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Nanoimprinted Tio 2 sol–gel passivating diffraction gratings for solar cell applications
Author(s) -
Barbé Jérémy,
Thomson Andrew Francis,
Wang ErChien,
McIntosh Keith,
Catchpole Kylie
Publication year - 2012
Publication title -
progress in photovoltaics: research and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.286
H-Index - 131
eISSN - 1099-159X
pISSN - 1062-7995
DOI - 10.1002/pip.1131
Subject(s) - materials science , fabrication , nanoimprint lithography , diffraction , optoelectronics , silicon , sol gel , characterization (materials science) , optics , diffraction efficiency , nanotechnology , grating , physics , pathology , medicine , alternative medicine
We report the fabrication and characterization of TiO 2 sol–gel diffraction gratings on silicon substrates by using nanoimprint lithography. The gratings are homogeneous and free of defects and cover an area of 25 cm 2 . Minority carrier lifetimes of up to 900 µs for imprinted samples under illumination are reported, which Kelvin probe measurements indicate is due to light‐generated negative charge in the films. The structures reported here are very promising as light‐trapping, passivating coatings for solar cells. Copyright © 2011 John Wiley & Sons, Ltd.