Narrow-Band Absorption-Enhanced Quantum Dot/J-Aggregate Conjugates
Author(s)Walker, Brian J.; Nair, Gautham Padmanabhan; Marshall, Lisa F.; Bawendi, Moungi G.; Bulovic, Vladimir
MetadataShow full item record
We report narrow-band absorption enhancement of semiconductor nanocrystals via Förster resonance energy transfer from cyanine J-aggregates. These J-aggregated dyes associate electrostatically with short quantum-dot (QD) surface ligands in solution. Energy transfer efficiencies approach unity for this light sensitization and result in a 5-fold enhancement in the QD excitation near the J-aggregate absorption maximum. Because a thin layer of J-aggregates attenuates the same amount of light (at peak absorbance) as a far thicker film of monomer dye, these absorption-enhanced materials may have applications in light-sensitizing applications such as photodetection and optical down-conversion.
DepartmentMassachusetts Institute of Technology. Department of Chemistry; Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Microsystems Technology Laboratories
Journal of the American Chemical Society
American Chemical Society (ACS)
Walker, Brian J., Gautham P. Nair, Lisa F. Marshall, Vladimir Bulović, and Moungi G. Bawendi. “Narrow-Band Absorption-Enhanced Quantum Dot/J-Aggregate Conjugates.” Journal of the American Chemical Society 131, no. 28 (July 22, 2009): 9624-9625.
Author's final manuscript