Self-cleaning hybrid energy harvester to generate power from raindrop and sunlight

Energy Harvesting Research: The Road from Single Source to Multisource

“…The hybridization of solar and kinetic energy harvesters has induced some novel concepts of energy harvesting solutions in reality. One of the representatives is the hybrid photovoltaic–triboelectric harvester for individually or simultaneously harvesting solar energy and kinetic energy in the form of raindrops . This concept was proposed to deal with the drastically reduced photovoltaic efficiency of solar cells on rainy days.…”

3-Dimensional broadband energy harvester based on internal hydrodynamic oscillation with a package structure

“…An optical photograph of the fabricated device is shown in Figure 1b. For the water-based TENGs, water remaining on the surface can severely degrade the output characteristics and operational stability by statically screening triboelectric charges on the surface [41][42][43][44][45][46]. To overcome these issues, vertically aligned nanowires, which make superhydrophobic and water-repellent surface, were formed on the PTFE films by means of inductively coupled plasma (ICP) etching [47].…”

“…As the water begins to slide on the solid surface, absorbed ions are retained on the solid surface and water acquires excessive conjugate ions. Based on the contactelectrification between water and a solid surface, waterbased TENGs have been developed for the harvesting of ambient water energy from various forms, such as flowing water, [41,42] water drops [43][44][45] and water waves [46]. However, to date, water-based TENGs have relied on naturally provided ambient energy in a water environment directly while not intentionally utilizing the water as the charge-driving source.…”

Implantable Energy‐Harvesting Devices

“…In addition to the design of the structure, researchers optimize the hybrid energy harvesting devices. The hybrid energy harvesters based on the various field couplings include piezoelectric–triboelectric, piezoelectric–electromagnetic, piezoelectric–photovoltaic, piezoelectric–pyroelectric, piezoelectric–pyroelectric–photovoltaic, piezoelectric–biofuel, triboelectric–electromagnetic, triboelectric–electrochemical, triboelectric–photovoltaic, triboelectric–pyroelectric‐photovoltaic, triboelectric–pyroelectric–piezoelectric, and photovoltaic–pyroelectric . In addition, material or structural hybrids, for example, Kevlar microfiber–ZnO nanowires, (BaTi(1− x )Zr x O 3 )–PVDF, ZnO nanowire–PVDF, BaTiO 3 nanowire–PVC fibers, ZnSnO 3 –MWCNTs, ZnSnO 3 nanocube–polymers, grapheme oxide‐ZnO, carbon fiber–ZnO nanowire–paper, and MPP–ZnO have also been used.…”