ACS Applied Materials & Interfaces,
Год журнала:
2023,
Номер
15(44), С. 51462 - 51473
Опубликована: Окт. 27, 2023
All-inorganic
halide
perovskites
(AIHPs)
have
emerged
as
highly
promising
optoelectronic
materials
owing
to
their
remarkable
properties,
such
high-optical
absorption
coefficients,
photoluminescence
efficiencies,
and
dopant
tolerance.
Here,
we
investigate
the
AIHPs
K4CdCl6:Sb3+,Mn2+
that
demonstrate
hue-tunable
white-light
emission
with
an
exceptional
quantum
yield
of
up
97%.
Through
a
detailed
investigation,
reveal
efficient
energy
transfer
from
Sb3+
Mn2+
plays
dominant
role
in
Mn2+,
instead
conventional
4T1g
→
6A1g
transition
Mn2+.
Thermodynamic
analysis
highlights
crucial
Cl-rich
environment
obtaining
K4CdCl6
phase,
while
transformation
KCdCl3
can
be
achieved
under
Cl-poor
K-poor
conditions.
The
theoretical
reveals
defect
Cli
is
more
readily
formed
compared
VK,
corroborating
experimental
findings
K4CdCl6:Sb3+
phase
exclusively
obtained
when
solution
contains
HCl
concentrations
higher
than
4
mol
L-1.
Our
work
provides
valuable
insights
into
mechanism
Sb3+,
engineering
through
heterovalent
doping,
between
K-Cd-Cl-based
perovskites,
which
offers
new
perspective
for
design
development
novel
superior
performance.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Июнь 20, 2024
Abstract
Long
persistent
luminescence
(LPL)
has
gained
considerable
attention
for
the
applications
in
decoration,
emergency
signage,
information
encryption
and
biomedicine.
However,
recently
developed
LPL
materials
–
encompassing
inorganics,
organics
inorganic-organic
hybrids
often
display
monochromatic
afterglow
with
limited
functionality.
Furthermore,
triplet
exciton-based
phosphors
are
prone
to
thermal
quenching,
significantly
restricting
their
high
emission
efficiency.
Here,
we
show
a
straightforward
wet-chemistry
approach
fabricating
multimode
by
introducing
both
anion
(Br
−
)
cation
(Sn
2+
doping
into
hexagonal
CsCdCl
3
all-inorganic
perovskites.
This
process
involves
establishing
new
trapping
centers
from
[CdCl
6-n
Br
n
]
4−
and/or
[Sn
2-n
Cd
Cl
9
5−
linker
units,
disrupting
local
symmetry
host
framework.
These
halide
perovskites
demonstrate
duration
time
(
>
2,000
s),
nearly
full-color
coverage,
photoluminescence
quantum
yield
~
84.47%),
anti-thermal
quenching
temperature
up
377
K.
Particularly,
:
x
%Br
temperature-dependent
time-valve
controllable
time-dependent
luminescence,
while
%Sn
exhibit
forward
reverse
excitation-dependent
Janus-type
luminescence.
Combining
experimental
computational
studies,
this
finding
not
only
introduces
local-symmetry
breaking
strategy
simultaneously
enhancing
lifetime
efficiency,
but
also
provides
insights
dynamic
tunability
photonics,
high-security
anti-counterfeiting
storage.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
16(3), С. 3841 - 3852
Опубликована: Янв. 11, 2024
In
recent
years,
low-dimensional
organic–inorganic
hybrid
metal
halides
(OIHMHs)
have
shown
excellent
photophysical
properties
due
to
their
quantum
structure,
adjustable
energy
levels,
and
transfer
between
inorganic
organic
components,
which
attracted
extensive
attention
from
researchers.
Herein,
we
synthesize
a
zero-dimensional
(0D)
OIHMH,
Sb3+:(Gua)3InCl6,
by
introducing
Sb3+
into
(Gua)3InCl6,
undergoes
significant
enhancement
of
the
emission
peak
at
580
nm
with
photoluminescence
yield
(PLQY)
boosted
17.86
95.72%
when
excited
340
nm.
This
boost
in
doped
sample
was
studied
combining
ultrafast
femtosecond
transient
absorption,
temperature-dependent
(PL)
spectra,
density
functional
theory
(DFT)
calculation,
revealing
process
self-trapped
exciton
(STE)
recombination
emit
light
both
Sb
sites
this
0D
structure
simultaneously.
material
lowest
dark
STE
level
site
for
undoped
can
amazingly
very
strong
sample,
has
never
been
observed
before.
Finally,
tested
its
application
photoelectric
device.
work
not
only
helps
gain
deeper
understanding
formation
STEs
In-based
but
also
plays
certain
guiding
role
design
new
luminescent
materials.
Applied Physics Letters,
Год журнала:
2024,
Номер
124(9)
Опубликована: Фев. 26, 2024
Exploring
efficient
and
stable
long-persistent
luminescence
(LPL)
materials
is
of
great
value
for
promoting
their
advanced
applications.
Here,
the
metal
halide
CsCdCl3:Mn2+
crystals
with
tunable
afterglow
properties
good
stability
were
grown
by
a
facile
solution
method.
Upon
ultraviolet
excitation,
exhibited
bright
orange
emission
at
590
nm
from
d–d
transition
Mn2+
ions.
doping
concentrations
matter
LPL
performance.
By
optimizing
amount
Mn2+,
an
enhanced
duration
up
to
12
000
s
was
achieved,
compared
undoped
sample,
originating
trap
redistribution.
The
deep
traps
in
CsCdCl3:0.1Mn2+
crystal
that
provide
little
contribution
room
temperature
shifted
shallow
levels,
thus
synergistically
enhancing
intensity
duration.
Based
on
variable
durations
tuning
concentrations,
multi-dimensional
information
storage
encryption
model
designed.
This
work
gives
understanding
effect
provides
examples
development
encryption.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 3, 2025
Abstract
Localized‐state
luminescence
(LSL)
has
emerged
as
a
promising
mechanism
for
high‐performance
optoelectronic
applications,
including
lighting,
photodetection,
and
quantum
technologies.
Characterized
by
rich
intriguing
spectral
features,
LSL
involves
significant
electron‐phonon
coupling,
which
varies
in
strength
across
different
systems.
First‐principles
methods,
particularly
density
functional
theory
(DFT)
its
extensions
provide
an
efficient
framework
modeling
the
process
with
reasonable
accuracy.
This
comprehensive
review
examines
DFT‐based
studies
on
three
representative
types
of
solids:
from
self‐trapped
excitons
(STEs),
normal
defects,
intentionally
doped
ions.
The
discussion
begins
overview
entire
process,
highlighting
computational
methods
excited
state
structures
energies,
well
simulations
luminescent
spectrum
within
multi‐phonon
transition
framework.
Detailed
discussions
follow,
focusing
structural
distortion
modes
STEs,
behavior
mechanisms
Finally,
strategies
to
address
current
challenges
advance
theoretical
design
materials
are
proposed,
offering
valuable
insights
future
developments
field.
Journal of Materials Chemistry C,
Год журнала:
2023,
Номер
12(5), С. 1728 - 1745
Опубликована: Дек. 18, 2023
Temperature-dependent
photoluminescence
to
understand
negative
thermal
quenching
in
Zn
2
GeO
4
,
and
Pr
3+
doping
for
trap
tuning
the
enhanced
formation
of
defect
states
leading
ultralong
(>18
h)
X-ray
persistent
luminescence.
ACS Applied Nano Materials,
Год журнала:
2024,
Номер
7(1), С. 1319 - 1326
Опубликована: Янв. 4, 2024
Solid-state
materials
with
long-persistence
phosphorescence
always
suffer
serious
thermal
quenching
effect
that
greatly
hinders
their
applications
at
high-temperature
conditions
(>373
K).
Therefore,
developing
(HTP)
remains
a
great
challenge.
In
this
work,
cytosine
(Cyt)
is
hybridized
indium
chloride
into
zero-dimensional
(Cyt)2[InCl5·H2O]
(CICH).
A
green
afterglow
up
to
1.0
s
observed
room
temperature
for
CICH
but
almost
quenched
448
K
due
the
effect.
Upon
removing
coordinated
H2O
molecules
of
(denoted
CIC),
CIC
shows
an
excellent
performance
HTP
persistence
time
0.4
even
K.
The
improved
resistance
attributed
removal
molecules,
which
leads
reduced
free
volume
Cyt,
thereby
suppressing
molecular
vibration
and
rotation.
Additionally,
can
be
facilely
tailored
through
Sb3+
doping
efficient
triplet
energy
transfer.
At
last,
given
high
tolerance
CIC,
temperature-sensitive
anticounterfeiting
successfully
demonstrated.
The Journal of Physical Chemistry Letters,
Год журнала:
2023,
Номер
14(44), С. 10003 - 10011
Опубликована: Окт. 31, 2023
Recently,
transparent
afterglow
phosphors
have
attracted
increasing
interest
due
to
the
mitigated
self-absorption
and
ensuing
improved
light
output,
which
inspired
many
advanced
applications,
including
volumetric
display
three-dimensional
optical
encryption.
To
date,
most
successful
remain
those
traditional
oxide,
nitride,
or
sulfide
powders
are
not
a
severe
scattering
effect.
By
reduction
of
number
interfaces
engineering
refractive
index,
effect
could
be
circumvented
effectively.
this
end,
four
material
systems,
single
crystals,
phosphorescent
organics,
glass,
luminescent
nanocomposites,
were
reviewed
in
Perspective.
We
started
with
discussion
nontransparency
origin.
Through
careful
inspection
Rayleigh
theory,
general
solution
involving
both
index
particle
size
was
proposed
reduce
Many
representative
works
on
systematically
reviewed,
where
typical
synthesis
methods
advantages
disadvantages
each
system
critically
presented.
In
last
part,
bottlenecks,
prospects,
future
development
directions
based
proposed.