Accounts of Chemical Research,
Journal Year:
2024,
Volume and Issue:
57(19), P. 2928 - 2939
Published: Sept. 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
Nano Letters,
Journal Year:
2024,
Volume and Issue:
24(9), P. 2904 - 2911
Published: Feb. 22, 2024
Carbon
dots
(CDs)
are
promising
luminescent
emission
layer
materials
for
next
generation
electroluminescent
light
emitting
diodes
(EL-LEDs)
due
to
their
many
advantages,
such
as
environmental
friendliness,
low
cost,
and
high
stability.
However,
limited
by
the
spin-forbidden
properties
of
triplet
transition,
it
is
difficult
improve
external
quantum
efficiency
(EQE)
fluorescent
CDs-based
EL-LEDs.
Meanwhile,
traditional
thermally
activated
delayed
(TADF)
CDs
prepared
using
coating
strategies
utilize
in
EL-LEDs
nonconductivity
agent.
Herein,
we
successfully
developed
matrix-free
TADF
with
yellow
achieved
a
device
EQE
5.68%,
which
highest
value
reported
In
addition,
also
white
an
1.70%.
This
study
highlights
importance
interactions
between
precursors
modulating
electroluminescence
emitters
provides
effective
design
principle
CDs.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 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
Small Methods,
Journal Year:
2023,
Volume and Issue:
8(1)
Published: Oct. 27, 2023
Abstract
Carbon
dots
(CDs),
as
emerging
long
afterglow
luminescent
material,
have
attracted
the
attention
of
researchers
and
become
one
hot
topics
in
materials.
In
recent
years,
obtained
a
series
CDs‐based
materials
with
different
properties
utilizing
matrix‐assisted
self‐protective
methods.
To
meet
diverse
application
needs,
development
multicolor
is
focus
challenge
this
field.
Most
previously
reported
generally
emit
blue
or
green
afterglow.
Recently,
some
systems
been
discovered,
emission
range
can
extend
from
ultraviolet
to
near‐infrared.
However,
there
lack
systematic
in‐depth
analysis
regarding
preparation
strategy
luminescence
mechanism
Based
on
this,
review
summarizes
strategies
raw
reaction
parameters.
Then,
mechanisms
are
analyzed
seven
factors,
including
carbonization
degree,
surface
state,
aggregation
temperature
dependence,
excitation
multi‐emission
center,
energy
transfer.
Moreover,
applications
introduced.
Finally,
problems
challenges
field
discussed,
future
directions
analyzed.
