Band-Gap Narrowing and Electric Transport Regulation of Hybrid Perovskites via Pressure Engineering
Inorganic Chemistry,
Год журнала:
2024,
Номер
63(24), С. 11431 - 11437
Опубликована: Май 30, 2024
Lead-free
organic–inorganic
hybrid
perovskites
are
one
class
of
promising
optoelectronic
materials
that
have
attracted
much
attention
due
to
their
outstanding
stability
and
environmentally
friendly
nature.
However,
the
intrinsic
band
gap
far
from
Shockley–Queisser
limit
inferior
electrical
properties
largely
applicability.
Here,
a
considerable
band-gap
narrowing
2.43
1.64
eV
with
compression
rate
up
32.5%
is
achieved
via
high-pressure
engineering
in
lead-free
perovskite
MA3Sb2I9.
Meanwhile,
electric
transport
process
changes
initial
interaction
both
ions
electrons
only
contribution
upon
compression.
The
alteration
characteristics
ascribed
vibration
limitation
organic
enhanced
orbital
overlap,
resulting
reduction
Sb–I
bond
length
through
pressure-induced
phase
transitions.
This
work
not
systematically
investigates
correlation
between
structural
MA3Sb2I9
but
also
provides
potential
pathway
for
optimizing
perovskites.
Язык: Английский
Pressure‐Induced Excitation‐Dependent Emission Color Tuning and Enhancement in 1D Zigzag Edge‐Sharing Perovskites (C6H10N2)PbX4 (X = Br, Cl)
Advanced Optical Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 29, 2024
Abstract
1D
zigzag
edge‐sharing
perovskites
have
generated
intense
research
interest
due
to
their
unique
structures
and
optoelectronic
properties.
Recent
efforts
focused
on
refining
these
enhance
efficiency
across
various
applications.
Herein,
high‐pressure
is
utilized
modulate
the
properties
of
two
Pb‐based
perovskites,
(AMP)PbCl
4
(AMP)PbBr
(where
AMP
2+
=
C
6
H
10
N
2
),
characterized
by
[PbX
]
2−
∞
chains
linked
through
hydrogen
bonding.
An
inverse
excitation‐dependent
emission
phenomenon
enhancement
are
observed
in
attributed
contraction
inhomogeneously
coordinated
4−
octahedra.
Pressure‐induced
lattice
promotes
overlap
Pb
X
orbitals,
resulting
a
decrease
bandgap.
Concurrently,
pressure‐induced
phase
transitions,
distortion
octahedra,
lead
discontinuous
decreases
These
optical
structural
explorations
facilitate
systematic
design
halide
with
desired
characteristics.
Язык: Английский
Pressure-Induced Changes in the Phase Distribution and Carrier Dynamics of Quasi-Two-Dimensional Ruddlesden–Popper Perovskites
Hai Hu,
Guangming Niu,
Jutao Jiang
и другие.
The Journal of Physical Chemistry Letters,
Год журнала:
2024,
Номер
15(32), С. 8142 - 8150
Опубликована: Авг. 2, 2024
Quasi-two-dimensional
(quasi-2D)
perovskites
hold
significant
potential
for
diverse
design
strategies
due
to
their
tunable
structures,
exceptional
optical
properties,
and
environmental
stability.
Due
the
complexity
of
structure
carrier
dynamics,
characterization
methods
such
as
photoluminescence
absorption
spectroscopy
can
observe
but
cannot
precisely
distinguish
or
identify
phase
distribution
within
quasi-2D
perovskite
films
correlate
phases
with
dynamics.
In
this
study,
we
used
pressure
modulate
intralayer
interlayer
structures
(PEA)
Язык: Английский