RT Journal Article
T1 Engineered optical and electronic properties in β-Ga_2O_3/SnO_2 nanowire networks
A1 Dolado Fernández, Jaime José
A1 Pérez Peinado, Paula
A1 Carrasco Madrigal, Daniel
A1 Martínez Casado, Ruth
A1 Bonino, Valentina
A1 Nogales Díaz, Emilio
A1 Méndez Martín, María Bianchi
A1 Martínez Criado, Gema
AB Integration of semiconductor nanowires is critical for developing scalable and versatile nanodevices, but challenges remain in tailoring optical emission, forming reliable p-n junctions, and ensuring consistent nanoscale interconnection. Here, we investigate Ga2O3/SnO2 multiwire architectures using synchrotron-based X-ray fluorescence (XRF), X-ray excited optical luminescence (XEOL), X-ray absorption near-edge spectroscopy (XANES), and first-principles simulations. We map dopant distribution, analyze nanoscale optical responses, and determine dopant atomic coordination. The central wire is predominantly Sn-doped Ga2O3, while crossed wires are Ga-doped SnO2. XEOL maps reveal a pronounced enhancement of the 3.5 eV ultraviolet emission in Ga2O3 at the junctions, enabling controlled optical modulation. XANES and ab initio calculations confirm that Sn and Ga dopants preferentially occupy octahedral sites, introducing donor levels in Ga2O3 and acceptor levels in SnO2. This research significantly advances our understanding of dopant effects in complex semiconductor nanowire systems, paving the way for controlled optical emissions in Ga2O3/SnO2 multiwire architectures.
PB American Chemical Society
SN 1530-6984
YR 2025
FD 2025-07-11
LK https://hdl.handle.net/20.500.14352/122958
UL https://hdl.handle.net/20.500.14352/122958
LA eng
NO Dolado, J.; Pérez-Peinado, P.; Carrasco, D.; Martínez-Casado, R.; Bonino, V.; Nogales, E.; Méndez, B.; Martínez-Criado, G. Engineered Optical and Electronic Properties in β-Ga2 O3 /SnO2 Nanowire Networks. Nano Lett. 2025, 25 (29), 11299–11307
NO FA8655-20-1-7013 and FA8655-23-1-7002 (Program Manager: Ali Sayir)
NO European Synchrotron Radiation Facility
NO Ministerio de Innovación y Ciencia (España)
NO Agencia Estatal de Investigación (España)
NO European Commission
NO Air Force Office of Scientific Research (US)
DS Docta Complutense
RD 26 feb 2026