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@ARTICLE{Wang:1037870,
author = {Wang, Rong and Han, Leng and Li, Ning and Chochos, Christos
L. and Gregoriou, Vasilis G. and Lüer, Larry and Brabec,
Christoph},
title = {{R}educing {V}oltage {L}osses in {O}rganic {P}hotovoltaics
{R}equires {I}nterfacial {D}isorder {M}anagement},
journal = {Advanced energy materials},
volume = {14},
number = {26},
issn = {1614-6832},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2025-01013},
pages = {2400609},
year = {2024},
abstract = {Thanks to the introduction of non-fullerene acceptors,
efficiencies of organic photovoltaics are now approaching
$20\%.$ Closing the gap with inorganic photovoltaics
requires minimizing voltage losses without penalizing charge
extraction, for which microstructure control is crucial.
However, the complex interplay between microstructure and
charge generation, recombination, and extraction has so far
not been unraveled. Here, a systematic study linking device
performance to distinct microstructural features via machine
learning is presented. Building bi-layer devices allows to
separately study the influence of aggregation and disorder
on the energies and lifetimes of bulk and interfacial
states. Unambiguous assignments of specific structural
motifs to the device photophysics are thus possible. It is
found that the control of aggregation-caused quenching is
decisive for the exciton splitting efficiency and thus the
carrier generation. Furthermore, the static disorder at the
donor–acceptor interface controls the nonradiative
recombination by shifting the excited state population from
the bulk toward the interface. Finally, the amount of
disorder in the bulk is found decisive for charge
extraction. The finding that charge generation,
recombination, and extraction are controlled by distinct
structural features, is the key to optimizing these motifs
independently, which will pave the way for organic
photovoltaics toward the detailed balance limit.},
cin = {IET-2},
ddc = {050},
cid = {I:(DE-Juel1)IET-2-20140314},
pnm = {1212 - Materials and Interfaces (POF4-121)},
pid = {G:(DE-HGF)POF4-1212},
typ = {PUB:(DE-HGF)16},
UT = {WOS:001207989700001},
doi = {10.1002/aenm.202400609},
url = {https://juser.fz-juelich.de/record/1037870},
}