Scientific Reports,
Journal Year:
2024,
Volume and Issue:
14(1)
Published: Dec. 28, 2024
The
study
explore
machine
learning
(ML)
techniques
to
predict
temperature-dependent
photoluminescence
(PL)
spectra
in
colloidal
CdSe
nanoplatelets
(NPLs),
leveraging
polynomial
regression
models
trained
on
experimental
data
from
85
270
K
spanning
temperatures
forecast
PL
backward
0
and
forward
300
K.
6th-degree
with
Tweedie
were
optimal
for
band
energy
(
$$B_1$$
)
predictions
up
K,
while
9th-degree
LassoLars
Linear
Regression
regressors
suitable
For
exciton
$$B_2$$
),
the
Lasso
model
of
degree
5
Ridge
4
performed
well
2
Theil-Sen
showed
promise
Furthermore,
a
GA-based
approach
was
utilized
fit
theoretical
Fan
Varshni
equations,
facilitating
comparative
analysis
ML-predicted
curves.
ACS Nano,
Journal Year:
2025,
Volume and Issue:
19(1), P. 1547 - 1556
Published: Jan. 2, 2025
Plasmonic
semiconductors
exhibit
significant
potential
for
harvesting
near-IR
solar
energy,
although
their
mechanisms
of
plasmon-induced
hot
electron
transfer
(HET)
are
poorly
understood.
We
report
a
transient
absorption
study
HET
in
p-Cu7S4/CdS
type
II
heterojunctions.
Near-IR
excitation
the
p-Cu7S4
plasmon
band
at
∼1400
nm
leads
to
ultrafast
into
CdS
conduction
with
time
constant
<150
fs
and
quantum
efficiency
∼0.054%.
The
injected
electrons
remain
an
amplitude-weighted
average
lifetime
1.9
±
0.5
ns,
significantly
longer
than
that
Au/CdS
heterostructures,
suggesting
plasmonic
can
slow
down
charge
recombination
due
presence
bandgap.
excited
does
not
decay
by
coupling
interfacial
transition,
likely
its
energy
mismatch.
This
provides
detailed
mechanistic
understanding
possible
directions
improving
semiconductor
Energy & Fuels,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 14, 2025
Light-driven
hydrogen
generation
from
water
is
a
route
to
carbon-neutral
fuels.
However,
the
integrated
light
absorbers
and
catalysts
must
be
compatible
functional
under
same
conditions.
A
sulfate-functionalized
complex,
[Ni(H2O)(7-PPh2NArSO3)2](NaBF4),
where
PPh2NArSO3
=
4-(3,6-diphenyl-1,3,6-azadiphosphepan-1-yl)benzenesulfonate),
was
synthesized
characterized.
solid-state
structure
single-crystal
X-ray
crystallography
also
reported.
The
electrocatalytic
activity
for
evolution
of
this
complex
in
7:3
H2O:CH3CN
characterized
by
cyclic
voltammetry
controlled
potential
electrolysis,
with
maximum
observed
rate
83
s–1.
Density
theory
used
characterize
favorable
binding
sulfate
functionalities
cadmium
sulfide
quantum
dots.
Experimental
assembly
these
onto
dots
successful.
Both
fast
electron
transfer
light-driven
pH-dependent
were
observed.
Journal of Semiconductors,
Journal Year:
2025,
Volume and Issue:
46(4), P. 042103 - 042103
Published: April 1, 2025
Abstract
The
quantum
confinement
effect
fundamentally
alters
the
optical
and
electronic
properties
of
dots
(QDs),
making
them
versatile
building
blocks
for
next-generation
light-emitting
diodes
(LEDs).
This
study
investigates
how
governs
charge
transport,
exciton
dynamics,
emission
efficiency
in
QD-LEDs,
using
CsPbI
3
QDs
as
a
model
system.
By
systematically
varying
QD
sizes,
we
reveal
size-dependent
trade-offs
LED
performance,
such
enhanced
smaller
but
increased
brightness
stability
larger
under
high
current
densities.
Our
findings
offer
critical
insights
into
design
high-performance
paving
way
scalable
energy-efficient
optoelectronic
devices.
Chemosensors,
Journal Year:
2025,
Volume and Issue:
13(1), P. 20 - 20
Published: Jan. 16, 2025
Sensors
based
on
nanocomposites
of
quantum
dots
(QDs)
and
wide-gap
metal
oxides
are
exceptional
interest
for
photoactivated
detection
toxic
pollutant
gases
without
thermal
heating.
However,
the
class
detecting
has
been
limited
almost
exclusively
to
oxidizing
like
NO2.
Here,
we
designed
a
sensor
selective
primary
alcohols
at
room
temperature
using
CdSe
coupled
SnO2
semiconductor
matrix.
Our
concept
operations
is
photochemical
reaction
via
QD-SnO2
charge
transfer
does
not
involve
chemisorbed
oxygen,
which
traditional
operation
oxide
sensors.
We
demonstrated
an
efficient
response
C1–C4
ppm
concentration
under
photoexcitation
with
yellow
LED
in
absence
signal
from
other
volatile
organic
compounds
(VOCs).
believe
that
proposed
opens
up
new
ways
design
sensors
heating
VOCs.
The Journal of Physical Chemistry Letters,
Journal Year:
2025,
Volume and Issue:
unknown, P. 985 - 990
Published: Jan. 21, 2025
The
coupling
between
excitons
in
semiconductors
or
molecules
and
metal
nanoparticles
has
been
well-studied,
primarily
for
their
ground
electronic
state.
However,
less
attention
given
to
exciton-nanoparticle
interactions
when
the
nanoparticle
generates
surface
plasmons
upon
incident
excitation.
In
this
study,
we
explore
energy
transfer
dynamics
an
exciton
plasmon
of
a
nanoparticle,
forming
"plexciton".
Significant
mutual
exchange
leads
unexpected
effects
on
lifetime
strength.
interaction
at
varying
wavelengths,
orientations,
magnitudes,
phases
was
studied.
Our
results
show
that
decay
rate
can
be
quenched
entirely
plasmon's
compensates
radiative
decay,
even
separation
distances
several
hundred
nanometers.
These
findings
highlight
impact
dynamics,
opening
new
possibilities
enhancing
charge
carrier
coupled
systems.
