A Flexible Integrated System Containing a Microsupercapacitor, a Photodetector, and a Wireless Charging Coil

Area of Science:

• Materials Science
• Energy Storage
• Nanotechnology

Background:

• Wearable and portable devices require integrated systems for energy harvesting, storage, and operation.
• Existing integrated systems often lack scalability, cost-effectiveness, or flexibility.

Purpose of the Study:

• To develop a simple, low-cost, and scalable strategy for fabricating a flexible integrated system.
• To demonstrate a system capable of wireless energy transfer, storage, and device operation.

Main Methods:

• Ink printing and electrochemical deposition were employed for fabrication.
• An all-solid-state asymmetric microsupercapacitor (MSC) using MnO2-PPy and V2O5-PANI composites was constructed.
• A photoconductive photodetector based on perovskite nanowires (NWs) and a wireless charging coil were integrated.

Main Results:

• The asymmetric MSC achieved energy densities of 15-20 mWh cm⁻³ at power densities of 0.3-2.5 W cm⁻³ with a 1.6 V potential window.
• The integrated system successfully stored wirelessly transmitted energy in the MSC.
• The MSC powered the perovskite NW photodetector, showing a stable photocurrent response comparable to external power sources.

Conclusions:

• A flexible integrated system with wireless charging, energy storage, and a perovskite photodetector was successfully fabricated.
• The proposed fabrication strategy is simple, scalable, and cost-effective.
• This research offers a valuable approach for developing advanced integrated systems for portable electronics.