Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 28, 2025
Abstract
The
high
density
of
surface
states
on
silicon
has
long
impeded
the
development
high‐performance
photodetectors,
leading
to
excessive
dark
leakage
currents
that
adversely
affect
responsivity
and
detectivity.
Herein,
an
all‐solution‐processable
method
is
presented
for
fabricating
photodetectors
through
consecutive
spray‐coating
a
conductive
metal‐organic
framework
(MOF,
Cu
3
(HHTP)
2
)
metallic
Ti
C
MXene
form
van
der
Waals
dual
junctions
substrate.
heterojunction
configuration
facilitates
unidirectional
electron‐hole
separation
within
/Si
interface
with
type
I
band
alignment,
while
leveraging
potential
barrier
difference
between
/Cu
Schottky
junctions.
photodetector
demonstrates
outstanding
photoelectric
performance,
operating
in
self‐powered
mode
specific
detectivity
1.63
×
10
12
Jones
large
1.8
A
W
−1
under
365
nm
illumination.
It
also
exhibits
impressive
on/off
ratio
exceeding
3.9
4
at
incident
light
power
330
µW
cm
−2
.
Additionally,
maintains
excellent
across
broad
wavelength
range
from
700
nm,
spanning
ultraviolet
visible
light,
sets
new
performance
benchmark
MOF‐based
photodetectors.
This
work
introduces
straightforward,
controllable
approach
constructing
high‐quality
semiconductor
surfaces,
enabling
fabrication
optoelectronic
devices
enhanced
performance.
Batteries & Supercaps,
Journal Year:
2024,
Volume and Issue:
7(11)
Published: Aug. 15, 2024
Abstract
Rechargeable
Zn‐air
batteries
offer
the
advantages
of
environmental
friendliness,
safety,
low
prices
and
high
energy
density,
are
highly
valued.
However,
major
challenge
faced
by
rechargeable
nowadays
is
efficiency
due
to
slow
reaction
kinetics
electrocatalyst
at
air
cathode.
Bifunctional
catalysts
key
development
improving
their
overall
performance
long‐term
cycling
stability.
Metal‐organic
framework
(MOF)
materials
have
shown
great
benefits
as
oxygen
electrocatalysts
in
promoting
reduction
(ORR)
evolution
(OER).
This
paper
reviews
recent
advances
three
kinds
MOF
bifunctional
for
batteries.
Additionally,
this
also
discusses
synthetic
design
strategy
composite
derivatives,
concludes
suggesting
application
field
ACS Applied Engineering Materials,
Journal Year:
2024,
Volume and Issue:
2(7), P. 1894 - 1907
Published: June 28, 2024
Fuel
cells
have
emerged
as
a
promising
alternative
to
conventional
energy
sources
due
their
high
conversion
efficiency
and
low
environmental
impact.
However,
the
development
of
efficient
cost-effective
catalysts
for
fuel
cell
electrodes
remains
significant
challenge.
Carbon
quantum
dots
(CQDs)
candidates,
with
unique
electronic
optical
traits,
excellent
electrochemical
activity,
cost-effectiveness.
We
synthesized
CQD
investigated
its
structural
transformation
into
carbon
nanoneedles
through
N
F
codoping,
employing
an
innovative
approach
enhance
efficiency,
particularly
in
field
oxygen
electrochemistry.
This
process
maximizes
defects,
reduces
band
gap
from
2.52
1.34
eV,
enhances
charge
distribution
lattice,
which
facilitates
easy
e–
transfer,
studied
density
functional
theory
analysis.
Notably,
N/F-CQD
catalyst
exhibits
exceptional
durability,
maintaining
∼23
mV
degradation
after
30000
cycles,
showcasing
robustness
prolonged
operational
conditions
finding
suitability
practical
applications.
Moreover,
peak
power
90
mW
cm–2
at
load
current
∼230
mA
under
ambient
pressure
temperature
50–55
°C,
emphasizing
potential
nonmetallic
catalyst.
The
introduction
N/F
codoping
demonstrates
promise
enhancing
behavior,
paving
way
nonmetal
cathodic
reduction
reaction
(ORR)
electrocatalyst
anion-exchange
membrane
It
is
challenging
yet
highly
desirable
to
explore
high-performance
inexpensive
electrocatalysts
toward
advanced
zinc-air
batteries
(ZABs).
Herein,
a
bifunctional
oxygen
electrocatalyst
composed
of
Co9S8
incorporated
into
N-doped
porous
cross-linked
carbon
nanotubes
(denoted
as
Co9S8–NC/NTs)
reported
through
folic
acid-assisted
hydrothermal,
pyrolysis,
and
sulfurization
process.
Owing
the
synergistic
effect
nanoparticles
(NPs),
Co–Nx
active
sites,
three-dimensional
(3D)
network,
Co9S8–NC/NTs
show
enhanced
activity
small
potential
gap
0.72
V.
Moreover,
ZAB
assembled
with
serving
cathode
exhibits
satisfactory
long-term
durability
up
140
h
(840
cycles)
large
power
density
116.6
mW
cm–2.
The
present
study
offers
an
effective
strategy
for
constructing
catalysts
based
on
multielements-functionalized
rechargeable
ZABs.
