Advanced Science,
Journal Year:
2022,
Volume and Issue:
9(30)
Published: Aug. 24, 2022
Abstract
Carbon
nanodots
(CDs)
have
emerged
as
an
alternative
option
for
traditional
nanocrystals
due
to
their
excellent
optical
properties
and
low
toxicity.
Nevertheless,
high
emission
efficiency
is
a
long‐lasting
pursuit
CDs.
Herein,
CDs
with
near‐unity
are
prepared
via
atomic
condensation
of
doped
pyrrolic
nitrogen,
which
can
highly
localize
the
excited
states
thus
lead
formation
bound
excitons
symmetry
break
π
–electron
conjugation.
The
short
radiative
lifetimes
(<8
ns)
diffusion
lengths
(<50
nm)
imply
that
be
efficiently
localized
by
recombination
centers
defect‐insensitive
By
incorporating
into
polystyrene,
flexible
light‐converting
films
solid‐state
quantum
84%
good
resistance
water,
heating,
UV
light
obtained.
With
CD–polymer
conversion
layers,
CD‐based
white
light‐emitting
diodes
(WLEDs)
luminous
140
lm
W
−1
flat‐panel
illumination
system
lighting
sizes
more
than
100
cm
2
achieved,
matching
state‐of‐the‐art
nanocrystal‐based
LEDs.
These
results
pave
way
toward
carbon‐based
luminescent
materials
technology.
Advanced Functional Materials,
Journal Year:
2023,
Volume and Issue:
33(34)
Published: May 5, 2023
Abstract
It
is
challenging
to
realize
ultra‐pH‐responsive
fluorescent
carbon
dots
(CDs),
especially
reversibly
adjustable
multichromatic
emission
covering
a
broad
wavelength
range
including
deep‐red
lasing.
This
study
reports
one‐step
solvothermal
treatment
of
pyrogallol
obtain
brilliant
CDs
with
substantial
bathochromic
shift
(from
blue
dark
red
emission)
induced
by
pH
changes.
The
show
an
excellent
reversible
response:
simple
acid
instantaneously
shifts
their
initial
green
140
nm
high‐color‐purity
and
enhances
brightness,
subsequent
alkali
addition
returned
the
emission,
suggesting
smooth
regulation
fluorescence.
Detailed
components
analyses,
morphology
tracking,
photodynamic
studies
demonstrate
discrete,
derived
from
structural
transformations,
which
include
protonation
assembly
partial
aggregation
triggered
hydrogen
bonding.
abundant
H‐bonds
crosslink
network
CDs,
ultimately
raising
quantum
yield
11.3%
16.0%.
Furthermore,
aggregated
crystallized
into
sheet‐like
structures
that
acted
as
resonant
cavity
for
lasing
gain
ability
lead
strong
draws
together
regulation,
effects
CD's
assembly,
significant
potential
development
versatile
CDs.
Nano Energy,
Journal Year:
2023,
Volume and Issue:
115, P. 108674 - 108674
Published: July 10, 2023
Carbon
dots
(CDs)
generally
suffer
from
aggregation-induced
fluorescence
quenching
effect
in
solid-state,
which
significantly
limits
their
application
photoelectric
devices.
Due
to
this
effect,
it
is
a
great
challenge
achieve
high-transparency
and
high-performance
luminescent
solar
concentrators
(LSCs)
based
on
CDs.
Here,
the
synthesis
of
organosilane-grafted
carbon
(Si-CDs)
rationally
designed
by
hydrothermal
method
using
anhydrous
citric
acid,
ethanolamine
KH-792
as
reaction
precursors.
The
obtained
Si-CDs
can
be
uniformly
dispersed
polyvinyl
alcohol
(PVA)
matrix
through
dehydration
condensation
hydrogen
bonding
between
silicon
hydroxyl
group
PVA.
Based
property,
Si-CDs/PVA
thin-film
LSCs
(5
×
5
0.2
cm3)
with
ultrahigh
CD
loading
(25
wt%)
high
transparency
fabricated,
exhibiting
excellent
absorption
UV
spectral
region
about
90%
transmission
visible
range.
Furthermore,
power
conversion
efficiency
(PCE)
reach
2.09%
under
standard
light
shows
stability
even
over
12
weeks.
This
synthetic
design
expected
beneficial
for
future
development
paves
way
CDs-based
JACS Au,
Journal Year:
2023,
Volume and Issue:
3(1), P. 25 - 35
Published: Jan. 5, 2023
Luminescent
solar
concentrators
(LSCs)
are
semitransparent
windows
that
able
to
generate
electricity
from
sunlight
absorption.
LSCs
have
shown
huge
promise
for
realizing
building-integrated
photovoltaics
(BIPV).
Unfortunately,
date,
the
power
conversion
efficiency
(PCE)
of
is
still
very
low
which
dramatically
hampers
their
practical
applications.
In
this
Perspective,
We
summarize
and
review
latest
developments
by
looking
at
different
structures.
Among
others,
we
focus
more
on
next
in
field
LSCs,
i.e.,
possibility
high
PCE,
large
area,
mass
production,
durability
needed
future
industrial
development.
hope
promote
application
uniform
testing
standards
draw
attention
development,
toxicity,
durability.
Then,
will
provide
a
critical
assessment
LSCs.
Finally,
challenge
solution
be
discussed.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(36)
Published: March 4, 2024
Abstract
Carbon
dots
(CDs)
are
a
burgeoning
star
of
luminescent
carbon‐based
nanomaterials
with
emerging
interest
for
various
applications.
Luminescence
from
the
sp
2
‐conjugated
domains
in
carbon
cores
is
considered
to
be
intrinsic
bandgap
emission
CDs,
whereas
relationship
between
them
remains
poorly
understood.
Simultaneously,
solvent
relaxation
water
molecules
will
quench
fluorescence
thus,
obtaining
strong
luminescence
CDs
aqueous
solutions
great
challenge.
Herein,
facile
one‐step
spatial‐confined
cross‐condensation
method
that
uses
heat‐induced
self‐foaming
process
ambient
pressure
has
been
developed
synthesize
highly
unprecedented
photoluminescence
quantum
yield
(PLQY)
over
97.2%
water.
The
unique
precursor‐derived
cross‐arranged
perylene
skeleton
hinders
π–π
stacking,
while
hydrophobicity
conjugated
units
mitigates
by
molecules,
resulting
near‐unity
PLQY
solutions,
enabling
this
demonstrate
first
optically
pumped
green
lasing
solution.
Moreover,
biomaterial‐based
white
light
emitting
diode
fabricated
using
CDs‐stained
silks
as
conversion
cover
realize
high
luminous
efficiency
60.7
lm
W
−1
CIE
color
coordinate
(0.33,
0.35).
Carbon Neutralization,
Journal Year:
2024,
Volume and Issue:
3(2), P. 245 - 284
Published: March 1, 2024
Abstract
Carbon
quantum
dots
(CQDs)
have
emerged
as
prominent
contenders
in
the
realm
of
luminescent
nanomaterials
over
past
decade
owing
to
their
tunable
optical
properties,
robust
photostability,
versatile
surface
functionalization
and
doping
potential,
low
toxicity,
straightforward
synthesis
utilizing
environmentally
friendly
precursors.
In
this
review,
we
commence
with
a
concise
introduction,
presenting
both
top‐down
bottom‐up
strategies
for
eco‐friendly
CQDs.
Subsequently,
delve
into
comprehensive
examination
CQDs'
structure
characteristics,
encompassing
ultraviolet–visible
absorption
confinement
effects,
state
emissions
contributing
room‐temperature
photoluminescence
(PL).
This
review
proceeds
elucidate
recent
advancements
modification
CQDs,
specifically
focusing
on
oxidation,
passivation,
incorporation
heteroatoms.
These
serve
afford
control
physicochemical
facilitating
enhancement
PL
through
decoration
highly
visible‐responsive
is
achieved
by
suppressing
nonradiative
recombination
electron‐hole
pairs,
enabling
red/blue
shifts
CQDs
generation
full‐color
emission
spectrum,
regulating
band‐gap
states
broaden
photoabsorption
range.
Finally,
offer
an
overview
most
developments
applications
fluorescent
emphasizing
utility
biomedicine,
sensors,
lighting,
displays,
well
photocatalysis.
Advanced Science,
Journal Year:
2024,
Volume and Issue:
unknown
Published: July 18, 2024
Abstract
Carbon
dots
(CDs)
are
an
emerging
class
of
nanomaterials
with
attractive
optical
properties,
which
promise
to
enable
a
variety
applications.
An
important
and
timely
question
is
whether
CDs
can
become
functional
sustainable
alternative
incumbent
nanomaterials,
notably
inorganic
quantum
dots.
Herein,
the
current
CD
literature
comprehensively
reviewed
as
regards
their
synthesis
function,
focus
on
sustainability
aspects.
The
study
quantifies
why
it
that
be
synthesized
biomass
sole
starting
material
free
from
toxic
precious
metals
critical
raw
materials.
It
further
describes
analyzes
employed
pretreatment,
chemical‐conversion,
purification,
processing
procedures,
highlights
issues
usage
solvents,
energy
efficiency,
safety
waste
management.
specially
shown
many
reported
methods
concerningly
wasteful
utilization
non‐sustainable
solvents
energy.
finally
recommended
future
studies
should
explicitly
consider
discuss
environmental
influence
selected
material,
generated
byproducts,
quantitative
information
required
amounts
consumables,
provided
evaluation
presented
in
upscaled
context.
ACS Nano,
Journal Year:
2024,
Volume and Issue:
18(32), P. 20957 - 20979
Published: Aug. 1, 2024
Multifunctional
micro-/nanomaterials
featuring
functional
superiority
and
high
value-added
physicochemical
nature
have
received
immense
attention
in
electrochemical
energy
storage.
Microfluidic
synthesis
has
become
an
emergent
technology
for
massively
producing
multifunctional
with
tunable
microstructure
morphology
due
to
its
rapid
mass/heat
transfer
precise
fluid
controllability.
In
this
review,
the
latest
progresses
achievements
microfluidic-synthesized
are
summarized
via
reaction
process
intensification,
micro-/nanostructural
engineering
storage
applications.
The
intensification
mechanisms
of
various
micro-/nanomaterials,
including
quantum
dots
(QDs),
metal
materials,
conducting
polymers,
metallic
oxides,
polyanionic
compounds,
metal–organic
frameworks
(MOFs)
two-dimensional
(2D)
discussed.
Especially,
structural
principles
as-fabricated
such
as
vertically
aligned
structure,
heterostructure,
core–shell
microsphere,
introduced.
Subsequently,
application
as-prepared
is
clarified
supercapacitors,
lithium-ion
batteries,
sodium-ion
all-vanadium
redox
flow
dielectric
capacitors.
Finally,
current
problems
future
forecasts
illustrated.
Small,
Journal Year:
2024,
Volume and Issue:
20(29)
Published: Feb. 11, 2024
Abstract
In
recent
years,
carbon
dots
(CDs)
have
garnered
increasing
attention
due
to
their
simple
preparation
methods,
versatile
performances,
and
wide‐ranging
applications.
CDs
can
manifest
various
optical,
physical,
chemical
properties
including
quantum
yield
(QY),
emission
wavelength
(Em),
solid‐state
fluorescence
(SSF),
room‐temperature
phosphorescence
(RTP),
material‐specific
responsivity,
pH
sensitivity,
anti‐oxidation
oxidation,
biocompatibility.
These
be
effectively
regulated
through
precise
control
of
the
CD
process,
rendering
them
suitable
for
diverse
However,
lack
consideration
given
each
feature
during
process
poses
a
challenge
in
obtaining
requisite
features
This
paper
is
analyze
existing
research
present
novel
concepts
ideas
creating
with
different
distinct
The
synthesis
methods
are
discussed
first
section,
followed
by
comprehensive
overview
important
modification
strategy.
Subsequently,
application
reviewed.
Finally,
outlines
current
challenges
controlling
applications,
discusses
potential
solutions,
offers
suggestions
future
research.
