Journal
ADVANCED ENERGY MATERIALS
Volume 12, Issue 30, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202201042
Keywords
self-powered; monolithic; energy suppliers; sustainable; flexible
Categories
Funding
- Research Grants Council of Hong Kong [15320216, 15221320, C5037-18G]
- RGC Senior Research Fellowship Scheme [SRFS2122-5S04]
- National Natural Science Foundation of China [51961165102]
- Shenzhen Science and Technology Innovation Commission [JCYJ20200109105003940, SGDX2019081623220944]
- Hong Kong Polytechnic University [8-8480, 1-CDA5, 1-YXA1, 1-W15V]
- Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices (GDSTC) [2019B121205001]
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This study proposes a self-powered flexible energy supplier that can operate all-day by harvesting and storing energy from sunlight, dim-light, and human body motion. The device design includes organic photovoltaic, triboelectric nanogenerator, and electrochromic supercapacitor, and it possesses in-built features of energy indication, self-modulation, and self-protection.
Self-powered wearable energy suppliers are highly desirable for next-generation smart electronic microsystems. However, it is still challenging to achieve an all-day operating self-powered energy device via the tandem integration strategy. Herein, a tandem self-powered flexible energy supplier (SPFES) is proposed to harvest and store energy from sunlight (outdoor), dim-light (indoor), and human body motion. In this novel device design, two flexible transparent electrodes are shared by three functional components: organic photovoltaic, triboelectric nanogenerator, and electrochromic supercapacitor. Interestingly, the SPFES shows distinctive in-built features including energy indication, self-modulation, and self-protection. When compared to mechanically stacked devices, the SPFES avoids unnecessary encapsulation and external connections, resulting in a thinner device with a higher power-to-weight ratio (up to 110%). The concept of the SPFES paves an elegant route toward designing multi-functional flexible energy-harvest-storage devices for all-day operational wearable applications.
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