Journal
APPLIED PHYSICS LETTERS
Volume 97, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3518066
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Funding
- Global Research Laboratory (GRL) [K20607000004]
- National Research Foundation of Korea (NRF) [20090093869, 2010-0000499]
- Asian Office of Aerospace and Development (AOARD) [09-4035]
- AFOSR
- Ministry of Education, Science and Technology [2009-0093818]
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The fullerene derivative C-60-fused N-methyl-2-(3-hexylthiophen-2-yl) pyrrolidine (C-60-TH-Hx) is used as the acceptor material in bulk-heterojunction (BHJ) solar cells fabricated with the low band-gap polymer poly[4,4'-bis(2-ethylhexyl)dithiene[3,2-b:2',3'-d]silole)-2,6-diyl-alt-(4,7-bis(2-thienyl)-2,1,3-benzothiadiazole)-5,5'-diyl]. Direct comparison with BHJ solar cells based on [6,6]-phenyl-C-61-butyric methyl ester and Si-PCPDTBT indicates that the C-60-TH-Hx acceptor yields a larger open-circuit voltage because of higher lowest unoccupied molecular orbital energy level of C-60-TH-Hx. (C) 2010 American Institute of Physics. [doi:10.1063/1.3518066]
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