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
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(7), P. 4913 - 4921
Published: Feb. 6, 2024
Colloidal
quantum
dots
with
lower
surface
ligand
density
are
desired
for
preparing
the
active
layer
photovoltaic,
lighting,
and
other
potential
optoelectronic
applications.
In
emerging
perovskite
(PQDs),
diffusion
of
cations
is
thought
to
have
a
high
energy
barrier,
relative
that
halide
anions.
Herein,
we
investigate
fast
cross
cation
exchange
approach
in
colloidal
lead
triiodide
PQDs
containing
methylammonium
(MA+)
formamidinium
(FA+)
organic
cations,
which
exhibits
significantly
barrier
than
inorganic
cesium
(Cs+)-FA+
Cs+-MA+
systems.
First-principles
calculations
further
suggest
internal
arises
due
lowering
structural
distortions
consequent
decline
attractive
cation–cation
cation–anion
interactions
presence
vacancies
mixed
MA+-FA+
PQDs.
Combining
both
experimental
theoretical
evidence,
propose
vacancy-assisted
model
understand
impact
features
intermolecular
interaction
fewer
ligands.
Finally,
realistic
outcome,
as-prepared
mixed-cation
display
better
photostability
can
be
directly
applied
one-step
coated
photovoltaic
photodetector
devices,
achieving
efficiency
15.05%
using
MA0.5FA0.5PbI3
more
precisely
tunable
detective
spectral
response
from
visible
near-infrared
regions.
Nano-Micro Letters,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: April 11, 2024
Abstract
Although
covalent
organic
frameworks
(COFs)
with
high
π
-conjugation
have
recently
exhibited
great
prospects
in
perovskite
solar
cells
(PSCs),
their
further
application
PSCs
is
still
hindered
by
face-to-face
stacking
and
aggregation
issues.
Herein,
metal–organic
framework
(MOF-808)
selected
as
an
ideal
platform
for
the
situ
homogeneous
growth
of
a
COF
to
construct
core–shell
MOF@COF
nanoparticle,
which
could
effectively
inhibit
aggregation.
The
synergistic
intrinsic
mechanisms
induced
nanoparticles
reinforcing
stability
mitigating
lead
leakage
been
explored.
complementary
utilization
-conjugated
skeletons
nanopores
optimize
crystallization
large-grained
films
eliminate
defects.
resulting
achieve
impressive
power
conversion
efficiency
23.61%
superior
open
circuit
voltage
(1.20
V)
maintained
approximately
90%
original
after
2000
h
(30–50%
RH
25–30
°C).
Benefiting
from
effects
chemical
fixation
adsorption
abilities
nanoparticles,
amount
unpackaged
soaked
water
(<
5
ppm)
satisfies
laboratory
assessment
required
Resource
Conservation
Recovery
Act
Regulation.
Aggregate,
Journal Year:
2024,
Volume and Issue:
5(5)
Published: April 12, 2024
Abstract
The
exceptional
optoelectronic
properties
of
lead
halide
perovskite
nanocrystals
(PeNCs)
in
the
ultraviolet
and
visible
spectral
regions
have
positioned
them
as
a
promising
class
semiconductor
materials
for
diverse
photovoltaic
applications.
However,
their
limited
response
to
near‐infrared
(NIR)
light
due
intrinsic
bandgap
(>1.5
eV)
has
hindered
applications
many
advanced
technologies.
To
circumvent
this
limitation,
it
is
fundamental
significance
integrate
PeNCs
with
lanthanide‐doped
upconversion
nanoparticles
(UCNPs)
that
are
capable
efficiently
converting
low‐energy
NIR
photons
into
high‐energy
photons.
By
leveraging
energy
transfer
from
UCNPs
PeNCs,
synergistic
combination
can
not
only
expand
responsivity
range
but
also
introduce
novel
emission
profiles
luminescence
multi‐dimensional
tunability
(e.g.,
wavelength,
lifetime,
polarization)
under
low‐to‐medium
power
irradiation,
which
breaks
through
inherent
restrictions
individual
thereby
opens
up
new
opportunities
device
engineering.
In
review,
we
focus
on
latest
advancements
development
PeNCs‐UCNPs
nanocomposites,
an
emphasis
controlled
synthesis
optical
design
such
full‐spectrum
solar
cells,
photodetectors,
multilevel
anticounterfeiting.
Some
future
efforts
prospects
toward
active
research
field
envisioned.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 24, 2024
Abstract
Halide‐related
defects
at
the
buried
interface
not
only
cause
nonradiative
recombination,
but
also
seriously
impair
long‐term
stability
of
perovskite
solar
cells
(PSCs).
Herein,
a
bottom‐up,
all‐in‐one
modification
strategy
is
proposed
by
introducing
multisite
antioxidant
ergothioneine
(EGT)
to
manage
iodide
ions
and
manipulate
crystallization
dynamics.
The
findings
demonstrate
that
EGT
passivates
uncoordinated
Sn
4+
/Pb
2+
defects,
firmly
anchors
inhibits
their
oxidation
I
2
.
Additionally,
enhances
oriented
perovskite,
improves
carrier
dynamics,
releases
residual
stresses.
Consequently,
optimized
all‐air
processed
device
(Rb
0.02
(FA
0.95
Cs
0.05
)
0.98
PbI
2.91
Br
0.03
Cl
0.06
achieves
remarkable
power
conversion
efficiency
(PCE)
25.13%,
which
among
highest
values
reported
for
devices
fabricated
in
air,
along
with
ultrahigh
open‐circuit
voltage
(
V
OC
1.191
fill
factor
(FF)
84.9%.
without
encapsulation
exhibits
strong
humidity,
thermal,
operational
under
ISOS
protocol.
Specifically,
initial
retained
90.12%
after
1512
h
thermal
ageing
65
°C
90.14%
930
continuous
maximum
point
tracking
(MPPT)
simulated
AM1.5
illumination.
Chemical Society Reviews,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
This
review
summarizes
the
progress
and
provides
perspectives
on
perovskite
quantum
dot
photovoltaics,
with
a
focus
surface
chemistry
engineering,
paving
new
direction
for
large-area
low-cost
PV
technology
to
address
major
energy
challenges.
Energy & Environmental Science,
Journal Year:
2024,
Volume and Issue:
17(16), P. 5756 - 5794
Published: Jan. 1, 2024
This
review
comprehensively
discusses
the
latest
advances
in
surface
matrix
regulation
of
perovskite
quantum
dots
and
proposes
opportunities
challenges
for
high-performance
solar
cells.
