Plasmon-enhanced charge carrier generation in organic photovoltaic films using silver nanoprisms.
We use photoinduced absorption spectroscopy to measure long-lived photogenerated charge carriers in optically thin donor/acceptor conjugated polymer blend films near plasmon-resonant silver nanoprisms. We measure up to 3 times more charge generation, as judged by the magnitude of the polaron absorption signal, in 35 nm thin blend films of poly(3-hexylthiophene)/phenyl-C(61)-butyric acid methyl ester on top of films of silver nanoprisms (approximately 40-100 nm edge length). We find that the polaron yields increase linearly with the total sample extinction. These excitation enhancements could in principle be used to increase photocurrents in thin organic solar cells.
Kulkarni
Abhishek P
AP
Department of Chemistry, University of Washington, Seattle, Washington 98195, USA.
Noone
Kevin M
KM
Munechika
Keiko
K
Guyer
Samuel R
SR
Ginger
David S
DS
D008567:Membranes, Artificial; D053768:Metal Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013053:Spectrophotometry; D013499:Surface Properties
D008567:Membranes, Artificial; D011108:Polymers; D012834:Silver