Angewandte Chemie,
Journal Year:
2022,
Volume and Issue:
135(8)
Published: Dec. 31, 2022
Abstract
Organic
single
crystals
(OSCs)
with
excellent
flexibility
and
unique
optical
properties
are
of
great
importance
due
to
their
broad
applicability
in
optical/optoelectronic
devices
sensors.
Nevertheless,
fabricating
flexible
OSCs
room‐temperature
phosphorescence
(RTP)
remains
a
challenge.
Herein,
we
propose
host–guest
doping
strategy
achieve
both
RTP
OSCs.
The
single‐stranded
crystal
is
highly
bendable
upon
external
force
application
can
immediately
return
its
original
straight
shape
after
removal
the
stress,
impressively
emitting
bright
deep‐red
phosphorescence.
theoretical
experimental
results
demonstrate
that
arises
from
Förster
resonance
energy
transfer
(FRET)
triphenylene
molecules
dopants.
This
conceptually
synthetically
simple
offers
universal
approach
for
preparation
RTP.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 30, 2025
Abstract
The
recent
discoveries
of
mechanically
flexible
molecular
crystals
have
fuelled
a
resurgence
research
interest
in
piezoelectrics.
This
has
raised
the
quest
to
explore
structure‐property
relations
piezoelectric
crystals,
which
remain
largely
obscure.
Here,
fundamental
structural
features
associated
with
organic
are
explored
relation
their
mechanical
and
supramolecular
flexibility.
Along
electrostatic
properties
such
as
dipole
moments
spontaneous
crystal
polarization,
possible
correlations
coefficients
intermolecular
interaction
topologies
anisotropy
point
toward
link
flexibility
crystals.
In
addition,
roles
packing
efficiency,
lattice
cohesive
energies,
Young's
moduli,
its
from
elastic
tensors
been
examined.
quantitative
overview
suggests
that
response
materials
is
complex
interplay
several
factors.
Based
on
these
analyses
aspects
electromechanical
coupling,
it
becomes
apparent
combining
chirality/polarity
can
be
promising
approach
discovering
soft
piezoelectrics
for
novel
actuators
energy‐harvesting
materials.
Advanced Materials,
Journal Year:
2024,
Volume and Issue:
36(30)
Published: June 4, 2024
Abstract
Emerging
intrinsically
flexible
fully
π‐conjugated
polymers
(FπCPs)
are
a
promising
functional
material
for
optoelectronics,
attributed
to
their
potential
interchain
interpenetration
and
entanglement.
However,
the
challenge
remains
in
obtaining
elastic–plastic
FπCPs
with
intrinsic
robust
optoelectronic
property
excellent
long‐term
cycling
deformation
stability
simultaneously
applications
deep‐blue
polymer
light‐emitting
diodes
(PLEDs).
This
study,
demonstrates
series
of
elastic‐plastic
(P1–P4)
an
energy
dissipation
capacity
via
side‐chain
internal
plasticization
ultra‐deep‐blue
PLEDs.
First,
freestanding
P1
film
exhibited
maximum
fracture
strain
34.6%.
More
interestingly,
elastic
behavior
is
observed
low
(≤10%),
stretched
high
(>10%)
plastic
processing
revealed
realize
absorption
release.
The
exhibits
outstanding
emission,
efficiency
56.38%.
Subsequently,
efficient
PLEDs
fabricated
emission
CIE
(0.16,
0.04)
external
quantum
1.73%.
Finally,
stable
electroluminescence
obtained
from
based
on
stretchable
films
different
strains
deformations,
suggesting
electronics.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 26, 2024
Abstract
Interest
in
flexible
photonics
has
been
motivated
by
the
development
of
artificial
smart
skins.
In
particular,
coupling
and
mechanics
can
offer
opportunities
to
realize
ultrasensitive
strain
sensor,
however,
low‐cost
fabrication
sensing
device
with
desired
photonic
functionality
remains
a
challenge.
Hereby,
study
reports
an
strain‐gauge
sensor
based
on
poly(ethylenenaphthalate
(PEN))/monocrystal
Au/MgF
2
/CsPbBr
3
nanorod/Al
O
/polyacrylonitrile
(in
short
P/mAu/M/CPB@Al
@PAN),
which
are
sensitive
nanoscale
structure
alterations
PEN
substrate
via
stress
response
single‐mode
laser
piezoelectric‐effect.
Wherein
low‐threshold
lasing
(
P
th
≈
170
nJ
cm
−2
)
is
achieved
through
coating
Al
CsPbBr
nanorod,
producing
higher
quality
factor
(Q
1637)
guarantee
much
sensitivity
application.
Reversible
spectral
regulating
≈3
nm
single‐mode‐lasing
wavelength,
subnanometre
scale
resolution
<0.4
wavelength
(S
λ
as
high
160
RIU
−1
,
validated
applied
ranging
from
−1.31%
1.31%.
This
work
not
only
represents
essential
progress
construction
cost‐effective
but
also
lays
foundation
for
potential
application
Angewandte Chemie,
Journal Year:
2022,
Volume and Issue:
135(8)
Published: Dec. 31, 2022
Abstract
Organic
single
crystals
(OSCs)
with
excellent
flexibility
and
unique
optical
properties
are
of
great
importance
due
to
their
broad
applicability
in
optical/optoelectronic
devices
sensors.
Nevertheless,
fabricating
flexible
OSCs
room‐temperature
phosphorescence
(RTP)
remains
a
challenge.
Herein,
we
propose
host–guest
doping
strategy
achieve
both
RTP
OSCs.
The
single‐stranded
crystal
is
highly
bendable
upon
external
force
application
can
immediately
return
its
original
straight
shape
after
removal
the
stress,
impressively
emitting
bright
deep‐red
phosphorescence.
theoretical
experimental
results
demonstrate
that
arises
from
Förster
resonance
energy
transfer
(FRET)
triphenylene
molecules
dopants.
This
conceptually
synthetically
simple
offers
universal
approach
for
preparation
RTP.
