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High‐efficiency black silicon interdigitated back contacted solar cells on p‐type and n‐type c‐Si substrates
Author(s) -
Ortega Pablo,
Calle Eric,
Gastrow Guillaume,
Repo Päivikki,
Carrió David,
Savin Hele,
Alcubilla Ramón
Publication year - 2015
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.2664
Subject(s) - passivation , black silicon , silicon , fabrication , crystalline silicon , materials science , optoelectronics , solar cell , photovoltaic system , energy conversion efficiency , optics , nanotechnology , electrical engineering , physics , layer (electronics) , medicine , alternative medicine , engineering , pathology
This work demonstrates the high potential of Al 2 O 3 passivated black silicon in high‐efficiency interdigitated back contacted (IBC) solar cells by reducing surface reflectance without jeopardizing surface passivation. Very low reflectance values, below 0.7% in the 300–1000 nm wavelength range, together with striking surface recombination velocities values of 17 and 5 cm/s on p‐type and n‐type crystalline silicon substrates, respectively, are reached. The simultaneous fulfillment of requirements, low reflectance and low surface recombination, paves the way for the fabrication of high‐efficiency IBC Si solar cells using black silicon at their front surface. Outstanding photovoltaic efficiencies over 22% have been achieved both in p‐type and n‐type 9‐cm 2 cells. 3D simulations suggest that efficiencies of up to 24% can be obtained in the future with minor modifications in the baseline fabrication process. Copyright © 2015 John Wiley & Sons, Ltd.