Materials Chemistry Frontiers,
Journal Year:
2023,
Volume and Issue:
8(9), P. 2029 - 2055
Published: Sept. 27, 2023
Lead
halide
perovskite
quantum
dots
(PQDs)
are
considered
to
be
one
of
the
most
promising
classes
photoactive
materials
for
solar
cells
due
their
prominent
optoelectronic
properties
and
simple
preparation
techniques.
Even
though
high
resistivity
these
PQDs
toward
defect
formation
results
in
compelling
optical
manifestation
device
applications,
they
not
free
from
defects,
photoluminescence
yield
is
often
unity.
Defects
ligands
at
surface
play
a
critical
role
charge
transport
non-radiative
recombination,
which
lowers
cell
efficiency
stability.
Therefore,
understanding
defects
developing
effective
passivation
routes
achieving
advances
performance.
In
this
review,
we
focus
on
engineering
CsPbX3
PQDs,
including
vacancy
ligand
modification
then
summarize
corresponding
strategy
systematically
improving
performance
PQD
cells.
At
end,
brief
summary
perspective
presented
looking
forward
future
development
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 1, 2024
Abstract
Wide‐bandgap
(WBG)
(
E
g
≥
1.65
eV)
perovskite
solar
cells
(PSCs)
made
from
mixed‐halide
strategy
experience
severe
photo‐induced
halide
segregation,
leading
to
detrimental
effects
on
the
long‐term
operational
stability.
Developing
single‐halogen
WBG
perovskites
can
be
fundamental
solution
prevent
segregation.
In
this
review,
recent
advances
in
PSCs,
focusing
cesium
(Cs)‐based
pure‐iodide
(I)
and
all
pure‐bromine
(Br)
species
is
summarized.
A
detailed
discussion
conducted
crystallization
dynamics
of
different
systems.
The
key
challenge
for
PSCs
huge
energy
loss
due
inferior
interfacial
level
alignment
high
defect
density
films,
which
greatly
hinders
efficiency
improvement.
To
end,
it
systematically
discuss
optimization
strategies,
including
regulating
crystallization,
passivating
defects,
achieving
aligned
levels,
eliminating
microstrain,
enhance
photovoltaic
performance
cells.
Furthermore,
highlighted
that
Cs‐based
pure‐I
encounter
significant
stability
issue
their
low
structural
tolerance
factor,
warranting
substantial
attention.
Finally,
perspectives
are
outlined
suggest
ways
further
advance
development
application
PSCs.
Materials Chemistry Frontiers,
Journal Year:
2023,
Volume and Issue:
8(9), P. 2029 - 2055
Published: Sept. 27, 2023
Lead
halide
perovskite
quantum
dots
(PQDs)
are
considered
to
be
one
of
the
most
promising
classes
photoactive
materials
for
solar
cells
due
their
prominent
optoelectronic
properties
and
simple
preparation
techniques.
Even
though
high
resistivity
these
PQDs
toward
defect
formation
results
in
compelling
optical
manifestation
device
applications,
they
not
free
from
defects,
photoluminescence
yield
is
often
unity.
Defects
ligands
at
surface
play
a
critical
role
charge
transport
non-radiative
recombination,
which
lowers
cell
efficiency
stability.
Therefore,
understanding
defects
developing
effective
passivation
routes
achieving
advances
performance.
In
this
review,
we
focus
on
engineering
CsPbX3
PQDs,
including
vacancy
ligand
modification
then
summarize
corresponding
strategy
systematically
improving
performance
PQD
cells.
At
end,
brief
summary
perspective
presented
looking
forward
future
development
