Journal
NANO LETTERS
Volume 9, Issue 2, Pages 860-863Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl803760j
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Funding
- U.S. Army through the Institute for Soldier Nanotechnologies [W911NF-07-D-0004]
- National Science Foundation [DMR 02-13282]
- Fannie and John Hertz Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [819762] Funding Source: National Science Foundation
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We demonstrate a bilayer photovoltaic device consisting of a heterojunction between colloidal cadmium selenide (CdSe) quantum dots (QDs) and a wide band gap organic hole-transporting thin film of N,N'-diphenyl-N,N'-bis(3-methylphenyl)[1,1'-biphenyl]-4,4'-diamine (TPD) molecules. The active light-absorbing film of QDs is nondestructively printed onto TPD using microcontact stamping. Indium-tin-oxide (ITO) provides the top contact. The resulting device structure can accommodate different size ON, produces an exceptionally large open circuit voltage (0.8 V) for an architecture with symmetric electrodes, and yields an internal quantum efficiency of 10% at the first QD absorption peak.
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