Advanced Optical Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 29, 2024
Abstract
Doping
lanthanide
ions
in
double
perovskites
(DPs)
offers
a
promising
approach
to
tailor
optical
and
optoelectronic
properties
for
versatile
applications.
However,
achieving
efficient
thermal
stable
DPs
remains
significant
challenge.
In
this
paper,
series
of
Cs
2
KInCl
6
:Yb
3+
,Er
with
negative
quenching
behavior
high
sensitivity
are
fabricated.
The
intrinsic
luminescence
studied
broad
self‐trapped
excitons
(STEs)
emission
peak
at
500
nm,
which
can
be
enhanced
by
doping
Er
accompanied
greater
distortion
the
[InCl
]
3−
octahedrons
as
well
multiple
characteristic
modes
under
ultraviolet
near‐infrared
excitation.
Notably,
addition
sensitizer
Yb
leads
up‐conversion
(up‐conversion
quantum
yield
up
1.66%),
anti‐thermal
performance
brought
phonon‐assisted
energy
transfer
process,
reproducibility
based
on
fluorescence
intensity
ratio
technology.
This
work
provides
an
effective
strategy
enhance
STEs
achieve
temperature
sensors
through
doping.
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.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 13, 2025
Abstract
Halide
perovskites
(HPs),
emerging
as
a
noteworthy
class
of
semiconductors,
hold
great
promise
for
an
array
optoelectronic
applications,
including
anti‐counterfeiting,
light‐emitting
diodes
(LEDs),
solar
cells
(SCs),
and
photodetectors,
primarily
due
to
their
large
absorption
cross
section,
high
fluorescence
efficiency,
tunable
emission
spectrum
within
the
visible
region,
tolerance
lattice
defects,
well
adaptability
solution‐based
fabrication
processes.
Unlike
luminescent
HPs
with
band‐edge
emission,
trivalent
rare‐earth
(RE)
ions
typically
emit
low‐energy
light
through
intra‐4f
optical
transitions,
characterized
by
narrow
spectra
long
lifetimes.
When
fused,
cooperative
interactions
between
REs
endow
resulting
binary
composites
not
only
properties
inherited
from
parent
materials
but
also
introduce
new
attributes
unattainable
either
component
alone.
This
review
begins
fundamental
characteristics
REs,
followed
particular
focus
on
impact
electronic
structures
associated
energy
transfer
The
advanced
synthesis
methods
utilized
prepare
HPs,
RE‐doped
compounds,
are
overviewed.
Furthermore,
potential
applications
summarized
across
diverse
domains,
high‐fidelity
anticounterfeiting,
bioimaging,
LEDs,
photovoltaics,
photodetection,
photocatalysis,
conclude
remaining
challenges
future
research
prospects.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(34), P. 22417 - 22441
Published: Jan. 1, 2024
We
provide
an
overview
of
recent
advances
in
the
structure,
preparation,
and
optical
properties
various
quantum
dots
(QDs),
discuss
strategies
for
improving
electroluminescence
performance
response
to
current
challenges
QD
research.
Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 2, 2025
Metal
halide
double
perovskites
with
splendid
optical
features
have
been
considerably
investigated
for
optoelectronic
applications.
Herein,
a
series
of
Mn2+-doped
Cs2NaLuCl6
perovskite
crystals
were
prepared.
Via
adopting
the
density
functional
theory
calculation,
effect
Mn2+
doping
on
electronic
structure
compound
was
discussed.
It
found
that
crystal
can
emit
intense
blue
light
from
host
self-trapped
exciton
(STE)
emission.
Excited
by
320
nm,
STE
and
emissions
simultaneously
observed
in
resulting
crystals.
Owing
to
efficient
energy
transfer
Mn2+,
polychromatic
luminescence
final
products.
Moreover,
taking
advantage
various
responses
emission
intensities
temperature,
thermometric
characteristics
investigated,
their
maximum
relative
sensitivity
is
0.99%
K-1,
which
hardly
impacted
content.
Furthermore,
prepared
exhibit
good
X-ray
radioluminescence
properties,
low
detection
limitation
0.99
μGyair
s-1.
Additionally,
utilizing
designed
crystal,
flexible
imaging
high
resolution
20
lp
mm-1
be
operated
high-temperature
environment
realized.
These
results
indicated
are
suitable
thermometry
imaging.
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.
Lead-free
double
perovskite
(DP)
materials
have
garnered
growing
interest
because
of
their
outstanding
optoelectronic
attributes.
Nevertheless,
realizing
efficient,
multimodal
photoluminescence
(PL)
with
adjustable
emission
spectra
within
single-host
DP
still
poses
a
formidable
hurdle.
Herein,
Er-based
lead-free
DPs
(Cs2NaErCl6)
were
developed,
which
achieves
downshift
(DS)
emissions
from
visible
to
near-infrared
(NIR)
and
multicolor
upconversion
(UC)
emissions,
resulting
the
abundant
energy
levels
Er3+
ions.
Alloying
Yb3+
introduces
new
Yb3+-Er3+
cross-relaxation
(CR)
pathways,
leading
308.5-fold
increase
in
DS
red
achieving
maximum
color
purity
98.63%.
Additionally,
alloying
enhances
UC
luminescence
by
10.8-fold
due
its
strong
absorption
cross
section
around
980
nm.
The
colors
can
be
adjusted
altering
doping
concentration
laser
power
density.
Spectral
analysis
theoretical
calculations
reveal
high
compatibility
ions
Cs2NaErCl6,
critical
role
CR
energy-transfer
processes
tunable,
PL.
Furthermore,
developed
been
utilized
anticounterfeiting,
information
encoding,
narrow-band
NIR
photodetectors,
expanding
versatile
uses
rare-earth
(RE)-based
optoelectronics
field.
