5 years ago

Photoswitchable Micro-Supercapacitor Based on a Diarylethene-Graphene Composite Film

Photoswitchable Micro-Supercapacitor Based on a Diarylethene-Graphene Composite Film
Mathias Kläui, Dmitry Turchinovich, Klaus Müllen, Qiang Chen, Akimitsu Narita, Mischa Bonn, Hai I. Wang, Zhaoyang Liu, Zoltan Mics
Stimuli-responsive micro-supercapacitors (MSCs) controlled by external stimuli can enable a wide range of applications for future on-chip energy storage. Here, we report on a photoswitchable MSC based on a diarylethene-graphene composite film. The microdevice delivers an outstanding and reversible capacitance modulation of up to 20%, demonstrating a prototype photoswitchable MSC. Terahertz spectroscopy indicates that the photoswitching of the capacitance is enabled by the reversible tuning of interfacial charge injection into diarylethene molecular orbitals, as a consequence of charge transfer at the diarylethene–graphene interface upon light modulation.

Publisher URL: http://dx.doi.org/10.1021/jacs.7b04491

DOI: 10.1021/jacs.7b04491

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