RT info:eu-repo/semantics/masterThesis
T1 Unveiling the Optical Properties of InP/InGaP Nanowires using Spectroscopic Characterization Techniques
T2 Revelando las propiedades ópticas de nanohilos de InP/InGaP a través de técnicas de caracterización espectroscópica
A1 Hinojosa Chasiquiza, Vanessa Giselle
A2 Universidad de Valladolid. Facultad de Ciencias
K1 Raman
K1 Photoluminescence
K1 Axiallyhetero-structured nanowires(NWs)
AB Semiconductor nanowires are promising materials for the next generation of tandem solar cells. Its dimension allows one to combine a large variety of materials not allowed in planar solar cells because of the large lattice mismatch. Nanowires have also shown great potential in electrical, biomedical, photonics, and other applications. Different configurations, doping, and concentrations have been used. Therefore, understanding the nanowire properties is crucial to grow nanowires for different applications. In that context, optical techniques are very powerful non-invasive tools for charac- terizing semiconductor nanowires. In this work, we have characterized axially hetero-structured InP/InGaP nanowires with micro-Raman spectroscopy, micro-photoluminescence, tip-enhanced Raman spectroscopy, tip-enhanced photoluminescence, and energy-dispersive X-ray analysis. We found peculiar optical phenomena along the nanowire, which consists of two p n junctions made of InP and InGaP, respectively, axially bridged by a n+-InP/p+-InGaP tunnel diode. In particular, a local resonance at the tunnel junction is accompanied by the breakdown of the Raman selection rules. Furthermore, plasmon damped mode was observed in the heavily p-type doped side of the tunnel junction.  Photoluminescence measurements allowed to detect the presence of a parasitic InGaP layer grown laterally at the bottom of the nanowire.
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/57894
UL https://uvadoc.uva.es/handle/10324/57894
LA eng
NO Departamento de Física de la Materia Condensada, Cristalografía y Mineralogía
DS UVaDOC
RD 01-jun-2024