Info
Info

Perovskite Sandwich Generates Energy

News

KAUST researchers develop self-powered photodetector by coupling silicone-based polymers with an organometallic halide perovskite

Autonomy is a much-anticipated feature of next-generation microsystems, such as remote sensors, wearable electronic gadgets, implantable biosensors and nanorobots. Now, a team from KAUST (King Abdullah University of Science and Technology) led by Husam Alshareef, Jr-Hau He and Khaled Salama have developed small standalone devices by integrating maintenance-free power units that produce and use their own fuel instead of relying on an external power source.

Triboelectric nanogenerators (TENGs) capture mechanical energy from their surroundings, such as vibrations and random motion produced by humans, and convert it into electricity. In these tiny generators, frictional contact between materials of different polarity creates oppositely charged surfaces. Repeated friction causes electrons to hop between these surfaces, resulting in electric voltage.

"We exploited this triboelectric effect to harvest energy from simple movements, such as hand clapping, finger tapping and routine hand motion, to drive different types of sensors," says Alshareef.

The researchers have developed a self-powered photodetector by coupling the silicone-based polymer polydimethylsiloxane (PDMS) as a TENG with a material called organometallic halide perovskite. The lead-halide-based material features optoelectronic properties that are desirable in solar cells and LEDs.

To streamline their design and eliminate the need for a motion actuator, He's team fabricated the photodetector using two multilayered polymer-based sheets separated by a small gap. One sheet comprised the perovskite ultrathin film while the other contained a PDMS layer. The gap allowed the team to harness the triboelectric effect when the device was activated by finger tapping.

"The self-powered device showed excellent responsiveness to incident light, especially when exposed to light of low intensity", says Mark Leung, the lead author of the photodetector study. Because of its flexible and transparent polymer components, it also retained its performance after being bent 1,000 times and regardless of the orientation of the incident light.

Pushing the boundaries further, the researchers engineered a wearable self-powered bracelet that can store the converted mechanical energy by combining a carbon-fibre-embedded silicone nanogenerator with MXene microsupercapacitors (pictured above).

They incorporated nanogenerator and miniaturised electrochemical capacitors into a single monolithic device encased in silicone rubber. The leak-proof and stretchable shell provided a flexible and soft bracelet that fully conformed to the body. Fluctuations in the skin-silicone separation altered the charge balance between electrodes, causing the electrons to flow back and forth across the TENG and the microsupercapacitor to charge up.

In addition to exhibiting longer cycle life and short charging time, MXene microsupercapacitors can accumulate more energy in a given area than thin-film and micro-batteries, offering faster and more effective small-scale energy storage units for TENG-generated electricity. When active, the bracelet can use the stored energy to operate various electronic devices, such as watches and thermometers.

"Our ultimate goal is to develop a self-powered sensor platform for personalised health monitoring," says PhD student Qiu Jiang, the lead author of the self-charging band project. The team is now planning to introduce sensors into the system to detect biomarkers in human sweat.

ABB Microgrid To Support Portuguese Island’s Energy Transition
Kia And Hyundai Reveal Solar Charging Technology To Power Eco-friendly Vehicles
New Minister And New Start For Solar In Ireland
Hanwha Q CELLS Supplies Half-cell Modules To Largest Hotel Solar Installation In Stockholm
Kia And Hyundai Plans To Introduce ‘solar Roof’ Charging Technology
The Biggest Solar Show In Ireland 27-28 November
Hanwha Q CELLS’ Deliver Exceptional Performance In Fraunhofer CSP Test
Korean Renewable Energy Potential Takes Centre Stage
ENGIE Signs 25-year PPA With Senegalese Government For Two Solar Projects
Flea-sized Solar Panels Embedded In Clothes Can Charge A Mobile Phone
Minimal Carbon Footprint From Midsummer CIGS Process
University Aims For A Brighter Future With ABB Solar Solutions
BayWa R.e. And LONGi Solar Sign Global Framework Agreement
Cabot Microelectronics Completes Acquisition Of KMG Chemicals
Ascent CIGS Technology Goes Into Space
NREL Identifies Where New Solar Technologies Can Be Flexible
ENGIE Signs 25-year PPA With Senegalese Government For Two Solar Projects
Hanwha Q CELLS Launches Scalable Energy Storage System In Germany
Joint Research By Fraunhofer ISE And Heraeus For High-performance Solar Modules
Eco Energy World Reach Financial Close On 54 MW Of Merchant Solar Projects In Australia
Schletter Group: 1MW Rooftop Project In Jordan On The Grid
New Innovative Solar Light Connecting Off-grid Population
Midsummer Continues Strong Growth
SOLARWATT In-roof Solar Panel Wins 2019 German Design Award

Info
×
Search the news archive

To close this popup you can press escape or click the close icon.
Logo
×
Logo
×
Register - Step 1

You may choose to subscribe to the Solar + Power Magazine, the Solar + Power Newsletter, or both. You may also request additional information if required, before submitting your application.


Please subscribe me to:

 

You chose the industry type of "Other"

Please enter the industry that you work in:
Please enter the industry that you work in:
 
X
Info
X
Info