The light conversion efficiency of traditional a-Si thin-film solar cells is limited by their low optical thicknesses, especially in the NIR. A possible approach to increase the light-trapping efficiency over the entire solar spectral range is to design solar-cell architectures which rely on the optical properties of plasmonic nanocomposite materials. We demonstrate that it is possible to have a controlled Gold nanoparticle optical absorption by varying the thickness of a covering a-Si thin-film. For thick a-Si films the Gold nanoparticle plasmon resonance vanishes likely due to the formation of a silicide. Optical absorption measurements as well as finite difference time-domain (FDTD) simulations were employed to determine the a-Si thickness-dependent optical absorption properties, which demonstrated a significantly increased optical absorption in a-Si.
Increasing the optical absorption in a-Si thin films by embedding gold nanoparticles / G. Faraone, R. Modi, S. Marom, A. Podesta, M. Di Vece. - In: OPTICAL MATERIALS. - ISSN 0925-3467. - 75(2018 Jan), pp. 204-210.
|Titolo:||Increasing the optical absorption in a-Si thin films by embedding gold nanoparticles|
DI VECE, MARCEL (Corresponding)
|Parole Chiave:||a-Si; gold nanoparticle; plasmonics; solar cell; thin films; electronic, optical and magnetic materials; computer science (all); atomic and molecular physics, and optics; electrical and electronic engineering|
|Settore Scientifico Disciplinare:||Settore FIS/01 - Fisica Sperimentale|
|Data di pubblicazione:||gen-2018|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.optmat.2017.10.025|
|Appare nelle tipologie:||01 - Articolo su periodico|