RT Journal Article
T1 Tuning spike-like morphologies in silicon by sustainable fs-laser processing in air for enhanced light absorption
A1 Gómez-Muñoz, Gonzalo
A1 Benítez Fernández, Rafael
A1 Godoy-Perez, Guillermo
A1 Cabello, Fátima
A1 Garcia-Pardo, Marina
A1 Caudevilla Gutiérrez, Daniel
A1 Gonzalo, José
A1 Solis, Javier
A1 Olea Ariza, Javier
A1 Pastor Pastor, David
AB In this work, we demonstrate that ultrafast laser processing (1030 nm, 290 fs) of silicon in ambient air strongly improves the material's performance in terms of absorption, both in the visible and near infrared spectral range, which paves the way for further studies on increasing the sub-bandgap absorption after texturing, suggesting the material developed as a sustainable substitute for black silicon processed in greenhouse gases atmospheres. Our approach is based on the fabrication of spike-like morphologies in ambient air and the subsequent annealing of the material by pulsed laser melting or rapid thermal annealing to recover its crystalline phase. In particular, the influence of three main processing parameters (fluence, pulse number and repetition rate) on the properties of the spike-like structures has been investigated, each of them revealing the possibility of a direct control on the size, shape and period of the spikes, and achieving a total tuning range of the period from 4 mu m to 14 mu m for a single laser wavelength. Macroscopic areas have been fabricated using short processing times, yielding absorption values A > 94% over the UV-VIS-NIR spectral range (250 nm - 1100 nm) without hyperdoping, and A >= 20% for longer wavelengths up to 2500 nm, while preserving the electrical performance of pristine silicon.
PB Elsevier
SN 0169-4332
YR 2025
FD 2025-03
LK https://hdl.handle.net/20.500.14352/128904
UL https://hdl.handle.net/20.500.14352/128904
LA eng
NO Gomez-Munoz, Gonzalo, et al. «Tuning Spike-like Morphologies in Silicon by Sustainable Fs-Laser Processing in Air for Enhanced Light Absorption». Applied Surface Science, vol. 686, marzo de 2025, p. 161967. DOI.org (Crossref), https://doi.org/10.1016/j.apsusc.2024.161967.
NO Firmado por 12 autores.
NO HyperSolar
NO Unión Europea
NO Ministerio de Ciencia, Innovación y Universidades (España)
NO Ministerio de Trabajo y Economia Social (España)
DS Docta Complutense
RD 31 dic 2025