Phosphorescent
organic
light-emitting
diodes
(OLEDs)
are
suitable
for
display
and
lighting
applications
due
to
their
superior
luminance
efficiency.
However,
the
strong
efficiency
roll-off
severely
hinders
potential
in
transparent
displays,
virtual
reality,
other
high-luminance-demanding
fields,
which
is
mainly
attributed
severe
triplet–triplet
annihilation
(TTA)
triplet-polaron
quenching
(TPQ).
In
this
study,
by
employing
a
thin
Ag
anode
close
phosphorescent
emitter,
Purcell
factor
over
5
has
been
achieved,
nearly
triple
that
of
conventional
indium
tin
oxide
(ITO)-based
device.
This
enhancement
significantly
accelerates
exciton
decay
rate
reduces
concentration,
thereby
considerably
lowering
incidence
TTA
TPQ.
Meanwhile,
such
devices
capable
eliminating
waveguide
modes,
with
77%
energy
being
coupled
into
surface
plasmon
polariton
(SPP).
A
nanoantenna
array
on
metal
(NAoM),
situated
exterior
anode,
efficiently
extracts
SPP
when
plasmonic
antenna
modes
resonate
gap
within
NAoM.
configuration
yields
an
100%
at
40,000
cd/m2
compared
similar
structures,
providing
promising
avenue
high-luminance
OLED.
Science Advances,
Journal Year:
2023,
Volume and Issue:
9(35)
Published: Sept. 1, 2023
Phototherapeutics
has
shown
promise
in
treating
various
diseases
without
surgical
or
drug
interventions.
However,
it
is
challenging
to
use
inner-body
applications
due
the
limited
light
penetration
depth
through
skin.
Therefore,
we
propose
an
organic
light-emitting
diode
(OLED)
catheter
as
effective
photobiomodulation
(PBM)
platform
useful
for
tubular
organs
such
duodenums.
A
fully
encapsulated
highly
flexible
OLED
mounted
over
a
round
columnar
structure,
producing
axially
uniform
illumination
local
hotspots.
The
biocompatible
and
airtight
can
operate
aqueous
environments
extended
periods,
meeting
essential
requirements
medical
applications.
In
diabetic
Goto-Kakizaki
(GK)
rat
model,
red
delivering
798
mJ
of
energy
reduce
hyperglycemia
insulin
resistance
compared
sham
group.
Results
are
further
supported
by
subdued
liver
fibrosis,
illustrating
immense
potential
OLED-catheter–based
internal
PBM
treatment
type
2
diabetes
other
yet
be
identified.
Journal of Physics Photonics,
Journal Year:
2022,
Volume and Issue:
4(3), P. 032002 - 032002
Published: May 11, 2022
Abstract
Organic
light
emitting
diode
(OLED)
technology
continues
to
make
strides,
particularly
in
display
technology,
with
costs
decreasing
and
consumer
demand
growing.
Advances
are
also
seen
OLED
solid
state
lighting
(SSL)
though
broad
utilization
of
this
is
lagging.
This
situation
has
prompted
extensive
R&D
achieve
high-efficiency
SSL
devices
at
cost-effective
fabrication.
Here
we
review
the
advances
challenges
enhancing
forward
outcoupling
from
OLEDs.
Light
conventional
bottom-emitting
OLEDs
(through
a
transparent
anode)
typically
∼20%,
largely
due
external
losses,
i.e.,
substrate
waveguide
modes,
internal
modes
between
metal
cathode
anode/substrate
interface,
surface
plasmon-polariton
cathode/organic
interface.
We
address
these
major
photon
loss
paths,
presenting
various
extraction
approaches.
Some
approaches
devoid
structures;
they
include
replacing
commonly
used
ITO
anode,
manipulating
refractive
index
and/or
organic
layers,
evaluating
emitters
preferential
horizontal
transition
dipoles.
Other
use
structures
such
as
microlens
arrays,
scattering
layers
patterned
substrates,
well
substrates
buried
that
planarized
by
high
layers.
A
maximal
quantum
efficiency
78%
was
reported
for
white
hemispherical
lens
extract
mode.
on
flexible
addressed,
latter
become
increasing
interest
foldable
displays
decorative
lighting,
plastic
being
evaluated
biomedical,
wearable,
automotive
applications.
Scientific Reports,
Journal Year:
2023,
Volume and Issue:
13(1)
Published: Aug. 28, 2023
Abstract
We
evaluate
the
efficacy
of
antimicrobial
Photodynamic
Therapy
(APDT)
for
inactivating
a
variety
antibiotic-resistant
clinical
strains
from
diabetic
foot
ulcers.
Here
we
are
focused
on
APDT
based
organic
light-emitting
diodes
(OLED).
The
wound
swabs
ten
patients
diagnosed
with
ulcers
were
collected
and
32
comprising
22
bacterial
species
obtained.
isolated
identified
use
mass
spectrometry
coupled
protein
profile
database
tested
antibiotic
susceptibility.
74%
exhibited
adaptive
resistance
to
at
least
one
antibiotic.
All
subjected
procedure
using
an
OLED
as
light
source
16
µM
methylene
blue
photosensitizer.
led
large
reduction
in
all
cases.
For
pathogenic
bacteria,
ranged
1.1-log
>
8
log
(
Klebsiella
aerogenes
,
Enterobacter
cloaca
Staphylococcus
hominis
)
even
high
(MRSA
5-log
reduction).
Opportunistic
bacteria
showed
range
0.4-log
Citrobacter
koseri
Kocuria
rhizophila
.
These
results
show
that
OLED-driven
is
effective
against
pathogens
opportunistic
regardless
drug
resistance.
Journal of Chemical Theory and Computation,
Journal Year:
2024,
Volume and Issue:
20(8), P. 3258 - 3272
Published: April 12, 2024
The
photochemistry
of
nitrophenols
is
a
source
smog
as
nitrous
acid
formed
from
their
photolysis.
Nevertheless,
computational
studies
the
these
widespread
toxic
molecules
are
scarce.
In
this
work,
initial
photodeactivation
Advanced Science,
Journal Year:
2024,
Volume and Issue:
11(26)
Published: April 30, 2024
Abstract
Ir(III)
carbene
complexes
have
been
explored
as
one
of
the
best
blue
phosphors
for
their
high
performance.
Herein,
authors
designed
and
synthesized
a
series
blue‐emitting
(
f
‐ct9a–c),
featuring
fac
‐coordinated
cyano‐imidazo[4,5‐b]pyridin‐2‐ylidene
cyclometalates.
These
exhibit
true‐blue
emission
with
peak
maximum
spanning
448–467
nm,
photoluminescence
quantum
yields
81–88%
recorded
in
degassed
toluene.
Moreover,
OLED
devices
bearing
‐ct9a
‐ct9b
deliver
external
efficiencies
(EQE
max
)
25.9%
30.3%,
together
Commission
Internationale
de
L'Eclairage
(CIE
x,y
coordinates
(0.157,
0.225)
(0.142,
0.169),
respectively.
Remarkably,
‐ct9b‐based
device
displays
an
incredible
EQE
29.0%
at
5000
cd·m
−2
.
The
hyper‐OLED
based
on
ν‐DABNA
exhibits
34.7%
CIE
(0.122,
0.131),
affirming
potentials
achieving
efficient
electroluminescence.
