Nanomaterials,
Год журнала:
2022,
Номер
12(13), С. 2243 - 2243
Опубликована: Июнь 29, 2022
The
excellent
luminescence
properties
of
perovskite
quantum
dots
(PQDs),
including
wide
excitation
wavelength
range,
adjustable
emission
wavelength,
narrow
full
width
at
half
maximum
(FWHM),
and
high
photoluminescence
yield
(PLQY),
highly
match
the
application
requirements
in
emerging
displays.
Starting
from
fundamental
structure
related
optical
properties,
this
paper
first
introduces
existing
synthesis
approaches
PQDs
that
have
been
will
potentially
be
used
for
display
devices,
then
summarizes
stability
improving
with
retention
PQDs'
performance.
Based
on
above,
recent
research
progress
displays
is
further
elaborated.
For
photoluminescent
applications,
can
embedded
backlighting
device
or
color
filter
liquid
crystal
(LCD),
they
may
function
as
conversion
layer
blue
organic
light-emitting
diodes
(OLED)
micro-scale
(μLED).
In
terms
next-generation
electroluminescent
displays,
notable
quantum-dot
light
emitting
(PeQLED)
has
achieved
within
past
decade,
especially
external
efficiency
(EQE).
To
conclude,
key
directions
future
PQD
development
are
summarized
promising
prospects
widespread
applications
fields.
ACS Nano,
Год журнала:
2023,
Номер
17(15), С. 14347 - 14405
Опубликована: Июль 24, 2023
Light
has
profoundly
impacted
modern
medicine
and
healthcare,
with
numerous
luminescent
agents
imaging
techniques
currently
being
used
to
assess
health
treat
diseases.
As
an
emerging
concept
in
luminescence,
aggregation-induced
emission
(AIE)
shown
great
potential
biological
applications
due
its
advantages
terms
of
brightness,
biocompatibility,
photostability,
positive
correlation
concentration.
This
review
provides
a
comprehensive
summary
AIE
luminogens
applied
structure
dynamic
physiological
processes,
disease
diagnosis
treatment,
detection
monitoring
specific
analytes,
followed
by
representative
works.
Discussions
on
critical
issues
perspectives
future
directions
are
also
included.
aims
stimulate
the
interest
researchers
from
different
fields,
including
chemistry,
biology,
materials
science,
medicine,
etc.,
thus
promoting
development
fields
life
health.
Abstract
Carbon
dots
(CDs)
possess
outstanding
luminescence
properties,
making
them
widely
used
in
optical
displays,
anti‐counterfeiting
systems,
bioimaging,
and
sensors.
Presently,
there
is
much
debate
about
the
classification
of
CDs,
as
well
their
formation
process,
structure,
fluorescence
mechanisms.
Aggregation
plays
an
important
role
(e.g.,
aggregation‐induced
emission)
yet
seldom
studied
detail.
This
review
aims
fill
this
knowledge
gap,
by
first
exploring
how
aggregation
leads
to
different
types
CDs
graphene
quantum
dots,
carbon
carbonized
polymer
dots),
followed
a
detailed
examination
effect
morphology
on
properties
application
CDs.
Finally,
opportunities
challenges
for
various
applications
are
discussed,
with
need
better
mechanistic
understanding
being
imperative.
Advanced Materials,
Год журнала:
2023,
Номер
35(36)
Опубликована: Май 25, 2023
Deep-red
light-emitting
diodes
(DR-LEDs,
>660
nm)
with
high
color-purity
and
narrow-bandwidth
emission
are
promising
for
full-color
displays
solid-state
lighting
applications.
Currently,
the
DR-LEDs
mainly
based
on
conventional
emitters
such
as
organic
materials
heavy-metal
quantum
dots
(QDs)
perovskites.
However,
always
suffer
from
complicated
synthesis,
inferior
color
purity
full-width
at
half-maximum
(FWHM)
more
than
40
nm,
QDs
perovskites
still
serious
problems
related
to
toxicity.
Herein,
this
work
reports
synthesis
of
efficient
deep-red
carbon
(CDs)
a
record
narrow
FWHM
21
nm
yield
50%
readily
available
green
plants.
Moreover,
an
exciplex
host
is
further
established
using
polymer
small
molecular
blend,
which
has
been
shown
be
strategy
producing
monochrome
CDs
via
Förster
energy
transfer
(FET).
The
CD-LEDs
display
Commission
Internationale
de
l'Eclairage
(CIE)
coordinates
(0.692,
0.307).
To
best
knowledge,
first
report
in
region,
opening
door
application
development
high-resolution
technologies.
Chinese Journal of Chemistry,
Год журнала:
2023,
Номер
41(9), С. 1007 - 1014
Опубликована: Янв. 14, 2023
Comprehensive
Summary
Solid‐state
fluorescent
multi‐color
carbon
dots
(SFM‐CDs),
prepared
using
the
same
precursor(s)
without
need
for
dispersion
in
a
solid
matrix,
are
highly
demanded
wide
range
of
applications.
Herein,
we
report
microwave‐assisted
strategy
preparation
SFM‐CDs
with
blue,
yellow
and
red
emissions
within
5
min
from
precursors.
The
as‐prepared
B‐CDs,
Y‐CDs,
R‐CDs
possessed
bright
fluorescence
at
425
nm,
550
640
photoluminescence
quantum
yields
(PLQYs)
54.68%,
17.93%,
2.88%,
respectively.
structure
consisted
5‐oxo‐3,5‐dihydro‐2
H
‐thiazolo
[3,2‐
]
pyridine‐7‐carboxylic
acid
(TPCA)
immobilized
on
surface
core,
size
core
degree
disulfide
crosslinking
between
CDs
both
increasing
going
B‐CDs
to
R‐CDs,
as
verified
by
mechanochromic
experiments.
excellent
solid‐state
performance
allowed
their
utilization
converter
layer
LEDs
white
high
color
rendering
index.
Abstract
Clusteroluminogens
(CLgens),
nonconjugated
structures
with
visible
luminescence
at
the
clustering
state,
have
recently
received
remarkable
attention
due
to
their
great
theoretical
significance
and
practical
values.
In
carbonyl‐based
aliphatic
polymers,
(
n
,
π
*)
transition
of
carbonyl
groups
through‐space
interactions
been
demonstrated
play
an
important
role
in
clusteroluminescence
(CL)
properties,
but
it
is
still
a
big
challenge
manipulate
CL
molecular
level.
this
work,
six
polymers
different
heteroatoms
steric
hindrances
were
synthesized,
photophysical
properties
systematically
studied.
These
all
showed
emission
efficiency
wavelength.
Experimental
studies
indicated
that
could
be
manipulated
by
changing
electronic
rigidity
polymer
chains.
This
work
not
only
gains
further
insights
into
mechanism
also
provides
reliable
strategies
design
non‐conjugated
luminescent
materials.
Abstract
Room
temperature
phosphorescence
(RTP)
materials
have
drawn
considerable
attention
by
virtue
of
their
outstanding
features.
Compared
with
organometallic
complexes
and
pure
organic
compounds,
carbon
dots
(CDs)
emerged
as
a
new
type
RTP
materials,
which
show
great
advantages,
such
moderate
reaction
condition,
low
toxicity,
cost,
tunable
optical
properties.
In
this
review,
the
important
progress
made
in
CDs
is
summarized,
an
emphasis
on
latest
developments.
The
synthetic
strategies
will
be
comprehensively
followed
detailed
introduction
performance
regulation
potential
applications
anti‐counterfeiting,
information
encryption,
sensing,
light‐emitting
diodes,
biomedicine.
Finally,
remaining
major
challenges
for
are
discussed
opportunities
future
proposed.
Abstract
It
is
important
to
reveal
the
luminescence
mechanisms
of
carbon
dots
(CDs).
Herein,
CDs
with
two
types
optical
centers
are
synthesized
from
citric
acid
in
formamide
by
a
solvothermal
method,
and
show
high
photoluminescence
quantum
yield
reaching
42%.
Their
green/yellow
emission
exhibits
pronounced
vibrational
structure
resistance
toward
photobleaching,
while
broad
red
sensitive
solvents,
temperature,
UV–IR.
Under
UV–IR,
gradually
bleached
due
photoinduced
dehydration
deprotonated
surface
dimethyl
sulfoxide,
this
process
hindered
water.
From
analysis
steady‐state
time‐resolved
transient
absorption
data
together
density
functional
theory
calculations,
green/
yellow
assigned
conjugated
sp
2
‐domains
(core
state)
similar
organic
dye
derivatives
stacked
within
disk‐shaped
CDs;
emission—to
oxygen‐containing
groups
bound
(surface
state),
whereas
energy
transfer
core
state
can
happen.
