Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 26, 2024
Abstract
Chiral
organic
small
molecules
are
promising
for
circularly
polarized
light
(CPL)
detection
due
to
their
easy
modifiability,
strong
intermolecular
interactions,
and
straightforward
manipulation
of
the
transition
dipole
moments.
However,
they
often
exhibit
a
low
absorption
asymmetry
factor
(
g
abs
)
since
magnetic
moment
m
is
overshadowed
by
electric
μ
),
alignment
θ
not
optimized,
limiting
performance
CPL
photodetectors.
This
study
introduces
an
ortho
‐substitution
strategy
significantly
enhance
in
chiral
perylene
diimides
(PDIs)
tuning
crystal
packing
motif.
Incorporating
cyano
group
at
ortho‐position
markedly
reduces
angle
between
within
crystal,
thus
amplifying
.
The
fabricated
single‐crystal
film
devices
R
)‐4CN‐PDI‐Ph
demonstrated
superior
photodetecting
performance,
with
photocurrent
ph
0.362
—
three
times
larger
than
that
its
counterpart
)‐4PH‐PDI‐Ph.
These
findings
underscore
pivotal
role
molecular
stacking,
enhancing
detection,
deepening
understanding
structure‐performance
relationship
optoelectronics.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(51), P. 34962 - 34970
Published: Dec. 11, 2024
Chiral
organic-inorganic
hybrid
perovskite
nanocrystals
have
gained
attention
as
promising
materials
for
circularly
polarized
luminescence
emission,
owing
to
their
high
photoluminescence
efficiency
and
superior
charge-carrier
mobility.
However,
achieving
electroluminescence
(CPEL)
from
mixed-phase
remains
a
significant
challenge.
We
present
bichiral
formamidinium
lead
bromide
(FAPbBr
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
17(1)
Published: Nov. 15, 2024
Abstract
Flexible
wearable
optoelectronic
devices
fabricated
from
organic–inorganic
hybrid
perovskites
significantly
accelerate
the
development
of
portable
energy,
biomedicine,
and
sensing
fields,
but
their
poor
thermal
stability
hinders
further
applications.
Conversely,
all-inorganic
possess
excellent
stability,
black-phase
perovskite
film
usually
requires
high-temperature
annealing
steps,
which
increases
energy
consumption
is
not
conducive
to
fabrication
flexible
devices.
In
this
work,
an
unprecedented
low-temperature
stable
CsPbI
3
films
demonstrated
by
in
situ
hydrolysis
reaction
diphenylphosphinic
chloride
additive.
The
released
diphenyl
phosphate
ions
during
lower
phase
transition
temperature
effectively
passivate
defects
films,
yielding
high-performance
photodetectors
with
a
responsivity
42.1
A
W
−1
detectivity
1.3
×
10
14
Jones.
Furthermore,
high-fidelity
image
photoplethysmography
sensors
are
based
on
photodetectors.
This
work
provides
new
perspective
for
large-area
ACS Omega,
Journal Year:
2024,
Volume and Issue:
9(49), P. 48374 - 48389
Published: Nov. 27, 2024
Herein,
quasi-two-dimensional
(Q-2D)
(PEA)2MA4Pb5I16
(prepared
by
a
two-step
process)
and
hole
transport
layer
of
solar
cell
were
fabricated
in
high
relative
humidity
(25
±
5%)
environment.
The
PSC
behavior
most
Q-2D
perovskites
is
worse
than
that
three-dimensional
owing
to
the
horizontal
alignment
innate
characteristic
organic
plates
on
substrate.
Using
hybrid
immersion
solvents
(HISs),
we
have
improved
vertical
an
appropriate
ratio
enhance
efficiency
charge
transfer
coverage
first
priming
(first
step).
grazing
incidence
X-ray
diffraction
pattern
optimized
structures
revealed
preferential
orientation
for
(111),
which
PSCs
micrometer-level
grain
size
growth.
second
step
was
processed
high-humidity
environment
(50
(methylammonium
iodide
solution
embedded),
demonstrated
distinct
boundaries.
power
conversion
(PCE,
13.09%)
champion
device
prepared
using
HIS
system
increased
>55%
compared
single-immersion
solvent
(8.3%).
PCE
ion-modified
ETL
16.02%
(CsF-3)
14.58%
(CsCl-3)
22
11%
improvement,
respectively.
electron
(ETL)
deposited
air,
reduced
consumption
preparing
perovskite
cells
(PSCs).
Finally,
all
stored
three
(DMF/DMSO,
CsF-3,
CsCl-3)
exhibited
long-term
stability
1
month
maintaining
80–88%
PCE,
demonstrating
importance
improve
growth
orientation,
enhances
photovoltaic
properties
PSCs.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 26, 2024
Abstract
Chiral
organic
small
molecules
are
promising
for
circularly
polarized
light
(CPL)
detection
due
to
their
easy
modifiability,
strong
intermolecular
interactions,
and
straightforward
manipulation
of
the
transition
dipole
moments.
However,
they
often
exhibit
a
low
absorption
asymmetry
factor
(
g
abs
)
since
magnetic
moment
m
is
overshadowed
by
electric
μ
),
alignment
θ
not
optimized,
limiting
performance
CPL
photodetectors.
This
study
introduces
an
ortho
‐substitution
strategy
significantly
enhance
in
chiral
perylene
diimides
(PDIs)
tuning
crystal
packing
motif.
Incorporating
cyano
group
at
ortho‐position
markedly
reduces
angle
between
within
crystal,
thus
amplifying
.
The
fabricated
single‐crystal
film
devices
R
)‐4CN‐PDI‐Ph
demonstrated
superior
photodetecting
performance,
with
photocurrent
ph
0.362
—
three
times
larger
than
that
its
counterpart
)‐4PH‐PDI‐Ph.
These
findings
underscore
pivotal
role
molecular
stacking,
enhancing
detection,
deepening
understanding
structure‐performance
relationship
optoelectronics.
