Efficient Ultraviolet Circularly Polarized Luminescence in Zero‐Dimensional Hybrid Cerium Bromides
Angewandte Chemie International Edition,
Год журнала:
2024,
Номер
63(26)
Опубликована: Апрель 18, 2024
Ultraviolet
circularly
polarized
luminescence
(UV-CPL)
with
high
photon
energy
shows
great
potential
in
light
sources
and
stereoselective
photopolymerization.
However,
developing
luminescent
materials
UV-CPL
performance
remains
challenging.
Here,
we
report
a
pair
of
rare
earth
Ce
Язык: Английский
Amine-Free CsPbBr3 Perovskite Nanoplatelets Produced with Monolayer-Precision Thickness Control
ACS Materials Letters,
Год журнала:
2024,
Номер
6(6), С. 2425 - 2433
Опубликована: Май 20, 2024
Ultrathin
lead
halide
perovskite
nanoplatelets
(NPLs)
can
enable
tunable
emission
across
the
entire
visible
spectrum
of
light.
The
band-gap
tunability
NPLs
does
not
require
composition
engineering,
so
segregation
be
avoided.
However,
their
photoluminescence
quantum
yield
(PLQY)
and
optoelectronic
applications
are
often
hampered
due
to
reversible
protonation
deprotonation
conventional
amine
ligands.
Herein,
we
demonstrate
synthesis
benzenesulfonate-terminated
CsPbBr3
without
use
any
amine,
clarify
nucleation
growth
mechanism.
thickness
amine-free
is
controlled
with
monolayer-level
precision,
thus,
wavelength
tuned
between
437
504
nm.
Amine-free
solely
terminated
by
a
benzenesulfonate
group,
leading
Cs-rich
surface.
exhibit
PLQYs
up
80%,
slow
charge
carrier
relaxation.
This
work
offers
comprehensive
study
surface
chemistry
ligand
dynamics
NPLs.
Язык: Английский
Strategies for Stabilizing Metal Halide Perovskite Light-Emitting Diodes: Bulk and Surface Reconstruction of Perovskite Nanocrystals
ACS Nano,
Год журнала:
2025,
Номер
unknown
Опубликована: Март 7, 2025
Light-emitting
colloidal
lead
halide
perovskite
nanocrystals
(PeNCs)
are
considered
promising
candidates
for
next-generation
vivid
displays.
However,
the
operational
stability
of
light-emitting
diodes
(LEDs)
based
on
PeNCs
is
still
lower
than
those
polycrystalline
films,
which
requires
an
understanding
defect
formation
in
PeNCs,
both
inside
crystal
lattice
("bulk")
and
at
surface.
Meanwhile,
uncontrollable
ion
redistribution
electrochemical
reactions
under
LED
operation
can
be
severe,
also
related
to
bulk
surface
quality
a
well-designed
device
architecture
boost
carrier
injection
balance
radiative
recombination.
In
this
review,
we
consider
reconstruction
by
enhancing
rigidity
rationally
selecting
ligands.
Degradation
pathways
applied
voltage
discussed,
strategies
avoid
undesirable
migration
PeNC
films.
Subsequently,
other
critical
issues
hindering
commercial
application
LEDs
including
toxicity
Pb
perovskites,
scale-up
deposition
design
active-matrix
prototypes
high-resolution
modules.
Язык: Английский
Ultraviolet Circularly Polarized Luminescence: Progress in Chiral Materials and Emerging Applications
Journal of Luminescence,
Год журнала:
2025,
Номер
280, С. 121127 - 121127
Опубликована: Фев. 11, 2025
Язык: Английский
Strong Upconverted Circularly Polarized Emission from a Chiral Tetrahedral Yb/Eu Cage
Dalton Transactions,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 1, 2025
The
heteropolynuclear
chiral
tetrahedral
cages
(Yb/Eu)
4
L
(
R
/
S
-BINAPO)
exhibit
upconverted
circularly
polarized
luminescence
(UC-CPL)
via
a
novel
Yb**
→
T
1
Eu*
upconversion
mechanism.
Язык: Английский
Helical Perovskite Nanowires with Strong Circularly Polarized Luminescence Self-Assembled from Red-Emitting CsPbI3 Quantum Dots Following Chiral Ligand Exchange
ACS Nano,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 1, 2025
Circularly
polarized
luminescence
(CPL)
of
chiral
perovskite
nanocrystals
is
crucial
for
applications
such
as
spin-polarized
light-emitting
diodes
and
photodetectors.
However,
the
reported
dissymmetry
factors
are
often
too
low
practical
applications;
it
also
important
CPL
wavelengths
to
cover
red
emission
range
display
applications.
Herein,
we
realized
helical
nanowires
self-assembled
from
red-emitting
CsPbI3
quantum
dots
(QDs)
with
a
strong
signal
around
640
nm,
which
was
enabled
by
ligand
R-/S-binaphthyl
phosphoric
acid.
The
formation
QDs
occurred
oriented
attachment;
remaining
in
solution
attached
at
surface
nanowires,
forming
structures.
films
produced
these
demonstrate
high
1.1
×
10-2
2.3
absorption
luminescence,
respectively,
surpassing
many
previously
nanomaterials.
We
employed
multilayer
nanowire
filters,
generating
left-
right-handed
CPL.
Язык: Английский
Efficient Ultraviolet Circularly Polarized Luminescence in Zero‐Dimensional Hybrid Cerium Bromides
Angewandte Chemie,
Год журнала:
2024,
Номер
136(26)
Опубликована: Апрель 18, 2024
Abstract
Ultraviolet
circularly
polarized
luminescence
(UV‐CPL)
with
high
photon
energy
shows
great
potential
in
light
sources
and
stereoselective
photopolymerization.
However,
developing
luminescent
materials
UV‐CPL
performance
remains
challenging.
Here,
we
report
a
pair
of
rare
earth
Ce
3+
‐based
zero‐dimensional
(0D)
chiral
hybrid
metal
halides
(HMHs),
R/S
‐(C
14
H
24
N
2
)
CeBr
7
,
which
exhibits
characteristic
UV
emissions
derived
from
the
5d–4f
transition.
The
compounds
show
simultaneously
photoluminescent
quantum
yields
(32–39)%
large
dissymmetry
factor
(|g
lum
|)
values
(1.3–1.5)×10
−2
.
Thus,
figures
merits
are
calculated
to
be
(4.5–5.8)×10
−3
superior
reported
emissive
materials.
Additionally,
nearly
91
%
their
PL
intensities
at
300
K
can
well
preserved
380
(LED
operating
temperature)
without
phase
transition
or
decomposition,
demonstrating
excellent
structural
optical
thermal
stabilities
Based
on
these
enantiomers,
fabricated
UV‐emitting
CP‐LEDs
exhibit
polarization
degrees
±1.0
%.
Notably,
generated
devices
significantly
trigger
enantioselective
photopolymerization
diacetylene
remarkable
stereoselectivity,
consequently
yield
polymerized
products
anisotropy
factors
circular
dichroism
(g
CD
up
±3.9×10
outperforming
other
as
UV‐polarized
sources.
Язык: Английский
Energy Transfer for Constructing Circularly Polarized Luminescence Materials: Recent Progress and Future Prospects
Advanced Functional Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Ноя. 14, 2024
Abstract
Circularly
polarized
luminescence
(CPL)
materials
hold
significant
promise
in
multidisciplinary
fields
such
as
circularly
organic
light‐emitting
diodes,
biological
probes,
data
storage,
and
information
encryption.
However,
these
cutting‐edge
applications
also
put
forward
higher
requirements
for
the
design
of
CPL
materials,
requiring
large
dissymmetry
factor
high
emission
quality.
For
this
purpose,
diverse
approaches
have
been
explored
to
generate
enhance
emission.
Among
them,
energy
transfer
(ET)
strategy
stands
out
it
can
be
readily
implemented
a
wide
range
materials.
The
present
work
overviews
latest
advances
generating
modulating
CPL,
involving
small
molecules,
polymers,
metal
complexes,
liquid
crystals,
well
new‐emerging
chiral
luminescent
It
is
anticipated
that
review
article
will
garner
increased
attention
toward
systems
facilitate
advancement
Язык: Английский
Semiconductor nanocrystals‐based triplet‐triplet annihilation photon‐upconversion: Mechanism, materials and applications
Deleted Journal,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 24, 2024
Abstract
Triplet‐triplet
annihilation
photon
upconversion
(TTA‐UC)
has
emerged
as
a
promising
strategy
for
enhancing
solar
energy
harvesting
efficiency
by
converting
two
low‐energy,
long‐wavelength
photons
into
high‐energy,
short‐wavelength
photon.
In
recent
years,
semiconductor
nanocrystals
have
gained
significant
attention
efficient
photosensitizers
TTA‐UC
due
to
their
excellent
triplet
transfer
and
the
ability
tune
bandgap
across
spectrum.
This
review
focuses
on
mechanism
of
NC‐based
TTA‐UC,
emphasizing
key
parameters
evaluate
performance
systems.
The
influence
various
material‐related
factors
overall
is
thoroughly
discussed.
Moreover,
advances
in
solid‐state
approaches
are
highlighted,
along
with
an
overview
current
status
applications
this
field.
Lastly,
identifies
challenges
opportunities
that
lie
ahead
future
development
providing
insights
potential
advancements
directions
further
research.
Язык: Английский