Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 17, 2024
Abstract
Given
the
extensive
application
of
near‐infrared
(NIR)
emission,
quest
for
efficient
and
versatile
NIR
semiconductors
have
attracted
tremendous
attention.
Leveraging
trivalent
rare
earth
(RE
3+
)
ions
doping,
integration
metal
halide
perovskites
with
RE
makes
it
easy
to
achieve
NIR‐II
emission
(1000–1700
nm).
However,
although
showing
promise
in
bioimaging,
optical
communication,
night
vision,
enhancing
intensity
promote
further
progress
real‐world
applications
remains
a
challenge.
This
review
summarizes
recent
advancements
ion‐doped
perovskite
semiconductors,
discusses
what
kind
properties
are
needed
how
desired
various
applications.
The
starts
synthesis
methods
material
types
rich
examples.
Following
this,
mechanisms
strategies
optimizing
luminescence
performance
discussed
detail.
Furthermore,
highlights
their
multifunctional
both
as
an
electrically
driven
emitter
light‐emitting
diodes
(LEDs)
down‐conversion
photovoltaic
devices
(PVs)
or
phosphor‐converted
LEDs
(pc‐LEDs).
Finally,
insights
on
fill
gap
between
current
research
future
goals
provided.
aims
provide
deeper
understanding
materials,
exploration
emitters.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(44)
Published: May 22, 2024
Abstract
The
double
perovskite
material
of
Cs
2
NaRECl
6
‐type,
utilizing
rare‐earth
(RE)
ions
as
trivalent
element,
has
attracted
widespread
interest
due
to
its
unique
optoelectronic
properties
and
wide
range
applications.
It
displays
rich
optical
properties,
including
visible
infrared
light
emission
through
down‐shifting,
well
up‐conversion
radiation‐induced
emission.
These
exceptional
make
it
a
promising
for
devices
such
detectors,
light‐emitting
diodes,
lasers
energy
storage
batteries
but
also
show
advantages
in
anti‐counterfeiting
technology
imaging.
In
this
article,
the
latest
progress
is
reported
challenges
crystal
structure,
preparation,
performance,
various
applications
lead‐free
halide
(HLDPs)
compounds.
This
outline
prospective
research
directions
existing
materials,
with
aim
facilitating
discovery
new
HLDPs
materials.
Chemistry of Materials,
Journal Year:
2024,
Volume and Issue:
36(5), P. 2483 - 2494
Published: Feb. 27, 2024
Lanthanide
(Ln3+)-doped
double
perovskites
to
achieve
near-infrared
(NIR)
emission
have
been
demonstrated
be
an
effective
strategy.
However,
these
emitters
generally
exhibit
low
efficiencies,
which
limits
further
applications.
Herein,
we
synthesized
Er3+-doped
Cs2NaYCl6
via
a
hydrothermal
reaction.
Steady-state
and
transient
fluorescence
spectra
show
that
there
is
pronounced
cross-relaxation
between
neighboring
Er3+,
thus
boosting
the
NIR
with
photoluminescence
quantum
efficiency
(PLQE)
of
93
±
2%
(NIR-II
region
∼87%).
Moreover,
ferromagnetic
coupling
can
enhance
absorption
intensity
Er3+;
thus,
strongest
witnessed
direct
excitation
at
520
nm.
The
remarkable
PLQE
ideal
wavelength
make
Cs2NaYCl6:Er3+
candidate
for
next
generation
light
sources.
In
addition,
Nd3+
Yb3+
were
also
doped
in
successfully,
their
respective
values
are
51
3%
30
2%,
respectively.
Particularly,
Ln3+-doped
440
K
maintain
103%
(Er3+),
91%
(Nd3+),
112%
(Yb3+)
initial
300
K.
Their
admirable
properties
enable
us
demonstrate
application
as-synthesized
compounds
night
vision
nondestructive
testing.
Therefore,
our
findings
one
most
promising
emitters.
Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
12(30)
Published: Aug. 13, 2024
Abstract
Recently,
all‐inorganic
halide
double
perovskites
(DPs)
with
a
chemical
formula
of
Cs
2
B
I
III
X
6
have
been
emerging
as
shinning
star
to
be
used
in
modern
optoelectronic
devices,
due
their
unique
advantages
such
environmentally
friendly,
high
absorption
coefficient,
low
trap
densities,
tunable
bandgap,
variable
constituent
elements
and
valences
states
through
or
sites
engineering.
In
this
review,
first,
the
impact
cation
doping
on
electronic
structure
optical
properties
DPs
are
systematically
overviewed,
which
cover
several
key
issues
including
interconversion
between
direct
indirect
band
gaps,
enhancement
light
absorption,
promotion
exciton
localization,
elucidation
energy
transfer
mechanisms,
regulation
defect
density
improvement
both
stability
luminescence
efficiency.
Subsequently,
state‐of‐the‐art
research
activities
regarding
interesting
device
applications
discussed,
light‐emitting
diodes,
anticounterfeiting
encryption,
X‐ray
scintillators,
thermometry.
Finally,
existing
difficulties,
prospects,
directions
field
proposed.
Abstract
Trivalent
lanthanide
(Ln
3+
)
ions
with
ladderlike
4f
energy
levels,
as
dopants,
can
endow
luminescent
matrix
more
diverse
optoelectronic
properties,
and
a
wider
application.
However,
their
intensity
is
usually
limited
by
the
parity
forbidden
transition
rule
level
mismatch
between
host
dopant.
Herein,
Ln
doped
Cs
2
Na
1‐x
K
x
Y
0.97
Sb
0.03
Cl
6
nanocrystals
(NCs)
are
prepared,
photoluminescence
quantum
yields
of
all
samples
visible
near‐infrared
emissions
have
surprisingly
reached
over
50%,
therein,
value
Tb
0.6
0.4
NCs
dramatically
up
to
83.3%,
which
new
breakthrough
in
field
lead‐free
perovskite
NCs.
From
first
principles
calculations,
crystal
structure,
spectroscopic
analysis,
this
benefits
from
synergistic
effect
deformation
levels
provided
doping
environment
distortion
induced
+
doping.
That
is,
localized
causes
splitting
ions,
resulting
effective
transfer
efficiency
simultaneously
introducing
opposite
odd
parity,
breaking
rule,
promoting
luminescence
ions.
This
work
will
open
route
develop
efficient
materials.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 10, 2025
Abstract
Recently,
lead‐free
double
perovskites
have
gained
much
attention
for
their
superior
optoelectronic
properties.
However,
realizing
efficient
white
light
and
near‐infrared
(NIR)
emission,
as
well
bright
radioluminescence
(RL)
in
a
single
compound
has
not
yet
been
reported.
Herein,
Bi
3+
/Mo
4+
‐codoped
Cs
2
Ag
0.6
Na
0.4
InCl
6
perovskite
is
synthesized
by
hydrothermal
reaction.
Under
photoexcitation,
the
codoped
exhibits
highly
broadband
warm‐white
emission
(610
nm)
NIR
(930
nm),
which
can
be
attributed
to
self‐trapped
exciton
of
d–d
transition
Mo
,
respectively.
Interestingly,
also
emits
strong
with
yield
25100
photons
per
MeV
under
X‐ray
irradiation.
Based
on
/PDMS
flexible
film,
its
applications
emitting
diodes
(WLED),
source,
scintillator
are
demonstrated,
respectively,
all
exhibit
remarkable
Finally,
as‐fabricated
devices
light,
NIR,
imaging
further
demonstrated
pixel‐level
image
fusion
realized
without
pixel
mismatch
complex
processing.
Therefore,
internal
information
capsule
wrapped
centrifuge
tube
iron
wire
successfully
through
fusion.
Advanced Materials Technologies,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 9, 2025
Abstract
Lead‐free
double
perovskites
(LFDP)
have
attracted
considerable
attention
due
to
their
remarkable
optoelectronic
characteristics,
which
include
tunable
bandgaps
spanning
the
entire
visible
spectrum,
high
photoluminescence
quantum
yields
(PLQY),
and
wide
emission
bandwidths.
The
incorporation
of
transition
metal
ions
into
lead‐free
perovskites,
as
an
efficient
method
for
tailoring
optical
properties,
is
crucial
both
foundational
research
practical
applications
in
devices
such
light‐emitting
diodes
(LEDs),
anti‐counterfeiting,
temperature
sensors,
X‐ray
scintillators.
In
this
review,
recent
progress
design
ion‐doped
summarized,
briefly
introduce
strategies
effective
doping
several
representative
perovskites.
manipulation
properties
through
ion
doping,
focusing
on
enhanced
stability,
increased
luminescent
efficiency,
tuning
bands,
luminescence
lifetimes
are
highlighted.
conclusion,
challenges
perspectives
dynamic
area
addressed.
