TY - JOUR
T1 - Visualizing charge movement near organic heterojunctions with ultrafast time resolution via an induced Stark shift
AU - Wiederrecht, Gary P.
AU - Giebink, Noel C.
AU - Hranisavljevic, Jasmina
AU - Rosenmann, Daniel
AU - Martinson, Alex B.F.
AU - Schaller, Richard D.
AU - Wasielewski, Michael R.
N1 - Funding Information:
G.P.W., N.C.G., J.H., R.S., and D.R. acknowledge use of the Center for Nanoscale Materials for the experimental portion of this work, which is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences through Contract No. DE-AC02-06CH11357. N.C.G. and M.R.W. acknowledge support for data analysis and manuscript preparation, and A.B.F.M. acknowledges support for the atomic layer deposition, as part of the ANSER Center, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Award No. DE-SC0001059.
PY - 2012/3/12
Y1 - 2012/3/12
N2 - We introduce a method to monitor photoinduced charge separation processes in organic donor-acceptor heterostructures. This approach utilizes a transient Stark shift of the exciton band of a molecular J-aggregate, deposited as a thin probe layer adjacent to the organic heterojunction. The high temporal dynamic range of this approach, from 100 femtoseconds to nanoseconds and longer, enables the entire charge separation process to be followed in both space and time. More broadly, this method can be applied to characterize photoinduced charge injection and separation processes in different materials and architectures, where sub-picosecond time resolution is needed at high spatial resolution.
AB - We introduce a method to monitor photoinduced charge separation processes in organic donor-acceptor heterostructures. This approach utilizes a transient Stark shift of the exciton band of a molecular J-aggregate, deposited as a thin probe layer adjacent to the organic heterojunction. The high temporal dynamic range of this approach, from 100 femtoseconds to nanoseconds and longer, enables the entire charge separation process to be followed in both space and time. More broadly, this method can be applied to characterize photoinduced charge injection and separation processes in different materials and architectures, where sub-picosecond time resolution is needed at high spatial resolution.
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U2 - 10.1063/1.3694287
DO - 10.1063/1.3694287
M3 - Article
AN - SCOPUS:84859977202
VL - 100
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 11
M1 - 113304
ER -