ACS Applied Polymer Materials,
Journal Year:
2023,
Volume and Issue:
6(1), P. 986 - 996
Published: Dec. 19, 2023
The
single-chain
conformations
and
aggregated
structures
of
conjugated
polymers
in
precursor
solutions
affect
the
morphology
films
their
photoelectric
properties.
Dynamic/static
light
scattering,
small-angle
neutron
high-resolution
transmission
electron
microscopy,
selected
area
diffraction
were
employed
to
elucidate
efficient
donor
(PBDT-TTz
D18-Cl)
chloroform
(CF,
nonaromatic
solvent)
chlorobenzene
(CB,
aromatic
for
a
range
concentrations
(0.03–5.0
mg/mL).
D18-Cl
presented
more
rigid
extended
chain
conformation
dilute
CF
solution.
However,
relatively
flexible
PBDT-TTz
easily
formed
π–π
interaction
with
CB
molecules,
thereby
extending
main
chain's
conjugation
length.
Regulation
solution
resulted
formation
compact,
ordered
structure
at
increased
concentrations.
In
liquid–solid
cross-phase
transfer
process,
effectively
inherited
by
subsequent
films.
From
concentrated
solutions,
multistage
self-assembled
directly
affected
solid-state
packing
properties
resulting
Through
regulation
aggregation
solution,
hole
mobilities
nearly
an
order
magnitude,
power
conversion
efficiency
solar
cells
was
enhanced
28.8%.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 16, 2025
Abstract
The
electronic
transport
layer
(ETL)
based
on
perylene‐diimide
(PDI)
has
been
widely
demonstrated
for
efficient
organic
solar
cells
(OSCs).
However,
the
effect
of
ETL
materials
interfacial
traps
and
energy
losses
remains
understudied.
This
study
investigates
effects
dipole
distance
PDINN
interface
defects
using
three
specifically
designed
weak
acidic
with
varying
carboxyl
hydroxyl
group
amounts.
Among
these,
3,5‐dihydroxybenzoic
acid
(2OH),
moderate
pH
high
distance,
enhanced
intermolecular
forces
PDINN.
interaction
boosted
π–π
stacking,
ohmic
contact
active
Ag
electrode.
P‐2OH
film
exhibited
a
higher
more
uniform
potential
distribution,
suppressing
charge
recombination
at
interface,
reducing
trap
density
to
2.12
×
10
16
cm
3
,
non‐radiative
loss
∆E
from
0.236
0.174
eV.
Consequently,
decreased
0.553
0.484
meV
PM6:
BTP‐ec9/P‐2OH
device.
Notably,
decent
PCE
19.1%
is
achieved
(10
nm),
it
impressively
power
conversion
efficiency
(PCE)
16.4%
when
thickness
up
50
nm.
work
underscores
importance
groups
in
regulating
minimize
offers
insights
developing
thickness‐insensitive
interlayers
high‐performance
OSCs.
Journal of Materials Chemistry C,
Journal Year:
2024,
Volume and Issue:
12(31), P. 12004 - 12014
Published: Jan. 1, 2024
The
intricate
relationship
between
the
blend
morphology
of
ternary
systems
and
organic
photovoltaic
(OPV)
performance
remains
incompletely
elucidated.
Our
demonstration
offers
a
deeper
understanding
how
nanophase
separation
governs
energy
loss
V
OC
OPVs.
ACS Applied Polymer Materials,
Journal Year:
2023,
Volume and Issue:
6(1), P. 986 - 996
Published: Dec. 19, 2023
The
single-chain
conformations
and
aggregated
structures
of
conjugated
polymers
in
precursor
solutions
affect
the
morphology
films
their
photoelectric
properties.
Dynamic/static
light
scattering,
small-angle
neutron
high-resolution
transmission
electron
microscopy,
selected
area
diffraction
were
employed
to
elucidate
efficient
donor
(PBDT-TTz
D18-Cl)
chloroform
(CF,
nonaromatic
solvent)
chlorobenzene
(CB,
aromatic
for
a
range
concentrations
(0.03–5.0
mg/mL).
D18-Cl
presented
more
rigid
extended
chain
conformation
dilute
CF
solution.
However,
relatively
flexible
PBDT-TTz
easily
formed
π–π
interaction
with
CB
molecules,
thereby
extending
main
chain's
conjugation
length.
Regulation
solution
resulted
formation
compact,
ordered
structure
at
increased
concentrations.
In
liquid–solid
cross-phase
transfer
process,
effectively
inherited
by
subsequent
films.
From
concentrated
solutions,
multistage
self-assembled
directly
affected
solid-state
packing
properties
resulting
Through
regulation
aggregation
solution,
hole
mobilities
nearly
an
order
magnitude,
power
conversion
efficiency
solar
cells
was
enhanced
28.8%.
