optical Spectroscopy Based on Experimental Database: Potential Applications to Molecular Design
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Synergistic Effects on Lithium Metal Batteries by Preferential Ionic Interactions in Concentrated Bisalt Electrolytes
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Superexchange Coupling-Induced Enhancements of Thermoelectric Performance in Saturated Molecules
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High Ammonia Uptake of a Metal–Organic Framework Adsorbent in a Wide Pressure Range
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