Thin film surface processing by ultrashort laser pulses (USLP)

D. Scorticati, J.Z.P. Skolski, Gerardus Richardus, Bernardus, Engelina Römer, Bert Huis in 't Veld, M. Workum, M. Theelen, M. Zeman

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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Abstract

In this work, we studied the feasibility of surface texturing of thin molybdenum layers on a borosilicate glass substrate with Ultra-Short Laser Pulses (USLP). Large areas of regular diffraction gratings were produced consisting of Laserinduced periodic surface structures (LIPSS). A short pulsed laser source (230 fs-10 ps) was applied using a focused Gaussian beam profile (15-30 μm). Laser parameters such as fluence, overlap (OL) and Overscans (OS), repetition frequency (100-200 kHz), wavelength (1030 nm, 515 nm and 343 nm) and polarization were varied to study the effect on periodicity, height and especially regularity of LIPSS obtained in layers of different thicknesses (150-400 nm). The aim was to produce these structures without cracking the metal layer and with as little ablation as possible. It was found that USLP are suitable to reach high power densities at the surface of the thin layers, avoiding mechanical stresses, cracking and delamination. A possible photovoltaic (PV) application could be found in texturing of thin film cells to enhance light trapping mechanisms
Original languageUndefined
Title of host publicationProceedings SPIE 8438, Photonics for Solar Energy Systems IV
EditorsR. Wehrspohn, A. Gombert
Place of PublicationBrussels, Belgium
PublisherSPIE-International Society for Optics and Photonics
Pages1-8
DOIs
Publication statusPublished - 16 Apr 2012
EventSPIE 8438, Photonics for Solar Energy Systems IV - Brussels, Belgium
Duration: 16 Apr 201219 Apr 2012

Publication series

Name
PublisherSPIE-International Society for Optics and Photonics

Conference

ConferenceSPIE 8438, Photonics for Solar Energy Systems IV
Period16/04/1219/04/12
Other16-04-2012 - 19-04-2012

Keywords

  • IR-81998
  • METIS-288714

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