Luminescence,
Journal Year:
2024,
Volume and Issue:
39(7)
Published: July 1, 2024
Liquid
silicon-based
carbon
dots
(CDs)
with
a
photoluminescence
quantum
yield
(PLQY)
of
50%
were
prepared
using
N-[3-(trimethoxysilyl)propyl]ethylenediamine
(DAMO),
citric
acid,
and
n-butylamine
as
raw
materials.
Firstly,
the
optimized
characters
have
been
determined,
namely,
optimal
DAMO,
addition
amounts
1
mL,
0.9
g,
reaction
time
3
h,
temperature
160°C.
Further
research
has
confirmed
that
increase
in
fluorescence
intensity
CDs
is
mainly
due
to
introduction
which
two
amino
groups
DAMO
play
major
role.
In
addition,
Si-O-Si
group
generated
by
hydrolysis
siloxane
connected
surface
forms
core-shell
structure,
modifies
defects
on
enhances
CDs.
Finally,
luminescent
solar
concentrators
(LSCs)
based
liquid
assembled
spin
coating.
The
obtained
device
transparency
up
80%
an
optical
efficiency
2.4%.
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.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 23, 2024
Abstract
Highly
luminescent
carbon
dots
(CDs)
have
garnered
significant
attention
and
are
increasingly
utilized
in
various
fields.
Despite
its
importance,
there
has
been
a
lack
of
comprehensive
reviews
focusing
specifically
on
highly
CDs.
It
is
aimed
here
to
fill
that
gap
by
exploring
CDs
with
high
photoluminescence
quantum
yield
(PLQY),
starting
an
examination
the
mechanisms
underlying
The
selection
synthetic
raw
materials
preparation
methods
along
research
progress
reviewed
information
across
bands
then
statistically
summarized
several
tables.
Subsequently,
structural
features,
synthesis
methods,
purification
strategies
lead
PLQY
based
analyzing
collected
examples
Furthermore,
luminescent‐based
multifunctional
applications
bioimaging,
light‐emitting
diodes,
solar
concentrators,
lasers
introduced.
Finally,
current
landscape
evaluated,
existing
challenges
identified,
feasible
directions
proposed
for
future
development.
Applied Physics Letters,
Journal Year:
2025,
Volume and Issue:
126(4)
Published: Jan. 27, 2025
Carbon
dots
(CDs)
offer
several
advantages,
including
non-toxicity,
facile
synthesis,
high
fluorescence
efficiency,
and
large
Stokes
shift,
rendering
them
up-and-coming
candidates
for
luminescent
solar
concentrators
(LSCs).
However,
the
inherently
weak
light
absorption
of
CDs
significantly
hinders
LSC
performance.
Here,
by
modifying
space-confined
vacuum
heating
method,
we
synthesized
quantum
yield
with
increased
size
improved
cross
section
(up
to
2.7
times
greater
than
smaller
counterparts),
which
was
elucidated
size-dominated
non-resonant
mechanism.
The
enhanced
absorptivity
at
reduced
concentration
demonstrated
mitigate
aggregation-induced
quenching
effectively.
Furthermore,
designed
a
multi-film
coating
structure
block
recycle
transmitted
harmful
ultraviolet
short-wavelength
blue
through
optical
interference,
thereby
fully
exploiting
this
‘useless’
waveband.
By
optimizing
both
CD
recycling,
fabricated
80
×
2.5
mm3
device
achieved
record-high
external
efficiency
9.6%,
while
still
maintaining
71%
average
visible
transmittance.
This
work
proves
substantial
potential
enhancing
CD-based
devices
from
perspective
absorption.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 21, 2025
Abstract
Carbon
dots
(CDs)
are
emerging
as
promising
nanomaterials
for
next‐generation
white
electroluminescent
devices
due
to
their
high
photoluminescence
quantum
yield
(PLQY),
broad
emission
spectrum,
and
compatibility
with
solution‐processed
methods.
However,
current
CD‐based
light‐emitting
diodes
(CDs‐WLEDs)
heavily
rely
on
costly
commercial
host
materials
struggle
low
color
rendering
index
(CRI).
Herein,
a
“dual‐phase
CDs
emitter”
strategy
is
introduced
achieve
full‐spectrum
light
emission,
without
employing
materials.
As
proof
of
concept,
synthesized
broadband
green
nearly
100%
PLQY.
Spectroscopic
structural
analyses
confirm
that
luminescence
originates
from
molecular
state
emission.
By
combining
these
carbon
dot
organic
frameworks
capable
dual
blue
red
emissions,
successfully
produced
record
CRI
94
coordinates
(0.32,
0.34).
This
approach
provides
cost‐effective
efficient
pathway
developing
high‐performance
WLEDs
exclusively
CDs.
