Journal
APPLIED PHYSICS EXPRESS
Volume 4, Issue 6, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1143/APEX.4.065101
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Funding
- Ministry of Education, Culture, Sports, Science and Technology, Japan
- New Energy and Industrial Technology Development Organization (NEDO), Japan
- Grants-in-Aid for Scientific Research [22740358, 22110501, 22340168, 23654199, 22244072, 19054001, 21654084] Funding Source: KAKEN
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Semiconducting single-walled carbon nanotubes (S-SWNTs) are used to fabricate p-n heterojuctions with n-type Si in order to harvest near-infrared solar energy. Our results demonstrate that S-SWNTs can be used to convert near-infrared light into electrical energy. The performance of solar cells based on C-60-fullerene-encapsualted S-SWNTs is much better than that observed in solar cells fabricated by C-60-encapsulated SWNTs containing both metallic and semiconducting SWNTs. It is found that when the light photon energy exceeds two times the band-gap energy of S-SWNTs, the efficiency suddenly increases, suggesting the occurrence of multiple exciton generation. (C) 2011 The Japan Society of Applied Physics
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