Ultrafast Photophysics of Pentacene Coupled to Surface Plasmon Active Nanohole Films

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Journal of Physical Chemistry C

DOI:https://doi.org/10.1021/jp901419s· OSTI ID:958243

Johnson, J C; Reilly, III, T R; Kanarr, A C; van de Lagemaat, J

Pentacene, a model organic semiconductor, is shown to couple with surface plasmon (SP) active silver nanohole films to produce enhanced excited-state absorption. In addition, the dynamics of triplet formation and decay on a subpicosecond time scale are altered due to the coupling of the excited state with the resonant SP, possibly involving the interplay between singlet fission and triplet-triplet annihilation. Shifting the resonance of the SP with respect to the pentacene excitations and introducing a dielectric spacer between pentacene and metal lead to changes in the spectra and dynamics that can be explained qualitatively. These results are compared with recent literature reports of molecule/plasmon hybridization and are placed in context with efforts to utilize SPs for enhanced solar energy conversion.

• Research Organization: National Renewable Energy Lab. (NREL), Golden, CO (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC36-99-GO10337
• OSTI ID: 958243
• Journal Information: Journal of Physical Chemistry C, Vol. 113, Issue 16, 2009; ISSN 1932-7447
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
ANNIHILATION
DECAY
DIELECTRIC MATERIALS
EXCITED STATES
FISSION
HYBRIDIZATION
ORGANIC SEMICONDUCTORS
PENTACENE
PLASMONS
RESONANCE
SILVER
SOLAR ENERGY CONVERSION
SPACERS
SPECTRA
TRIPLETS
Chemical and Biosciences