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An ultrahigh energy‐harvesting efficiency of 11.8% is achieved from water drops by using a novel “charge‐trapping‐based electricity generator (CTEG)”. In article number 2001699, Hao Wu, Guofu Zhou, Frieder Mugele, and co‐workers show that with electrowetting‐induced trapped charges, a milliamp‐level electric current is generated from a water drop impacting onto a CTEG device. They demonstrate successful...
Strategies toward harvesting energy from water movements are proposed in recent years. Reverse electrowetting allows high efficiency energy generation, but requires external electric field. Triboelectric nanogenerators, as passive energy harvesting devices, are limited by the unstable and low density of tribo‐charges. Here, a charge trapping‐based electricity generator (CTEG) is proposed for passive...
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