Organic Letters,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 25, 2024
An
efficient
dehydrative
coupling
of
propargylic
alcohols
with
diarylphosphine
oxides
to
construct
tetrasubstituted
allenylphosphoryl
compounds
in
the
presence
a
Pd/Brønsted
acid
co-catalyst
has
been
developed.
As
benefit
from
use
Brønsted
acid,
this
reaction
could
perform
under
mild
conditions
excellent
yields,
accommodating
wide
range
functional
groups.
The
potential
utility
method
also
demonstrated.
Advanced Optical Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 21, 2025
Abstract
The
preparation
of
narrow
emission
bandwidth
materials
is
crucial
for
the
development
advanced
organic
light‐emitting
diodes
(OLEDs).
In
this
review
article,
state‐of‐the‐art
methodologies
used
emitters
with
high
color
purity
are
summarized,
and
favorable
design
strategies
rationally
organized.
Currently
OLEDs
have
some
issues,
such
as
device
stabilization
that
must
be
resolved,
should
also
considered.
Given
recent
exponential
growth
in
number
types
narrowband
emissive
organometallic
complexes
exhibiting
multiple‐resonance
thermally
activated
delayed
fluorescence
metal‐to‐ligand
charge
transfer
characteristics,
there
an
urgent
need
to
establish
key
technology
descriptors
purity.
review,
developments
boron,
fused
indolocarbazole,
carbonyl,
phosphine
oxide,
exhibit
spectra
described,
future
directions
advance
performance
devices
suggested.
ACS Materials Letters,
Journal Year:
2024,
Volume and Issue:
6(5), P. 1746 - 1768
Published: April 2, 2024
Narrowband
thermally
activated
delayed
fluorescence
(TADF)
materials
have
received
widespread
attention
due
to
their
promising
applications
in
organic
light-emitting
diodes
with
high-definition
displays.
Great
efforts
been
done
achieve
full-color
narrowband
emissions
donor–acceptor
(D–A)
and
multiple-resonance
(MR)
TADF
materials.
In
comparison
the
D–A
materials,
MR-based
basically
showed
smaller
full
width
at
half-maximum
(fwhm)
of
spectra
owing
inherent
structural
vibration
inhibition
electronic
transition
characteristics.
Herein,
review
summarizes
current
research
progress
on
both
MR
blue,
green
red
emission
regions
fwhm
less
than
70
nm
concentrating
molecular
design
strategies,
photophysical
properties
corresponding
device
performance,
proposes
some
possible
future
topic.
This
aims
give
physical
insight
structure–property
relationship
such
offer
guidance
for
further
developing
provide
a
structured
database
platform
high-throughput
or
machine
learning
research.
Chemical Science,
Journal Year:
2024,
Volume and Issue:
15(28), P. 11053 - 11064
Published: Jan. 1, 2024
A
non-doped
mPPICNC3-based
device,
exhibiting
CIE
coordinates
of
(0.160,
0.032),
achieves
a
record-breaking
EQE
7.67%
and
negligible
efficiency
roll-off
up
to
3300
cd
m
−2
.
Chemical Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 1, 2025
Novel
ultraviolet
to
deep-blue
emissions
are
achieved
in
three
donor–acceptor
materials
with
weak
donors
and
regulated
stacking.
High
efficiency,
low
roll-off
long
operational
lifetimes
obtained
green,
yellow
red
emissive
PhOLEDs.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 18, 2024
Organic
room-temperature
phosphorescent
(RTP)
materials,
especially
with
narrowband
emission
properties,
exhibit
great
potential
for
applications
in
display
and
sensing,
but
have
been
seldom
reported.
Herein,
a
rare
example
of
the
intrinsic
blue
RTP
material
is
fabricated
A
series
indolo[3,2,1-kl]phenothiazine
derivatives,
named
Cphpz,
1O-Cphpz,
2O-Cphpz,
are
designed
synthesized.
Due
to
their
relatively
rigid
structures,
these
three
compounds
showed
deep
emissions
ranging
from
396
434
nm
full
width
at
half
maximum
(FWHM)
31,
26,
31
nm,
respectively.
To
delight,
compound
2O-Cphpz
displayed
448
FWHM
36
long-lived
lifetime
1.08
s
hydroxyethyl
acrylate
acrylic
acid
matrix.
Photophysical
studies,
single
crystal
analyses,
TD-DFT
calculations
performed
elucidate
further
relationships
between
molecular
structures
properties.
Meanwhile,
because
highly
sensitive
humidity,
visualizing
droplet
path
optical
microfluidic
chip
efficiently
through
digital
light
processing
3D
printing.This
work
provides
reliable
strategy
realize
expand
self-monitoring
printed
structures.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
63(47)
Published: Aug. 6, 2024
Abstract
Hole‐transporting
material
(HTMs)
are
crucial
for
obtaining
the
stability
and
high
efficiency
of
perovskite
solar
cells
(PSCs).
However,
current
state‐of‐the‐art
n‐i‐p
PSCs
relied
on
use
2,2′,7,7′‐tetrakis(N,N‐di‐
p
‐methoxyphenylamine)‐9,9′‐spirobifluorene
(spiro‐OMeTAD)
exhibit
inferior
intrinsic
ambient
due
to
‐dopant
hydrophilic
Li‐TFSI
additive.
In
this
study,
a
new
spiro‐type
HTM
with
critical
quasi‐planar
core
(
Z‐W‐03
)
is
developed
improve
both
thermal
PSCs.
The
results
suggest
that
planar
carbazole
structure
effectively
passivates
trap
states
compared
triphenylamine
propeller‐like
conformation
in
spiro‐OMeTAD.
This
passivation
effect
leads
shallower
when
HTMs
interact
Pb‐dimer.
Consequently,
device
using
achieves
higher
V
oc
1.178
spiro‐OMeTAD's
1.155
V,
resulting
an
enhanced
24.02
%.
addition,
double‐column
π
–
stacking
hole
mobility
(~10
−4
cm
2
−1
s
even
without
‐dopant.
Moreover,
surface
interface
modified,
undoped
can
achieve
nearly
23
Compared
spiro‐OMeTAD,
those
under
N
conditions.
superior
performance
attributed
presence
multiple
CH/π
intermolecular
.
π–π
contacts
hopping
transport.
Therefore,
it
imperative
focus
further
molecular
design
optimization
incorporating
cores
moieties
commercialization
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 9, 2025
Abstract
Hybrid
local
and
charge
transfer
(HLCT)
emitters
have
received
much
attention
because
they
can
utilize
triplet
exciton
via
hot
channels.
However,
exploiting
novel
multifunctional
deep‐blue
HLCT
materials
capable
of
high
color
purity
remains
a
great
challenge.
Herein,
two
with
properties,
PdCz‐2CN
mPdCz‐2CN,
aresynthesized.
The
non‐doped
OLED
based
on
or
mPdCz‐2CN
emitter
EQE
max
Commission
Internationale
de
l'Eclairage
(CIE)
coordinates
Y
values
5.42%@0.062
[email protected],
respectively.
More
importantly,
the
doped‐OLEDs
achieve
ultra
emission
CIEy
5.10%@0.037
1.96%@0.050,
respectively,
which
is
close
to
BT.2020
standard.
In
addition,
not
only
obtain
ultra‐deep
blue
OLED,
but
also
realize
exciplex‐OLED
as
electron
acceptor
for
realizing
luminescence.
As
result,
exciplex
PdCz‐2CN:
15
wt.%TAPC
luminescent
layer
achieves
15.44%
forming
green
hole
transport
TAPC.
Moreover,
exciplex‐based
host,
red
phosphor
Ir(MDQ)
2
(acac)
guest
reaches
emission,
isup
20.14%.
This
study
first
using
picolinonitrile
an
acceptor,
having
significant
potential
efficient
applications.
