Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 13, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3643473
Keywords
doping; electrical conductivity; elemental semiconductors; graphene; light absorption; monolayers; nanowires; Schottky effect; silicon; solar cells; surface recombination; thin films
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Funding
- National Natural Science Foundation of China [60806028, 51172151, 20901021, 61106010, 21101051, 91027021]
- Chinese Ministry of Education [NCET-08-0764]
- National Basic Research Program of China [2012CB932400]
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Schottky junction solar cells were constructed by combining the monolayer graphene (MLG) films and the Si nanowire (SiNW) arrays. Pronounced photovoltaic characteristics were investigated for devices with both p-MLG/n-SiNWs and n-MLG/p-SiNWs structures. Due to the balance between light absorption and surface carrier recombination, devices made of SiNW arrays with a medium length showed better performance and could be further improved by enhancing the MLG conductivity via appropriate surface treatment or doping. Eventually, a photoconversion efficiency up to 2.15% is obtained by the means of filling the interspace of SiNW array with graphene suspension. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3643473]
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