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@ARTICLE{RodrguezMartnez:1006768,
author = {Rodríguez-Martínez, Xabier and Hartnagel, Paula and
Riera-Galindo, Sergi and Beket, Gulzada and Österberg,
Thomas and Gao, Feng and Kirchartz, Thomas and Inganäs,
Olle},
title = {{A}ir {P}rocessing of {T}hick and {S}emitransparent
{L}aminated {P}olymer:{N}on‐{F}ullerene {A}cceptor
{B}lends {I}ntroduces {A}symmetric {C}urrent–{V}oltage
{C}haracteristics},
journal = {Advanced functional materials},
volume = {33},
number = {27},
issn = {1616-301X},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2023-01826},
pages = {2301192},
year = {2023},
abstract = {Non-fullerene acceptors have recently revolutionized indoor
organic photovoltaics (OPVs) with power conversion
efficiencies exceeding $30\%$ in laboratory scale.
Nevertheless, transferring their superior performance to
larger-scale prototyping, i.e., air-processing via
roll-to-roll compatible techniques, still shows severe
challenges. Herein, the industrial potential of the
PM6:IO4Cl blend, which is one of the most successful indoor
OPV photoactive layers (PALs), is thoroughly investigated.
The corresponding thick and semitransparent laminated
devices are fabricated entirely in air, by blade and
slot-die coating. Their current–voltage (J–V)
characteristics show anomalous features depending on the
illumination side, with the cathode side generally
outperforming the anode counterpart. Electrical and optical
modeling reveal that a plausible cause of such a phenomenon
is a dead layer that forms at the PAL/anode contact
interface that does not contribute to the photocurrent. Said
layer becomes undetectable when the PALs are made thin
enough (<35 nm each) leading to symmetric J–V curves and
improved light utilization efficiency. By screening the
photovoltaic performance of multiple donor:acceptor blends,
certain all-polymer and polymer:fullerene PALs are
identified as adequately symmetric candidates for thick
device up-scaling. Finally, ternary blends based on
PM6:IO4Cl:fullerene may constitute a viable route to
mitigate the electrical asymmetry detected on conventional
binary blends.},
cin = {IEK-5},
ddc = {530},
cid = {I:(DE-Juel1)IEK-5-20101013},
pnm = {1212 - Materials and Interfaces (POF4-121) / 1215 -
Simulations, Theory, Optics, and Analytics (STOA)
(POF4-121)},
pid = {G:(DE-HGF)POF4-1212 / G:(DE-HGF)POF4-1215},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000952708500001},
doi = {10.1002/adfm.202301192},
url = {https://juser.fz-juelich.de/record/1006768},
}