ACS Photonics,
Год журнала:
2024,
Номер
12(1), С. 128 - 139
Опубликована: Дек. 27, 2024
The
guanidine
compound
has
recently
been
demonstrated
to
be
effective
in
passivating
interface
defects
and
enhancing
the
performance
stability
of
perovskite
photodetectors
(PPDs).
However,
selection
utilization
these
compounds
are
conducted
without
comprehensive
guidance
due
an
insufficient
understanding
mechanisms
functions
their
functional
groups.
Herein,
we
evaluated
defect
passivation
capabilities
acid
(Gua)
by
analyzing
its
electrostatic
potential
molecular
orbitals
then
applied
it
at
all-inorganic
SnO2
films.
smoother
morphology,
larger
crystal,
improved
optoelectronic
properties
Gua-modified
films
suppressing
Gua.
Moreover,
systematic
experiment
calculation
analyses
have
revealed
that
–C═NH
group,
with
a
higher
electron
cloud
density,
not
only
plays
dominant
role
healing
oxygen
vacancies,
free
hydroxyl
groups,
Sn-related
on
surface
but
also
passivates
Pb2+
X–
interface.
Consequently,
PPDs
achieve
exceptional
detectivity
1.32
×
1013
Jones,
responsivity
0.30
A/W,
minimal
dark
current
1.55
10–9
A/cm2.
This
work
provided
valuable
insights
for
customizing
Lewis
base
molecules
crucial
groups
universal
strategy
estimate
select
organic
photoelectronic
devices.
Energies,
Год журнала:
2024,
Номер
17(11), С. 2671 - 2671
Опубликована: Май 31, 2024
In
recent
years,
all-inorganic
perovskite
solar
cells
have
become
a
research
hotspot
in
the
field
of
photovoltaics
due
to
their
excellent
stability
and
optoelectronic
performance,
power
conversion
efficiency
has
increased
from
initial
2.9%
over
20%.
This
article
briefly
introduces
development
cesium
lead-based
(CsPbX3-IPSC),
including
characteristics
CsPbX3
materials,
preparation
methods,
structure
working
principle
IPSCs.
Different
optimization
strategies
for
preparing
high
performance
high-stability
IPSCs,
such
as
element
doping
interface
modification,
are
discussed.
The
application
prospects
IPSCs
also
summarized.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 9, 2025
The
numerous
defects
in
inorganic
perovskites
and
inferior
buried
interfaces
result
serious
nonradiative
recombination
energy
loss,
exacerbating
the
deterioration
of
performance
perovskite
solar
cells.
Here,
we
develop
a
facile
strategy
to
simultaneously
improve
CsPbIBr2
quality
by
regulating
crystallization
modify
interface
forming
6-aminonicotinic
acid
(6AA)
molecular
interlayer
through
adding
6AA
into
precursor
solution.
It
is
found
that
effectively
regulates
process
because
molecules
exhibit
strong
intermolecular
interaction
with
components,
resulting
compact
film
improved
morphology
decreased
defects.
Meanwhile,
are
pushed
downward
during
accumulate
at
form
interlayer,
which
improves
contact
enhances
charge
transport
interface.
improvement
modification
decrease
loss.
Consequently,
fabricated
planar
carbon-based
cell
demonstrates
an
efficiency
10.97%
remarkably
promoted
long-term
stability.
Acta Physica Sinica,
Год журнала:
2025,
Номер
74(12), С. 0 - 0
Опубликована: Янв. 1, 2025
Inorganic
CsPbIBr<sub>2</sub>
perovskite
features
high
phase
stability
and
light
absorption
coefficient,
making
it
suitable
for
the
development
of
tandem
cells
or
semi-transparent
cells.
High-quality
films
are
crucial
importance
fabricating
efficient
solar
However,
in
comparison
with
CsPbI<sub>3</sub>
CsPbI<sub>2</sub>Br,
precursor
has
poor
crystallinity
low
film
coverage,
which
is
prone
to
generating
pinholes
defects.
Therefore,
serious
charge
recombination
often
occurs
inside
devices.
To
address
this
problem,
p-aminobenzoic
acid
(PABA)
added
regulate
its
crystallization
dynamics
work.
Electrostatic
potential
distribution
PABA
shows
that
electron-rich
regions
(negative
regions)
mainly
located
near
C=O.
Fourier
transform
infrared
spectroscopy
indicates
existence
coordination
interaction
between
C=O
Pb<sup>2+</sup>
formation
hydrogen
bonds
-NH<sub>2</sub>
halide
anions.
Ultraviolet-visible
(UV-Vis)
X-ray
diffraction
(XRD)
spectra
demonstrate
a
new
intermediate
phase,
PABA·Pb…Br(I),
formed
molecules
components
precursor.
The
slows
down
rate
perovskite,
regulates
grain
growth,
enables
preparation
dense
films.
XRD,
UV-Vis,
space
limited
current,
linear
sweep
voltammetry
employed
characterize
quality.
After
addition
PABA,
quality
improved.
Thus,
enhanced.
defect
density
reduced.
And
conductivity
increased.
efficiency
champion
cell
increases
10.65%
compared
control
(8.76%).
Further,
dark
current-voltage
curves,
Mott-Schottky
electrochemical
impedance
spectra,
photoluminescence
utilized
analyze
reasons
improved
photovoltaic
performance.
device
exhibits
reduced
leakage
enhanced
built-in
electric
field,
suppressed
recombination,
extraction
at
interface.
In
enhancement
efficiency,
PABA-regulated
also
exhibit
stability.
being
stored
air
1500
h,
average
unencapsulated
remains
80%
initial
value.
ACS Applied Materials & Interfaces,
Год журнала:
2025,
Номер
unknown
Опубликована: Июнь 2, 2025
Inorganic
CsPbX3
perovskite
solar
cells
have
made
great
progress
over
the
past
several
years.
Nevertheless,
vulnerable
surface
of
deteriorates
device
stability
and
impedes
further
development
performance.
Herein,
a
reconstruction
method
is
proposed
to
in
situ
construct
0D
Cs4PbI1.5Br4.5
capping
layer
on
top
3D
CsPbI1.5Br1.5
for
simultaneously
decreasing
defects
promoting
perovskite.
It
found
that
constructing
atop
not
only
remarkably
enhances
but
also
creates
favorable
energy
level
interface
charge
separation.
In
addition,
this
process
causes
secondary
crystallization
perovskite,
improving
quality.
These
features
result
remarkable
reduction
nonradiative
recombination.
As
result,
carbon-based
exhibits
promoted
performance
with
power
conversion
efficiency
up
12.93%.
cell
without
any
encapsulation
maintains
∼94%
original
after
1080
h
aging
under
an
ambient
environment.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(42), С. 57412 - 57420
Опубликована: Окт. 10, 2024
The
large
voltage
loss
(Vloss)
mainly
stems
from
the
mismatch
between
perovskite
film
and
electron
transport
layer
in
CsPbI2Br-based
all-inorganic
solar
cells
(I-PSCs),
which
restricts
power
conversion
efficiency
(PCE)
of
devices.
To
address
this
issue,
potassium
benzoate
(BAP)
is
first
introduced
as
a
bifunctional
passivation
material
to
regulate
TiO2/CsPbI2Br
interface,
reduce
Vloss,
improve
photovoltaic
performance
I-PSCs.
Eventually,
champion
PCE
I-PSCs
without
hole
modified
by
BAP
(Target-PSCs)
improves
14.90%
12.14%
reference
PSCs.
open-circuit
(Voc)
increases
1.27
V
initial
1.14
after
modification.
A
series
characterizations
show
that
modification
can
not
only
optimize
energy
level
alignment
but
also
passivize
surface
defects
caused
uncoordinated
Cs+/Pb2+.
Moreover,
Target-PSCs
encapsulation
demonstrate
better
thermal
stability,
maintain
107.6%
original
annealing
at
160
°C
for
140
min
humid
air.
While
PSCs
76.5%
their
same
process.
This
work
provides
simple
strategy
modify
buried
interface
