Journal
NANO LETTERS
Volume 12, Issue 12, Pages 6244-6249Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl303302p
Keywords
Infrared detector; carbon nanotube; P3HT; type-II heterojunction; detectivity
Categories
Funding
- ARO [W911NF-09-1-0295, W911NF-12-1-0412]
- NSF [NSF-DMR-0803149, 1105986, NSF EPSCoR-0903806]
- State of Kansas through Kansas Technology Enterprise Corporation
- University of Kansas
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1105986] Funding Source: National Science Foundation
- Office of Integrative Activities
- Office Of The Director [903806] Funding Source: National Science Foundation
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Despite the potentials and the efforts put in the development of uncooled carbon nanotube infrared detectors during the past two decades, their figure-of-merit detectivity remains orders of magnitude lower than that of conventional semiconductor counterparts due to the lack of efficient exciton dissociation schemes. In this paper, we report an extraordinary photocurrent harvesting configuration at a semiconducting single-walled carbon nanotube (s-SWCNT)/polymer type-H heterojunction interface, which provides highly efficient exciton dissociation through the intrinsic energy offset by designing the s-SWCNT/polymer interface band alignment. This results in significantly enhanced near-infrared detectivity of 2.3 X 10(8) cm.Hz(1/2)/W, comparable to that of the many conventional uncooled infrared detectors. With further optimization, the s-SWCNT/polymer nanohybrid uncooled infrared detectors could be highly competitive for practical applications.
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