|Title:||Probing charge recombination dynamics in organic photovoltaic devices under open-circuit conditions|
|Authors :||Elliott, Lindsay C. C.|
Basham, James I.
Shrestha, Pragya R.
Richter, Lee J.
DeLongchamp, Dean M.
Gundlach, David J.
|Published in :||Advanced Energy Materials|
|Publisher / Ed. Institution :||Wiley|
|License (according to publishing contract) :||Licence according to publishing contract|
|Type of review:||Peer review (publication)|
|Subject (DDC) :||621.3: Electrical engineering and electronics|
|Abstract:||Large perturbation transient photovoltage and impedance spectroscopy measurements are used to gain insights into recombination in organic photovoltaic devices. The combination of these two simple optoelectronic techniques enables characterization of recombination order as well as mobile and trapped charge evolution over a large range of carrier densities. The data show that trapped charge is approximately equal to total charge at low carrier densities in the high efficiency devices measured. Between low and high charge carrier density, the order of recombination is observed to vary from monomolecular to bimolecular to higher order. The new techniques and methods presented can be applied to any type of photovoltage device to gain insight into device operation and limitations.|
|Departement:||School of Engineering|
|Organisational Unit:||Institute of Computational Physics (ICP)|
|Publication type:||Article in scientific journal|
|Appears in Collections:||Publikationen School of Engineering|
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