ACS Nano,
Journal Year:
2023,
Volume and Issue:
17(20), P. 20013 - 20023
Published: Oct. 3, 2023
Mechanically
deformable
photodetectors
(PDs)
are
key
device
components
for
wearable
health
monitoring
systems
based
on
photoplethysmography
(PPG).
Achieving
high
detectivity,
fast
response
time,
and
an
ultrathin
form
factor
in
the
PD
is
highly
needed
next-generation
PPG
systems.
Self-powered
operation
without
a
bulky
power-supply
unit
also
beneficial
point-of-care
application.
Here,
we
propose
self-powered
PDs
using
heavy-metal-free
Cu-In-Se
quantum
dots
(QDs),
which
enable
high-performance
Although
light-absorbing
QD
layer
extremely
thin
(∼40
nm),
developed
exhibits
excellent
performance
(specific
detectivity:
2.10
×
1012
Jones,
linear
dynamic
range:
102
dB,
spectral
250-1050
nm
at
zero
bias),
comparable
to
that
of
conventional
rigid
QD-PDs
employing
thick
Pb-chalcogenide
layers.
This
attributed
material
strategies─materials
include
QDs,
MoS2-nanosheet-blended
poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)
hole
transport
layer,
ZnO
nanoparticle
electron
Ag
ITO
electrodes,
(∼120
except
electrodes)
mechanical
deformability.
These
allow
successful
application
system
real-time
monitoring,
expanding
their
potential
field
mobile
bioelectronics.
Advanced Functional Materials,
Journal Year:
2022,
Volume and Issue:
33(8)
Published: Dec. 7, 2022
Abstract
Post‐pandemic
era
poses
an
imperative
demand
on
progressive
sensing
devices
whose
performance
largely
relies
the
morphologies
and
structures
of
materials.
Despite
substantial
efforts
advances
that
have
been
made
in
materials
with
different
micro/nanoscale
dimensionalities,
it
is
still
challenging
to
couple
micro/nano
platforms
together
for
precise
scalable
production
high‐performance
sensors
toward
practical
application
scenarios.
Owing
noncontact,
precise,
high‐efficiency
features,
laser
micro/nanofabrication
offers
a
promising
solution
achieve
high‐quality
novel
functionalities
relatively
short
time.
Herein,
this
review
begins
glance
over
development
micro/nano‐structured
briefly
discusses
importance
micro/nanostructuring
technology
micro/nano‐engineering
sensors.
Next,
representative
processing
methods
are
elaborated
detail
from
laser‐pulse‐type
point
view,
potential
applications
chemical,
physical,
biological
targets
based
mechanisms
summarized.
Finally,
perspectives
opportunities
challenges
strategies
micro/nanosensors
presented.
ACS Nano,
Journal Year:
2023,
Volume and Issue:
17(20), P. 20013 - 20023
Published: Oct. 3, 2023
Mechanically
deformable
photodetectors
(PDs)
are
key
device
components
for
wearable
health
monitoring
systems
based
on
photoplethysmography
(PPG).
Achieving
high
detectivity,
fast
response
time,
and
an
ultrathin
form
factor
in
the
PD
is
highly
needed
next-generation
PPG
systems.
Self-powered
operation
without
a
bulky
power-supply
unit
also
beneficial
point-of-care
application.
Here,
we
propose
self-powered
PDs
using
heavy-metal-free
Cu-In-Se
quantum
dots
(QDs),
which
enable
high-performance
Although
light-absorbing
QD
layer
extremely
thin
(∼40
nm),
developed
exhibits
excellent
performance
(specific
detectivity:
2.10
×
1012
Jones,
linear
dynamic
range:
102
dB,
spectral
250-1050
nm
at
zero
bias),
comparable
to
that
of
conventional
rigid
QD-PDs
employing
thick
Pb-chalcogenide
layers.
This
attributed
material
strategies─materials
include
QDs,
MoS2-nanosheet-blended
poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)
hole
transport
layer,
ZnO
nanoparticle
electron
Ag
ITO
electrodes,
(∼120
except
electrodes)
mechanical
deformability.
These
allow
successful
application
system
real-time
monitoring,
expanding
their
potential
field
mobile
bioelectronics.
