X-Ray Photoelectron Study of Yb-Doped InP

Abstract

X-ray photoelectron spectra of core levels are reported for InP:Yb. Crystalline InP, doped with Yb to a level of 0.5 at.%, was grown by the synthesized solute diffusion method. An analysis of the core-level spectra of the constituent components, i.e. In 3d512 and P 2p, revealed a minor influence of the surface oxide species, mainly in the phosphate-like form. The spectrum of the Yb 4d core level was also recorded. The energy of the Yb 4d312 peak was found identical to that in Yb metal, whereas the 4d512 peak was found to be shifted to higher binding energies. This effect was found comparable to the case of advanced oxidation of Yb thus confirming its high reactivity, even as a bulk dopant. The data give also a rare experimental example of detection of bulk dopant atoms in a semiconductor matrix by X-ray photoelectron spectroscopy at the limit of detectability.

Structural, Spectroscopic, and Excitonic Dynamic Characterization in Atomically Thin Yb3+‐Doped MoS2, Fabricated by Femtosecond Pulsed Laser Deposition

“…Yb 3+ ions are clearly present in the 2 nm thick doped MoS 2 film. This is confirmed by the binding energy of Yb‐4d 5/2 peak at 185.3 ± 0.5 eV which is consistent with the Yb being in the 3+ oxidation state with a sulfur co‐ordination shell, with concentration of Yb 3+ ‐ions around 1 ion%. For comparison, the core level spectra of molybdenum (Mo) and sulfur (S) are also presented in Figure S2 (Supporting Information).…”

Beneficial effects of water in the colloidal synthesis of InP/ZnS core–shell quantum dots for optoelectronic applications

“…This further confirms the presence of a phosphate layer in the QDs synthesized with water. 52,53 The quantitative data obtained for both the QDs suggest an indium rich surface (In/P atomic ratio −1.5) for the samples synthesized without water and a phosphorus rich surface (In/P atomic ratio -0.8) for QDs synthesized with water. Besides In 3d and P 2p peaks, XPS also detected the presence of a small amount of Zn 2+ ions in both the QDs (Fig.…”

White-light emission in Yb3+/Er3+/Tm3+- and Yb3+/Er3+/Tm3+/Ho3+-doped α-NiMoO4 nanoparticles

“…The O 1 s spectrum consists of two peaks, the O 2species in the lattice and chemisorbed oxygen species (figures 6(c), (f), and (k)) [24]. The existence of Yb 4d 5/2 and 4d 3/2 in samples reveals the existence of Yb 3+ ions [11,25]. The XPS peaks ( 3 G 4 , 3 D 3 and 3 P 2 and 1 H 5 ) confirmed the existence of Yb 2+ ions (figures 6(g) and (l)) [11,26,27].…”