Advanced Optical Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 12, 2025
Abstract
To
realize
the
practical
application
of
carbon
dots
(CDs),
it
is
crucial
to
devise
straightforward
techniques
that
can
finely
modulate
fluorescent
properties
CDs.
Apart
from
that,
imperative
weaken
aggregation‐caused
quenching
(ACQ)
effect,
which
poses
a
significant
challenge
utilization
solid‐state
In
this
work,
three
CDs
named
as
CDs‐1,
CDs‐2,
and
CDs‐3
are
synthesized,
fluorescence
tuning
these
successfully
realized,
assisted
by
cetyltrimethylammonium
bromide
(CTAB)
surfactant,
because
its
unique
molecular
structure
conducive
in
bolstering
intensity
adjusting
emission
wavelength.
Furthermore,
luminescence
achieved
employing
CTAB
substrate
matrix‐assisted
synthesis
composites
CDs‐1@CTAB,
CDs‐2@CTAB,
CDs‐3@CTAB.
Notably,
photoluminescence
quantum
yield
(PLQY)
CDs‐2@CTAB
reaches
an
impressive
value
high
79.31%,
surpassing
70.29%
obtained
pristine
CDs‐2.
The
experimental
results
reveal
CDs@CTAB
exhibit
intriguing
afterglow
characteristics
including
room
temperature
phosphorescence
(RTP)
thermally
activated
delayed
(TADF).
This
work
confirms
versatility
highlights
significance
surfactant‐assisted
strategies
improving
performance
Nano Letters,
Год журнала:
2024,
Номер
24(42), С. 13307 - 13314
Опубликована: Окт. 10, 2024
Long-wavelength
afterglow
emitters
are
crucial
for
optoelectronics
and
information
security;
however,
it
remains
a
challenge
in
achieving
high
luminescence
efficiency
due
to
the
lack
of
effective
modulation
electronic
coupling
nonradiative
transitions
singlet/triplet
excitons.
Here,
we
demonstrate
an
organic-carbon-dot
(CD)
hybrid
system
that
operates
via
space-confined
energy
transfer
strategy
obtain
bright
emission
centered
at
600
nm
with
near-unity
efficiency.
Photophysical
characterization
theoretical
calculation
confirm
efficient
can
be
assigned
synergistic
effect
intermolecular
from
triplet
excitons
CDs
singlets
subluminophores
intense
restraint
decay
losses
singlet/triplet-state
rationally
rigidification
amination
modification.
By
utilizing
precursor
engineering,
yellow
near-infrared
575
680
efficiencies
94.4%
45.9%
has
been
obtained.
Lastly,
these
highly
emissive
powders
enable
superior
performance
lighting
security.
ACS Applied Materials & Interfaces,
Год журнала:
2024,
Номер
unknown
Опубликована: Сен. 19, 2024
Carbon
dots
(CDs)
are
an
emerging
type
of
fluorescent
carbon
nanomaterial
with
broad
application
prospects.
Among
them,
photochromic
CDs
have
been
widely
used
in
the
field
optoelectronic
devices
but
rarely
ultraviolet
(UV)
detection.
In
this
work,
we
successfully
developed
that
exhibit
reversible
emission
under
light
stimulation
amine
solvent
system.
Notably,
showed
ultrafast
behavior
diethylamine
solvent,
shifting
fluorescence
color
from
cyan-green
to
orange-red
after
2
s
irradiation,
solution
changing
pale
yellow
purple.
Furthermore,
performance
could
recover
without
additional
stimuli,
simply
by
standing
for
several
tens
seconds.
Structural
analysis
indicated
rapid
photochromism
arises
changes
surface
functional
group
radicals
CDs,
reversibility
attributed
fluctuation
these
radicals.
Leveraging
excellent
properties
further
a
device
detecting
UV
indices
sunlight.
This
opens
up
prospects
developing
high-performance
detection
based
on
CDs.
Langmuir,
Год журнала:
2024,
Номер
40(42), С. 22409 - 22416
Опубликована: Окт. 8, 2024
The
phenomenon
of
multicolor
afterglow
emission
has
attracted
considerable
attention
in
information
encryption,
bioimaging,
and
sensing.
Consequently,
there
is
a
growing
demand
for
the
development
phosphorescence
switching
methods
utilizing
carbon
dot
(CD)
materials.
Herein,
room-temperature
(RTP)
CD-based
materials
(PM-CD@BA
composite)
was
achieved
by
developing
multiple
centers
tuning
excitation
wavelength.
color
observed
this
composite
covered
from
deep-blue
to
green
region.
experimental
results
reveal
that
under
heating
treatment,
CDs
embedded
inorganic
boric
acid/B
