Advanced Optical Materials,
Год журнала:
2024,
Номер
13(1)
Опубликована: Сен. 24, 2024
Abstract
Dye‐sensitized
down‐conversion
nanoparticles
(DCNPs)
can
significantly
enhance
photon
absorption,
bridging
the
gap
of
narrow
and
weak
absorption
cross‐section
lanthanide
(Ln)
ions,
thus
fundamentally
prompting
their
near‐infrared
(NIR)
emission.
However,
ideal
strategy
for
utilization
both
singlet
triplet
energy
dyes
is
hindered
by
nanostructures
dependence
on
heavy
atom
effect.
Herein,
thermally
activated
delayed
fluorescence
(TADF)
dye
utilized
with
a
small
singlet‐triplet
as
antenna,
achieving
733
fold
emission
enhancement.
This
facilitates
efficient
intersystem
crossing
(ISC)
reverse
(RISC)
processes,
enabling
effective
transfer
from
(S
1
)
(T
excitons
to
emitted
levels
Er
3+
.
Combining
highly
Erbium‐doped
nanoparticles,
water‐dispersed
AD‐sensitized
system
shows
excellent
hydrodynamic
stability
photostability.
innovative
approach
marks
first
report
TADF
dye‐sensitized
Ln
nanosystems,
offering
new
direction
photo
conversion
technology.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Май 8, 2024
Abstract
Room
temperature
phosphorescence
materials
have
garnered
significant
attention
due
to
their
unique
optical
properties
and
promising
applications.
However,
it
remains
a
great
challenge
finely
manipulate
phosphorescent
achieve
desirable
performance
on
demand.
Here,
we
show
feasible
strategy
organic
by
introducing
dynamic
lanthanide
coordination.
The
phosphors
of
terpyridine
phenylboronic
acids
possessing
excellent
coordination
ability
are
covalently
embedded
into
polyvinyl
alcohol
matrix,
leading
ultralong
room
with
lifetime
up
0.629
s.
Notably,
such
performance,
including
intensity
lifetime,
can
be
well
controlled
varying
the
dopant.
Relying
modulable
these
lanthanide-manipulated
films,
multi-level
information
encryption
attacker-misleading
spatial-time-resolved
applications
is
successfully
demonstrated
greatly
improved
security
level.
This
work
opens
an
avenue
for
manipulating
meet
versatile
uses
in
Lanthanide-doped
upconversion
nanoparticles
(UCNPs)
hold
promise
for
single-molecule
imaging
owing
to
their
excellent
photostability
and
minimal
autofluorescence.
However,
limited
water
dispersibility,
often
from
the
hydrophobic
oleic
acid
ligand
during
synthesis,
is
a
challenge.
To
address
this,
various
surface
modification
strategies'
impact
on
single-particle
luminescence
are
studied.
UCNPs
made
hydrophilic
through
methods
like
exchange
with
dye
IR806,
HCl
or
NOBF
Rare
earth-doped
upconversion
nanoparticles
(UCNPs)
have
achieved
a
wide
range
of
applications
in
the
sensing
field
due
to
their
unique
anti-Stokes
luminescence
property,
minimized
background
interference,
excellent
biocompatibility,
and
stable
physicochemical
properties.
However,
UCNPs-based
platforms
still
face
several
challenges,
including
inherent
limitations
from
UCNPs
such
as
low
quantum
yields
narrow
absorption
cross-sections,
well
constraints
related
energy
transfer
efficiencies
systems.
Therefore,
construction
high-performance
is
an
important
cornerstone
for
conducting
relevant
research.
This
work
begins
by
providing
brief
overview
mechanism
UCNPs.
Subsequently,
it
offers
comprehensive
summary
sensors'
types,
design
principles,
optimized
strategies
platforms.
More
cost-effective
promising
point-of-care
testing
implemented
based
on
systems
are
also
summarized.
Finally,
this
addresses
future
challenges
prospects
Advanced Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 16, 2025
Abstract
Upconversion
nanoparticles
(UCNPs),
incorporating
lanthanide
(Ln)
dopants,
can
convert
low‐energy
near‐infrared
photons
into
higher‐energy
visible
or
ultraviolet
light
through
nonlinear
energy
transfer
processes.
This
distinctive
feature
has
attracted
considerable
attention
in
both
fundamental
research
and
advanced
optoelectronics.
Challenges
such
as
low
energy‐conversion
efficiency
nonradiative
losses
limit
the
performance
of
UCNP‐based
optoelectronic
devices.
Recent
advancements
including
optimized
core–shell
structures,
tailed
Ln‐doping
concentration,
surface
modifications
show
significant
promise
for
improving
stability.
In
addition,
combining
UCNPs
with
functional
materials
broaden
their
applications
improve
device
performance,
paving
way
innovation
next‐generation
paper
first
categorizes
elaborates
on
various
upconversion
mechanisms
UCNPs,
focusing
strategies
to
boost
prolong
luminescence.
Subsequently,
an
in‐depth
discussion
that
enhance
expand
functionality
is
provided.
Furthermore,
a
wide
range
devices
explored,
multiple
emerging
neuromorphic
computing
are
highlighted.
Finally,
existing
challenges
potential
solutions
involved
developing
practical
considered,
well
outlook
future
technologies
Lanthanide-doped
upconversion
nanoparticles
(UCNPs)
can
convert
low-energy
near-infrared
(NIR)
light
into
high-energy
visible
light,
making
them
valuable
for
broad
applications.
UCNPs
often
suffer
from
poor
light-harvesting
capabilities,
which
be
significantly
improved
by
incorporating
organic
dye
antennas.
However,
the
dye-sensitized
systems
are
prone
to
severe
photobleaching
in
an
ambient
atmosphere.
Here,
we
present
a
synergistic
approach
mitigate
introducing
triplet
state
quencher
cyclooctatetraene
(COT).
COT
effectively
suppresses
generation
of
singlet
oxygen
quenching
states
and
consumes
existing
through
oxidant
reactions.
The
inclusion
extends
half-life
IR806
4.7-times
preventing
oxidation
its
poly(methylene)
chains.
Without
affecting
emission
intensity
dynamics,
stabilized
dye-UCNPs,
demonstrating
notable
3.9-fold
increase
under
continuous
laser
irradiation.
Our
findings
suggest
new
strategy
enhance
photostability
dyes
nanohybrids.
ACS Applied Optical Materials,
Год журнала:
2024,
Номер
2(9), С. 1825 - 1840
Опубликована: Апрель 9, 2024
Triplet
energy
transfer
between
organic
dyes
and
lanthanide-doped
luminescent
nanoparticles
(LnLNPs)
energetically
bridges
inorganic
LnLNPs,
which
can
combine
superiority
overcome
limitations
associated
with
the
optical
properties
of
LnLNPs.
As
a
result,
triplet
enable
unprecedented
performance
LnLNPs
in
harvest
conversion
photonic
energy.
In
this
review,
we
first
introduce
some
fundamentals
transfer.
Probing
methods
manipulation
strategies
for
are
then
surveyed,
recent
research
directions
corresponding
achievements
reviewed.
Finally,
challenges
perspectives
pursuing
robust,
flexible,
efficient
discussed.
Applied Physics Reviews,
Год журнала:
2024,
Номер
11(2)
Опубликована: Июнь 1, 2024
Lanthanide-doped
nanoparticles
(LnNPs)
show
unique
optical
properties
and
have
been
demonstrated
in
various
applications,
including
imaging,
optogenetics,
photothermal
therapy,
photodynamic
light-controlled
release/cross-linking,
anticounterfeiting,
lasing,
sensing,
super-resolution
microscopy.
One
of
the
key
urgent
limitations
LnNPs
is
weak
narrow
absorption
lanthanides.
Fabrication
heterostructures
will
overcome
this
hurdle
enhance
performance
LnNPs.
Developing
novel
to
lanthanides
studying
energy
transfer
pathways
efficiencies
are
broad
interest
chemical
physical
research
community.
There
currently
no
systematic
review
summarize
different
types
LnNP
heterostructures.
Thus,
five
combining
with
organic
inorganic
dyes,
plasmonics,
semiconducting
quantum
dots,
metal–organic
frameworks.
The
enhancement
improvement
light
conversion
compared
discussed.
This
also
discusses
between
other
components
provides
suggestions
form
enhanced
efficient
for
future
applications.
We
hope
further
inspire
active
development
study
lanthanide-based
stronger
absorption,
better
performance,
ease
multifunctionality.
