Thermally
activated
delayed
fluorescence
(TADF)
carbon
dots
(CDs)
have
generated
interest
due
to
their
ability
capture
singlet
and
triplet
excitons
for
efficient
emission.
However,
there
are
still
challenges
in
achieving
high
photocatalytic
efficiency
traditional
TADF
CDs
prepared
by
matrix-confinement
strategies.
Herein,
we
propose
a
facile
one-pot
solvothermal
synthesis
strategy
of
matrix-free
carbonized
polymer
(CPDs)
with
an
absorption
wavelength
up
the
red-light
region
long
lifetime
7.66
μs
DMSO.
The
unprecedented
high-efficiency
CPDs
as
photocatalyst
both
organic
aqueous
solvents
has
been
demonstrated
first
time
red-light-triggered
photoinduced
electron/energy
transfer–reversible
addition–fragmentation
chain
transfer
(PET-RAFT)
polymerization
atom
radical
(photo-ATRP),
monomer
conversion
(>90%)
narrow
dispersity
(Mw/Mn
<
1.20).
In
addition,
designed
also
successfully
utilized
inverse
miniemulsion
PET-RAFT
system,
expanding
application
scope
reversible
deactivation
(photo-RDRP).
This
work
offers
unique
avenue
designing
regulating
intersystem
crossing
(ISC)
reverse
(RISC)
processes
achieve
CD
photocatalysts
long-lived
excited
states
effectively
photocatalyzed
RDRP.
Accounts of Chemical Research,
Год журнала:
2024,
Номер
57(19), С. 2928 - 2939
Опубликована: Сен. 19, 2024
ConspectusCarbon
dots
(CDs),
as
a
novel
type
of
fluorescent
nanocarbon
material,
attract
widespread
attention
in
nanomedicine,
optoelectronic
devices,
and
energy
conversion/storage
due
to
their
excellent
optical
properties,
low
toxicity,
high
stability.
They
can
be
classified
graphene
quantum
dots,
carbon
carbonized
polymer
(CPDs).
Among
these,
CPDs
exhibit
tunable
structures
components
that
allow
fine-tuning
making
them
one
the
most
popular
types
CDs
recent
years.
However,
structural
complexity
stimulates
deep
exploration
relationship
between
unique
structure
luminescent
performance.
As
an
organic-inorganic
hybrid
system,
diversity
self-limited
state
cores
polymer-hybrid
shell
layers
makes
understanding
underlying
mechanisms
structure-property
relationships
very
challenging
task.
In
this
context,
elucidating
composition
factors
affect
properties
is
vital
if
enormous
potential
realized.
Achieving
controllable
with
predefined
via
adoption
specific
functionalization
strategies
prized
goal
current
researchers
field.In
Account,
we
describe
efforts
made
by
our
group
synthesis,
mechanism
analysis,
regulation,
functional
applications
CPDs,
particular
emphasis
on
design
core-shell
tailored
for
fields
optoelectronics
energy.
Specifically,
through
rational
selection
precursors,
optimization
reaction
conditions,
postmodification
have
demonstrated
it
possible
regulate
both
core
layers,
thereby
achieving
full-spectrum
emission,
yield,
persistent
luminescence,
thermally
activated
delayed
fluorescence,
laser
action
CPDs.
Furthermore,
established
structure-performance
proposed
universal
strategy
synergistic
interactions
carbon-based
surface
micronanostructures.
addition,
unveiled
luminescence
cross-linked
specifically
"cross-linking
synergistically
inducing
quantum-state
luminescence",
which
addresses
challenge
efficient
circularly
polarized
liquid
solid
phases
Subsequently,
strong
cross-linking,
dual-rigidity,
ordering
preparation
methods
were
introduced,
pioneering
emission
from
blue
near-infrared
wavelengths.
Additionally,
developed
new
"confined
composite
nanocrystals
CPDs",
leading
various
high-performance
hydrogen
evolution
catalysts
water
electrolysis.
The
not
only
possessed
but
also
enabled
efficiencies
field
conversion,
thus
maximizing
utilization
Finally,
discuss
important
trends
CPD
research
development.
Overall,
Account
summarizes
latest
advancements
years,
providing
case-studies
enable
structure-property-performance
regulation
guiding
future
expansion
application
Advanced Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 3, 2024
Abstract
Stimuli‐responsive
circularly
polarized
luminescent
(CPL)
materials
are
expected
to
find
widespread
application
in
advanced
information
technologies,
such
as
3D
displays,
multilevel
encryption,
and
chiral
optical
devices.
Here,
using
R‐/S‐α‐phenylethylamine
3,4,9,10‐perylenetetracarboxylic
dianhydride
precursors,
carbon
dots
(Ch‐CDs)
exhibiting
bright
concentration‐dependent
luminescence
synthesized,
demonstrating
reversible
responses
both
their
morphologies
emission
spectra.
By
adjusting
Ch‐CD
concentration,
the
switchable
wavelength
is
extended
over
180
nm
(539–720
nm),
with
maximum
quantum
efficiency
reaching
100%.
Meanwhile,
upon
increasing
red‐shifts,
while
chirality
of
assembled
nanoribbons
synchronously
amplified,
ultimately
achieving
CPL
at
709
a
asymmetry
factor
2.18
×
10
−2
.
These
values
represent
longest
largest
g
lum
reported
for
CDs.
Considering
remarkable
properties
synthesized
Ch‐CDs,
logic
gates
designed,
potential
practical
applications
demonstrated
anti‐counterfeiting
flexible
electronic
printing,
solid‐state
CPL.
Furthermore,
deep‐red
electroluminescence
light‐emitting
diodes
(EL‐LEDs)
prepared
these
an
external
1.98%,
which
highest
value
date
CDs
EL‐LEDs,
first
report
devices
based
on
Advanced Functional Materials,
Год журнала:
2024,
Номер
34(40)
Опубликована: Июль 10, 2024
Abstract
Thermally
activated
delay
fluorescence
(TADF)
has
great
potential
for
information
encryption,
temperature
detection,
and
bioimaging
due
to
its
long‐lived
luminescence,
temperature‐sensitive
high
signal‐to‐noise
ratio.
However,
it
is
still
a
challenge
establish
TADF
in
aqueous
environments.
In
this
study,
the
composite
with
(M‐FNCDs)
prepared
using
fluorine‐nitrogen
co‐doped
carbon
dots
(FNCDs)
melamine.
It
worth
mentioning
that
M‐FNCDs
show
stable
under
long‐wavelength
excitation
(470
nm)
Moreover,
distinctive
temperature‐responsive
properties
exhibit
good
linear
relationships
range
of
77–370
K.
Simultaneously,
suspension
as
ink
utilized
realize
encryption/decryption
their
afterglow
cannot
be
quenched
an
solution.
More
importantly,
biocompatibility
can
target
mitochondria
lysosomes
living
cells,
first
time
achieve
ratio
low
background
signal
imaging
organelles.
This
work
proposes
new
strategy
prepare
solutions
extend
material
applications
future.
Small Structures,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 17, 2025
Carbon
dots
(CDs)
are
fluorescent
carbon
nanomaterials
that
considered
for
applications
in
optoelectronics,
sensorics,
and
biofields
due
to
their
low‐cost
robust
synthesis,
versatile
optical
properties.
Herein,
it
is
demonstrated
how
chemical
functionalization
of
hydrophilic
or
amphiphilic
CDs
with
polyethylene
glycol
influences
energy
level
structure
hence
the
emission
Functionalization
results
an
increase
quantum
yield:
from
30%
75%
20%
25%
CDs.
The
estimated
absolute
values
levels,
including
highest
occupied
molecular
orbital
lowest
unoccupied
energies,
dependent
on
composition
size
Moreover,
glycol‐functionalized
CD
can
form
good
quality
films
based
composite
polyvinylcarbazole
(PVK),
together
intense
crucial
light‐emitting
diode
(LED)
fabrication.
By
studying
spectral
properties
fabricated
CD‐LEDs,
shown
electroluminescence
(EL)
originates
mixed
levels
PVK
composite,
resulting
shifting
EL
maximum
blue
green
during
several
seconds
LED
operation.
optimized
CD‐LEDs
show
brightness
up
2600
cd
m
−2
.
Nano Letters,
Год журнала:
2024,
Номер
24(28), С. 8702 - 8708
Опубликована: Июль 2, 2024
Quasi-2D
perovskites
based
blue
light-emitting
diodes
(LEDs)
suffer
from
its
poor
electroluminescence
performance,
mainly
caused
by
the
nonradiative
recombination
in
defect-rich
low-
Journal of Materials Chemistry A,
Год журнала:
2024,
Номер
12(34), С. 22417 - 22441
Опубликована: Янв. 1, 2024
We
provide
an
overview
of
recent
advances
in
the
structure,
preparation,
and
optical
properties
various
quantum
dots
(QDs),
discuss
strategies
for
improving
electroluminescence
performance
response
to
current
challenges
QD
research.
Journal of Materials Chemistry C,
Год журнала:
2024,
Номер
unknown
Опубликована: Янв. 1, 2024
Sulfur
doping
regulates
the
bandgap
of
carbon
dots,
and
time-dependent
afterglow
color
emission
is
realized
in
a
dot-based
composite
via
multiple
triplet
emissions
with
distinct
lifetimes.
