Journal
NANO LETTERS
Volume 9, Issue 9, Pages 3354-3358Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl901637u
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Funding
- Department of Defense (the Air Force Office of Scientific Research
- Defense Advanced Research Projects Agency HARDI Program), Global Photonic Energy Corp
- Universal Display Corp
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We demonstrate that photogenerated excitons in semiconducting carbon nanotubes (CNTs) can be efficiently dissociated by forming a planar heterojunction between CNTs wrapped In semiconducting polymers and the electon acceptor, C-60. Illumination of the CNTs at their near-infrared optical band gap results in the generation of a short-circuit photocurrent with peak external and internal quantum efficiencies of 2.3% and 44%, respectively. Using soft CNT-hybrid materials systems combining semiconducting small molecules and polymers, we have fabricated broad-band photodetectors with a specific detectivity >10(10) cm Hz(1/2) Wt- from lambda = 400 to 1450 nm and a response time of tau = 7.2 +/- 0.2 ns.
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