Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 16, 2024
Abstract
Lead
halide
perovskite
nanocrystals
(NCs)
rapidly
emerge
as
promising
materials
for
photovoltaics.
However,
to
fully
harness
their
potential,
efficient
charge
extraction
is
crucial.
Despite
rapid
advancements,
the
specific
active
sites
where
acceptor
molecules
interact
remain
inadequately
understood.
Surface
chemistry
and
interfacial
properties
are
pivotal,
they
directly
impact
transfer
efficiency
overall
device
performance.
This
study
identifies
maps
binding
hole
transporters,
examining
influence
on
dynamics
through
ligand
engineering
with
2,3‐dimercaptopropanol
(DMP),
a
compound
strong
affinity
lead
(Pb).
DMP
effectively
passivates
Pb
in
CsPbBr
3
(CPB)
NCs,
enhancing
photoluminescence
(PL)
by
forming
stable
chelating
bonds.
DMP‐modified
CPB
nearly
completely
suppresses
─COOH‐functionalized
ferrocene
(FcA)
partially
─NMe
2
‐functionalized
(FcAm),
suggesting
an
alternative
pathway
FcAm.
further
supported
enhanced
bromine‐excess
(CPB‐Br(XS))
synthesized
via
SOBr
treatment.
The
distinct
interactions
validated
steady‐state
time‐resolved
PL,
along
transient
absorption
spectroscopy.
These
findings
underscore
role
of
strategic
NC‐charge
interactions,
enabling
better
extraction,
higher
solar
cell
efficiency,
reduced
toxicity
binding.
Nanomaterials,
Journal Year:
2024,
Volume and Issue:
14(14), P. 1201 - 1201
Published: July 15, 2024
The
ligand
engineering
of
inorganic
lead
halide
perovskite
quantum
dots
(PQDs)
is
an
indispensable
strategy
to
boost
their
photoluminescence
stability,
which
pivotal
for
optoelectronics
applications.
CsPbX
ACS Applied Optical Materials,
Journal Year:
2024,
Volume and Issue:
2(2), P. 301 - 312
Published: Feb. 12, 2024
Due
to
narrow
emission
peaks,
high
absorption
cross
section,
and
exciton
binding
energies,
CsPbX3
perovskite-based
nonlinear
optical
(NLO)
materials
are
promising
for
next-generation
quantum
photonic
technologies.
Herein,
we
report
dimension
thickness
control
synthesis
of
strongly
confined
cesium
lead
iodide
perovskite
materials,
which
exhibit
excellent
two-photon
(TPA)
properties.
Our
finding
reveals
that
the
red-emissive
zero-dimensional
(0D)
Cs4PbI6
nanocrystals
(NCs),
one-dimensional
(1D)
CsPbI3
nanowires
(NWs),
two-dimensional
(2D)
nanoplatelets
(NPLs)
can
be
controlled
by
varying
temperature.
Moreover,
NPLs
with
different
thicknesses
obtained
ratio
Pb–I
precursor
Cs–oleate.
Furthermore,
exhibits
a
very
section
(σ2
∼
12.8
×
106
GM),
is
several
orders
magnitude
higher
than
sections
reported
organic
chromophores
(>100
GM).
Interestingly,
experimentally
σ2
0D
an
order
3D
NCs
varies
dimensions
in
following
order:
>
1D
NWs
2D
NPL
CsPbI3.
Although
observed
σ1
variations
correlate
volume
perovskites,
does
not
material.
Notably,
volume-normalized
(VN)
highest
1.6
nm
thickness,
it
decreases
increase
NPLs,
due
confinement
effect.
Overall,
this
work
provides
how
dimension,
volume,
engineering
used
design
TPA
material
possible
device
applications.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 30, 2024
Abstract
The
photocatalytic
reduction
of
CO
2
into
valuable
chemicals
and
fuels
has
become
a
significant
research
focus
in
recent
years
due
to
its
environmental
sustainability
energy
efficiency.
Metal
halide
perovskites
(MHPs),
renowned
for
their
remarkable
optoelectronic
properties
tunable
structures,
are
regarded
as
promising
photocatalysts.
Yet,
practical
uses
constrained
by
inherent
instability,
severe
electron–hole
recombination,
scarcity
active
sites,
prompting
substantial
efforts
optimize
MHP‐based
This
review
summarizes
the
latest
advancements
photocatalysis.
First
fundamental
principles
photocatalysis
outlined
structural
optical
characteristics
MHPs
evaluated.
Then
key
strategies
enhancing
MHP
photocatalysts,
including
morphology
surface
modification,
encapsulation,
metal
cation
doping,
heterojunction
engineering,
molecular
immobilization
highlighted.
Finally,
considering
progress
needs
industrial
application,
challenges
future
prospects
explored.
aims
support
researchers
development
more
efficient
stable
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 16, 2024
Abstract
Lead
halide
perovskite
nanocrystals
(NCs)
rapidly
emerge
as
promising
materials
for
photovoltaics.
However,
to
fully
harness
their
potential,
efficient
charge
extraction
is
crucial.
Despite
rapid
advancements,
the
specific
active
sites
where
acceptor
molecules
interact
remain
inadequately
understood.
Surface
chemistry
and
interfacial
properties
are
pivotal,
they
directly
impact
transfer
efficiency
overall
device
performance.
This
study
identifies
maps
binding
hole
transporters,
examining
influence
on
dynamics
through
ligand
engineering
with
2,3‐dimercaptopropanol
(DMP),
a
compound
strong
affinity
lead
(Pb).
DMP
effectively
passivates
Pb
in
CsPbBr
3
(CPB)
NCs,
enhancing
photoluminescence
(PL)
by
forming
stable
chelating
bonds.
DMP‐modified
CPB
nearly
completely
suppresses
─COOH‐functionalized
ferrocene
(FcA)
partially
─NMe
2
‐functionalized
(FcAm),
suggesting
an
alternative
pathway
FcAm.
further
supported
enhanced
bromine‐excess
(CPB‐Br(XS))
synthesized
via
SOBr
treatment.
The
distinct
interactions
validated
steady‐state
time‐resolved
PL,
along
transient
absorption
spectroscopy.
These
findings
underscore
role
of
strategic
NC‐charge
interactions,
enabling
better
extraction,
higher
solar
cell
efficiency,
reduced
toxicity
binding.
