Research Square (Research Square),
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 19, 2025
Abstract
Fluorescent
carbon
dots
(CDs)
have
garnered
significant
attention
for
their
unique
optoelectronic
properties
and
applications,
but
practical
employment
is
hampered
by
the
excessive
synthesis
temperature,
tedious
post-processing
limited
solid-state
luminescence
efficiency.
Herein,
we
develop
a
facile
molten
salt
method
to
achieve
one-step
of
full-color
CDs
with
efficient
emission.
Comprehensively,
kilogram-scale
quantum
yield
90%
can
be
readily
synthesized
via
salt-assisted
approach
under
mild
conditions
(100–142°C)
within
10
minutes.
The
spectral
characterization
density
functional
theory
calculation
confirm
that
zinc
ion
coordination
occur
in
liquated
environment,
which
facilitates
polymerization
precursors
at
lower
temperatures,
suppresses
formation
non-radiative
recombination
channels
on
surface,
further
enhances
solid.
machine
learning
used
optimize
CDs’
luminous
efficiency
up
99.86%,
evoking
excellent
performance
CDs-based
light-emitting
diodes
maximum
156.29
lm
W–1
drive
backlit
display
long-persistent
lifetime
(T95
100
cd
m–2
=
45108.7
h).
This
work
provides
pathway
design
fabrication
advanced
carbon-based
luminescent
materials,
significantly
contributing
advancement
next-generation
lighting
technologies.
