Chemical Reviews,
Год журнала:
2020,
Номер
121(3), С. 1425 - 1462
Опубликована: Дек. 18, 2020
The
spectrally
narrow,
long-lived
luminescence
of
lanthanide
ions
makes
optical
nanomaterials
based
on
these
elements
uniquely
attractive
from
both
a
fundamental
and
applicative
standpoint.
A
highly
coveted
class
such
is
represented
by
colloidal
lanthanide-doped
semiconductor
nanocrystals
(LnSNCs).
Therein,
upon
proper
design,
the
poor
light
absorption
intrinsically
featured
lanthanides
compensated
moiety,
which
harvests
energy
funnel
it
to
luminescent
metal
center.
Although
great
deal
experimental
effort
has
been
invested
produce
efficient
that
sort,
relatively
modest
results
have
obtained
thus
far.
As
late,
halide
perovskite
surged
as
materials
choice
for
doping
lanthanides,
but
they
non-negligible
shortcomings
in
terms
chemical
stability,
toxicity,
range.
limited
gamut
currently
available
LnSNCs
unfortunate,
given
tremendous
technological
impact
could
fields
like
biomedicine
optoelectronics.
In
this
review,
we
provide
an
overview
field
LnSNCs,
while
distilling
lessons
learnt
material
design.
result
compendium
key
aspects
consider
when
devising
synthesizing
nanomaterials,
with
keen
eye
foreseeable
scenarios
where
are
poised
become
front
runners.
Chemical Society Reviews,
Год журнала:
2022,
Номер
51(5), С. 1729 - 1765
Опубликована: Янв. 1, 2022
Lanthanide-based
upconversion
nanomaterials
have
recently
attracted
considerable
attention
in
both
fundamental
research
and
various
frontier
applications
owing
to
their
excellent
photon
performance
favourable
physicochemical
properties.
In
particular,
the
emergence
of
multi-layer
core-shell
(MLCS)
nanostructures
offers
a
versatile
powerful
tool
realize
well-defined
matrix
compositions
spatial
distributions
dopant
on
nanometer
length
scale.
contrast
conventional
commonly
investigated
nanoparticles,
rational
design
MLCS
allows
us
deliberately
introduce
more
functional
properties
into
an
system,
thus
providing
unprecedented
opportunities
for
precise
manipulation
energy
transfer
channels,
dynamic
control
processes,
fine
tuning
switchable
emission
colours
new
integration
at
single-particle
level.
this
review,
we
present
summary
discussion
key
aspects
recent
progress
lanthanide-based
including
lifetime,
multicolour
output
lanthanide
ionic
interactions
nanoscale.
Benefitting
from
multifunctional
luminescence
properties,
exhibit
great
potential
diversities
such
as
three-dimensional
display,
laser,
optical
memory,
anti-counterfeiting,
thermometry,
bioimaging,
therapy.
The
outlook
challenges
well
perspectives
nanostructure
materials
are
also
provided.
This
review
would
be
greatly
helpful
exploring
structural
designs
further
manipulate
phenomenon
expand
application
boundaries.
Advanced Materials,
Год журнала:
2020,
Номер
33(6)
Опубликована: Июль 8, 2020
Abstract
Light
in
the
near‐infrared
(NIR)
spectral
region
is
increasingly
utilized
bioapplications,
providing
deeper
penetration
biological
tissues
owing
to
lower
absorption
and
scattering
comparison
with
light
visible
range.
Lanthanide‐doped
luminescent
nanoparticles
excitation
and/or
emission
NIR
range
have
recently
attracted
tremendous
attention
as
one
of
prime
candidates
for
noninvasive
applications
due
their
unique
optical
properties,
such
large
Stokes
shift,
spectrally
sharp
luminescence
emissions,
long
lifetimes,
excellent
photostability.
Herein,
recent
advances
lanthanide‐doped
upconversion
or
downshifting
uses
cutting‐edge
biophotonic
are
presented.
A
set
efficient
strategies
overcoming
fundamental
limit
low
brightness
introduced.
An
in‐depth
literature
review
state‐of‐art
biophotonics
also
included,
showing
superiority
high‐resolution
imaging,
single‐nanoparticle‐level
detection,
efficacy
tissue‐penetrating
diagnostics
therapeutics.
Nature Communications,
Год журнала:
2020,
Номер
11(1)
Опубликована: Март 4, 2020
Abstract
Photon
upconversion
in
lanthanide-doped
nanoparticles
offers
a
wide
variety
of
applications
including
deep-tissue
biophotonics.
However,
the
luminescence
and
efficiency,
especially
involving
multiple
photons,
is
still
limited
by
concentration
quenching
effect.
Here,
we
demonstrate
multilayered
core-shell-shell
structure
for
lanthanide
doped
NaYF
4
,
where
Er
3+
activators
Yb
sensitizers
are
spatially
separated,
which
can
enhance
multiphoton
emission
from
100-fold
compared
with
canonical
core-shell
nanocrystals.
This
difference
due
to
excitation
energy
transfer
at
interface
between
activator
core
sensitizer
shell
being
unexpectedly
efficient,
as
revealed
structural
temperature
dependence
luminescence.
Therefore,
suppressed
via
alleviation
cross-relaxation
sensitizer,
resulting
high
quantum
yield
up
6.34%
this
layered
structure.
These
findings
will
enable
versatile
design
upconverting
overcoming
conventional
limitation.
Chemical Reviews,
Год журнала:
2020,
Номер
121(3), С. 1425 - 1462
Опубликована: Дек. 18, 2020
The
spectrally
narrow,
long-lived
luminescence
of
lanthanide
ions
makes
optical
nanomaterials
based
on
these
elements
uniquely
attractive
from
both
a
fundamental
and
applicative
standpoint.
A
highly
coveted
class
such
is
represented
by
colloidal
lanthanide-doped
semiconductor
nanocrystals
(LnSNCs).
Therein,
upon
proper
design,
the
poor
light
absorption
intrinsically
featured
lanthanides
compensated
moiety,
which
harvests
energy
funnel
it
to
luminescent
metal
center.
Although
great
deal
experimental
effort
has
been
invested
produce
efficient
that
sort,
relatively
modest
results
have
obtained
thus
far.
As
late,
halide
perovskite
surged
as
materials
choice
for
doping
lanthanides,
but
they
non-negligible
shortcomings
in
terms
chemical
stability,
toxicity,
range.
limited
gamut
currently
available
LnSNCs
unfortunate,
given
tremendous
technological
impact
could
fields
like
biomedicine
optoelectronics.
In
this
review,
we
provide
an
overview
field
LnSNCs,
while
distilling
lessons
learnt
material
design.
result
compendium
key
aspects
consider
when
devising
synthesizing
nanomaterials,
with
keen
eye
foreseeable
scenarios
where
are
poised
become
front
runners.
