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A Stress‐Free and Textured GaP Template on Silicon for Solar Water Splitting
Author(s) -
Lucci Ida,
Charbonnier Simon,
Vallet Maxime,
Turban Pascal,
Léger Yoan,
Rohel Tony,
Bertru Nicolas,
Létoublon Antoine,
Rodriguez JeanBaptiste,
Cerutti Laurent,
Tournié Eric,
Ponchet Anne,
Patriarche Gilles,
Pedesseau Laurent,
Cornet Charles
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201801585
Subject(s) - vicinal , scanning tunneling microscope , materials science , ohmic contact , band gap , silicon , molecular beam epitaxy , optoelectronics , substrate (aquarium) , stress (linguistics) , nanotechnology , chemistry , epitaxy , linguistics , oceanography , organic chemistry , philosophy , layer (electronics) , geology
Abstract This work shows that a large‐scale textured GaP template monolithically integrated on Si can be developed by using surface energy engineering, for water‐splitting applications. The stability of (114)A facets is first shown, based on scanning tunneling microscopy images, transmission electron microscopy, and atomic force microscopy. These observations are then discussed in terms of thermodynamics through density functional theory calculations. A stress‐free nanopatterned surface is obtained by molecular beam epitaxy, composed of a regular array of GaP (114)A facets over a 2 in. vicinal Si substrate. The advantages of such textured (114)A GaP/Si template in terms of surface gain, band lineups, and ohmic contacts for water‐splitting applications are finally discussed.