TY - JOUR
T1 - Chemical synthesis and optical, structural, and surface characterization of InP-In2O3 quantum dots
AU - Granada-Ramirez, D. A.
AU - Arias-Cerón, J. S.
AU - Pérez-González, M.
AU - Luna-Arias, J. P.
AU - Cruz-Orea, A.
AU - Rodríguez-Fragoso, P.
AU - Herrera-Pérez, J. L.
AU - Gómez-Herrera, M. L.
AU - Tomás, S. A.
AU - Vázquez-Hernández, F.
AU - Durán-Ledezma, A. A.
AU - Mendoza-Alvarez, J. G.
N1 - Publisher Copyright:
© 2020
PY - 2020/11/15
Y1 - 2020/11/15
N2 - InP-In2O3 colloidal quantum dots (QDs) synthesized by a single-step chemical method without injection of hot precursors (one-pot) were investigated. Specifically, the effect of the tris(trimethylsilyl)phosphine, P(TMS)3, precursor concentration on the QDs properties was studied to effectively control the size and shape of the samples with a minimum size dispersion. The effect of the P(TMS)3 precursor concentration on the optical, structural, chemical surface, and electronic properties of InP-In2O3 QDs is discussed. The absorption spectra of InP-In2O3 colloids, obtained by both UV–Vis spectrophotometry and photoacoustic spectroscopy, showed a red-shift in the high-energy regime as the concentration of the P(TMS)3 increased. In addition, these results were used to determine the band-gap energy of the InP-In2O3 nanoparticles, which changed between 2.0 and 2.9 eV. This was confirmed by Photoluminescence spectroscopy, where a broad-band emission displayed from 2.0 to 2.9 eV is associated with the excitonic transition of the InP and In2O3 QDs. In2O3 and InP QDs with diameters ranging approximately from 8 to 10 nm and 6 to 9 nm were respectively found by HR-TEM. The formation of the InP and In2O3 phases was confirmed by X-ray Photoelectron Spectroscopy.
AB - InP-In2O3 colloidal quantum dots (QDs) synthesized by a single-step chemical method without injection of hot precursors (one-pot) were investigated. Specifically, the effect of the tris(trimethylsilyl)phosphine, P(TMS)3, precursor concentration on the QDs properties was studied to effectively control the size and shape of the samples with a minimum size dispersion. The effect of the P(TMS)3 precursor concentration on the optical, structural, chemical surface, and electronic properties of InP-In2O3 QDs is discussed. The absorption spectra of InP-In2O3 colloids, obtained by both UV–Vis spectrophotometry and photoacoustic spectroscopy, showed a red-shift in the high-energy regime as the concentration of the P(TMS)3 increased. In addition, these results were used to determine the band-gap energy of the InP-In2O3 nanoparticles, which changed between 2.0 and 2.9 eV. This was confirmed by Photoluminescence spectroscopy, where a broad-band emission displayed from 2.0 to 2.9 eV is associated with the excitonic transition of the InP and In2O3 QDs. In2O3 and InP QDs with diameters ranging approximately from 8 to 10 nm and 6 to 9 nm were respectively found by HR-TEM. The formation of the InP and In2O3 phases was confirmed by X-ray Photoelectron Spectroscopy.
KW - InO
KW - InP
KW - Photoluminescence
KW - Quantum dots
KW - XPS
KW - XRD
UR - http://www.scopus.com/inward/record.url?scp=85088650369&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2020.147294
DO - 10.1016/j.apsusc.2020.147294
M3 - Artículo
AN - SCOPUS:85088650369
SN - 0169-4332
VL - 530
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 147294
ER -