Table 1 Binding energies (BE, ±0.1 eV) and full width at half maximum (FWHM) (±0.05 eV) data of individual components determined from curve fitting of S 2p and As 3d XPS spectra of as-deposited and illuminated by green (λ = 532 nm) laser As40S60, As45S55, and As50S50 nanolayers
Core level/component | As40S60 | As45S55 | As50S50 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
As received | Illuminated | As received | Illuminated | As received | Illuminated | |||||||
BE | FWHM | BE | FWHM | BE | FWHM | BE | FWHM | BE | FWHM | BE | FWHM | |
S 2p: | ||||||||||||
S–As2 | 162.1 | 1.2 | 162.1 | 1.2 | 162.1 | 1.2 | 162.2 | 1.1 | 162.1 | 1.1 | 162.1 | 1.1 |
S–SAs | 163.2 | 1.3 | 163.2 | 1.1 | 163.3 | 1.3 | 163.2 | 0.9 | 163.1 | 1.1 | 163.1 | 1.3 |
As 3d: | ||||||||||||
As–S3 | 43.0 | 1.3 | 43.0 | 1.3 | 43.0 | 1.3 | 42.9 | 1.2 | 42.9 | 1.5 | 42.9 | 1.3 |
As–S2As | 42.5 | 1.3 | 42.5 | 1.3 | 42.4 | 1.2 | 42.5 | 1.2 | 42.5 | 1.0 | 42.5 | 1.3 |
As–SAs2 | 42.0 | 1.3 | 42.0 | 1.3 | 42.0 | 1.3 | 42.1 | 1.2 | 42.0 | 1.5 | 42.0 | 1.3 |
As–As3 | – | – | – | – | 41.5 | 1.3 | 41.5 | 1.2 | – | – | – | – |