Angstrom-Resolved Interfacial Structure In Buried Organic-Inorganic Junctions
PHYSICAL REVIEW LETTERS(2021)
摘要
Charge transport processes at interfaces play a crucial role in many processes. Here, the first soft x-ray second harmonic generation (SXR SHG) interfacial spectrum of a buried interface (boron-Parylene N) is reported. SXR SHG shows distinct spectral features that are not observed in x-ray absorption spectra, demonstrating its extraordinary interfacial sensitivity. Comparison to electronic structure calculations indicates a boron-organic separation distance of 1.9 angstrom, with changes of less than 1 angstrom resulting in easily detectable SXR SHG spectral shifts (ca. hundreds of milli-electron volts).
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