Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 21, 2024
Ternary
ZnSeTe
quantum
dots
(QDs)
are
regarded
as
the
most
promising
Cd-free
blue
emitters,
while
their
fundamental
optical
properties
such
hot
carrier
(HC)
cooling
process
and
multiphoton
absorption
(MPA)
remain
unclear,
which
will
hinder
potential
application.
In
this
work,
we
compare
HC
processes
of
ZnSeTe/ZnSeS
ZnSeTe/ZnSeS/ZnS
QDs
find
that
times
insensitive
to
excitation
intensity
a
result
suppressed
hot-phonon
bottleneck
Auger
effect.
Importantly,
have
determined
two-
five-photon
cross
sections
two
kinds
QDs,
highlighting
advantages
ZnS
shells
in
enhancing
MPA
ZnSeTe-based
QDs.
These
insightful
findings
shed
light
on
underlying
emphasize
critical
role
shell
engineering
performance.
Nano Letters,
Journal Year:
2024,
Volume and Issue:
24(15), P. 4454 - 4461
Published: April 4, 2024
Colloidal
quantum
well
(CQW)
based
light
emitting
diodes
(LEDs)
possess
extra-high
theoretical
efficiency,
but
their
performance
still
lags
far
behind
conventional
LEDs
due
to
severe
exciton
quenching
and
unbalanced
charge
injection.
Herein,
we
devised
a
gradient
composition
CdxZn1–xS
shell
address
these
issues.
The
epitaxial
with
was
achieved
through
controlling
competition
between
Cd2+
Zn2+
cations
preferentially
bind
the
anions
S2–.
Thus,
suppressed
greatly
by
passivating
defects
reducing
nonradiative
recombination,
thereby
achieving
near-unity
photoluminescence
yield
(PLQY).
energy
level
of
reduced
hole
injection
barriers
increased
efficiency
balance
LEDs.
As
result,
high
external
(EQE)
22.83%,
luminance
111,319
cd/m2
long
operational
lifetime
(T95@100
cd/m2)
over
6,500
h,
demonstrating
state-of-the-art
for
CQW
Nano Letters,
Journal Year:
2024,
Volume and Issue:
24(44), P. 14066 - 14072
Published: Oct. 28, 2024
ZnSeTe
quantum
dots
(QDs)
offer
an
efficient
avenue
for
realizing
heavy-metal-free
light-emitting
diodes
(LEDs)
that
meet
the
Rec.2100
blue
standard.
Synthetic
core-shell
engineering
has
enabled
big
advances
in
external
efficiency
(EQE)
of
QD-LEDs.
However,
mechanisms
behind
degradation
operational
stability
QD-LEDs
remain
relatively
unexplored.
In
this
study,
we
explore
impact
ligand
density
and
composition
on
both
material
device
stability.
We
developed
a
solid-film
exchange
utilizing
inorganic
X-type
(zinc
chloride),
revealing
substitution
ligands
organic
counterparts
significantly
influences
materials
devices.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 13, 2025
Abstract
Large
ZnSe
quantum
dots
(QDs)
with
an
emission
peak
≈450
nm
hold
significant
promise
for
display
technologies.
However,
achieving
efficient
pure‐blue
through
the
enlargement
of
nanocrystals
remains
a
challenge.
In
this
study,
breakthrough
is
reported
in
growing
large‐size
QDs
well
beyond
exciton
Bohr
radius
Yb
3+
doping
strategy.
reduces
surface
energy
(220)
crystal
plane
and
alleviates
interface
strain
ZnSe/ZnS
structure,
enabling
to
grow
larger
while
maintaining
enhanced
stability.
The
resulting
Yb:
exhibit
at
453
nm,
full
width
half
maximum
(FWHM)
46
high
photoluminescence
yield
(PLQY)
67.5%.
When
integrated
into
dot
light‐emitting
diodes
(QLEDs),
devices
electroluminescence
(EL)
455
external
efficiency
(EQE)
1.35%,
luminance
1337.08
cd
m
−2
.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 24, 2025
Abstract
Little
is
known
about
the
nucleation
and
growth
(N/G)
of
colloidal
semiconductor
quantum
dots
(QDs)
from
prenucleation
clusters
(PNCs)
in
dispersion
at
room
temperature.
Here,
we
show
that
when
a
pre‐heated
sample
ZnSe
(containing
PNC
no
QDs)
dispersed,
N/G
QDs
occurred.
When
added
to
QDs,
either
became
larger
or
kept
intact
with
smaller
seen.
The
associated
monomer
addition
QD
dissolution
sometimes,
two
intrinsic
energy
barriers
which
increase
size.
We
use
temperatures,
T
2
1
,
symbolize
barriers,
respectively.
than
.
Our
findings
suggest
monomers
provided
by
PNC,
grow
size‐focusing
regime
25
°C
(
3
);
larger,
occurs.
consumed
completely,
size‐defocusing
(Ostwald
ripening)
as
approaches
),
stop
growing.
study
brings
fundamental
understanding
plays
significant
role
size
distribution
QDs.
The Journal of Physical Chemistry Letters,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1045 - 1050
Published: Jan. 22, 2025
Developing
heavy-metal-free
materials
with
wide
tunable
emission
is
important
to
light-emitters.
The
alloying
method
utilized
in
ZnSe
magic
size
clusters
(MSCs)
Te
form
ZnSeTe
and
manipulate
the
band
gap
structure
ZnSe.
growth
of
ZnTe
on
alloyed
quantum
dots
(QDs)
forms
ZnSeTe/ZnTe
core/shell
nanostructures,
showing
photoluminescence
peak
from
450
760
nm
different
thicknesses
shell.
This
record
range
310
full
visible
near-infrared
spectra
based
zinc
chalcogenide
nanostructures.
Further
coating
thin
ZnS
shell
nanostructures
significantly
improves
stability
yield
nanoparticles.
work
offers
a
new,
cadmium-free
material
choice
for
optoelectronic
devices
aligning
environmental
performance
requirements
modern
applications.
Inorganic Chemistry,
Journal Year:
2025,
Volume and Issue:
64(6), P. 3111 - 3119
Published: Jan. 31, 2025
Indium
phosphide
(InP)
nanocrystals
(NCs)
have
garnered
significant
attention
for
displays
and
bioimaging
due
to
their
superior
optical
properties
low
toxicity.
However,
the
high
cost
operational
risks
associated
with
colloidal
synthesis
of
InP
NCs
hinder
widespread
development
application.
In
this
study,
we
presented
a
green
method
using
solid
ammonium
hypophosphite
((NH4)H2PO2)
as
an
economical
safe
phosphorus
precursor.
(NH4)H2PO2
was
decomposed
controllably
produce
highly
reactive
gaseous
phosphine
(PH3)
through
precise
temperature
management.
The
released
PH3
then
reacted
indium
carboxylate
form
clusters,
which
serve
intermediate
precursors.
This
cluster-assisted
endowed
continuous
supply
monomers
nucleation
growth
high-quality
uniform
size
distribution.
Following
surface
treatment
that
balances
etching
passivating
capabilities,
exhibited
narrow
emission
line
width
46
nm
near-unity
photoluminescence
quantum
yield
(PLQY),
representing
one
best
performances
shell-less
NCs.
stable
nature
raw
materials
used
in
approach
opens
pathway
