The Journal of Chemical Physics,
Год журнала:
2024,
Номер
161(23)
Опубликована: Дек. 16, 2024
The
significant
open-circuit
voltage
(VOC)
deficit
poses
a
major
obstacle
to
enhancing
the
efficiency
of
Cu2ZnSn(S,Se)4
(CZTSSe)
solar
cells.
Interface
passivation
emerges
as
potent
strategy
regulate
carrier
transport
and
boost
performance.
Here,
we
innovatively
introduced
rare-earth
lanthanum
(La)
passivate
absorber
interface
by
directly
treating
absorption
layer
surface
with
an
aqueous
La3+
ion
solution.
This
approach
effectively
minimizes
defect
concentrations
mitigates
Fermi-level
pinning
effects.
Notably,
VOC
markedly
increases
from
406
456
mV
after
La
treatment.
Consequently,
power
conversion
soars
6.78%
(VOC
=
mV,
JSC
29.95
mA/cm2,
FF
55.28%)
for
reference
cell
7.89%
451
30.12
59.56%)
optimized
La-processed
cell.
groundbreaking
work
opens
up
novel
avenue
advancing
CZTSSe
performance,
offering
promising
implications
future
thin-film
photovoltaic
technology.
Abstract
The
fabrication
of
kesterite
Cu
2
ZnSn(S,Se)
4
(CZTSSe)
thin‐film
solar
cells
using
the
electrochemical
deposition
(ED),
which
is
valued
for
its
industrial
feasibility,
offers
a
cost‐effective
and
environmentally
friendly
approach
to
carbon‐free
clean
energy
production.
However,
reported
power
conversion
efficiency
approximately
10
%
electrodeposited
CZTSSe
lower
compared
alternative
methods
like
sputtering
spin‐coating,
mainly
attributed
phase
inhomogeneity
rough
morphology
generated
during
ED
process.
Ensuring
microscopic
macroscopic
uniformity
films
crucial
improvement
film
quality
device
performances.
In
this
review,
strategies
address
these
challenges
including
intrinsic
control
such
as
mode,
pH,
concentration
metal
ions,
complexing
agents,
well
extrinsic
approaches
doping,
substitution
elements,
introduction
interfacial
layers.
addition,
prospects
electrochemically
deposited
were
presented,
focusing
on
promising
applications
in
tandem,
flexible,
water‐splitting
devices.
Finally,
review
will
provide
technical
insights
into
process
preparing
cells,
outlining
perspective
future
development
highly
efficient
thin
cells.
Abstract
Ion
doping
is
an
effective
strategy
for
achieving
high‐performance
flexible
Cu
2
ZnSn(S,Se)
4
(CZTSSe)
solar
cells
by
defect
regulations.
Here,
a
Li&Na
co‐doped
applied
to
synergistically
regulate
defects
in
CZTSSe
bulks.
The
quality
absorbers
with
the
uniformly
distributed
Li
and
Na
elements
are
obtained
using
solution
method,
where
acetates
(LiAc
NaAc)
as
additives.
concentration
of
harmful
Zn
anti‐site
decreased
8.13%
after
incorporation,
that
benign
increased
36.91%
incorporation.
Synergistic
co‐doping
enhances
carrier
reduces
interfacial
one
order
magnitude.
As
result,
cell
achieves
power
conversion
efficiency
(
PCE
)
10.53%
certified
10.12%.
Because
high
homogeneous
property,
device
fabricated
large
area
(2.38
cm
obtains
9.41%
.
investigation
provides
new
perspective
efficient
cells.
Advanced Functional Materials,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 27, 2025
Abstract
For
solar
cells,
interfacial
chemical
coordination,
carrier
transport,
and
energy
alignment
play
critical
roles
in
transport
determine
the
final
conversion
efficiency.
As
an
emerging
technology,
high‐efficiency
Sb
2
(S,Se)
3
cells
typically
utilize
cadmium
sulfide
(CdS)
as
electron
layer.
However,
poor
electrical
contact
between
F‐doped
SnO
(FTO)
substrate
CdS
presents
a
significant
challenge
to
improving
device
performance.
Here,
ultrathin
layer
is
introduced,
fabricated
via
bath
deposition,
FTO
address
coordination
problem.
The
non‐invasive
depth
analysis
based
on
synchrotron
radiation
X‐ray
photoelectron
spectroscopy
shows
that
this
engineering
approach
facilitates
formation
of
S‐Sn
bonding
at
FTO/CdS
interface,
which
cannot
be
achieved
conventional
inert
surface.
Additionally,
existence
reduces
sulfur
vacancy
defect
(V
S
)
films,
enhancing
both
conductivity
crystallinity.
Therefore,
cell
demonstrates
significantly
enhanced
separation
Ultimately,
achieve
record
fill
factor
exceeding
73%,
with
championefficiency
10.58%.
This
study
effective
strategy
enhance
charge
properties
for
high‐performance
cells.
Abstract
Alkali
metal
is
the
requirement
for
highly
efficient
Cu
2
ZnSn(S,
Se)
4
(CZTSSe)
solar
cells,
thus
it
crucial
to
additionally
incorporate
alkali
into
absorber
layer
flexible
cells.
However,
efficiency
of
CZTSSe
devices
reported
date,
based
on
conventional
incorporation
strategies,
still
lags
behind
those
made
rigid
substrates.
One
main
issues
inability
control
content
and
distribution
in
layer.
Here,
a
facile
alkaline
approach
proposed,
effectively
regulating
metals
film.
Such
method
can
spontaneously
tailor
proper
level,
leading
suppression
non‐radiative
recombination
better
carrier
transport
through
enhanced
film
quality
optimized
band
binding
structure.
Finally,
champion
cell
with
an
11.88%
achieved,
highest
without
noble
Ag
doping.
This
study
affords
innovative
spontaneous
alkali‐doping
design
preparation
high‐performance
cells
provides
deeper
insight
extent
