Until now,conventional nanogenerators could only produce electric pulses with relatively low-power densities.Herein,we invent a novel controllable growth technique for two-dimensional(2-D)cuprous oxide(p-Cu2O)single-c...Until now,conventional nanogenerators could only produce electric pulses with relatively low-power densities.Herein,we invent a novel controllable growth technique for two-dimensional(2-D)cuprous oxide(p-Cu2O)single-crystal films,and on this basis,a new concept of 2-D single-crystal film flexoelectric nanogenerators(FENGs)are rationally designed and constructed for the first time,which has the characteristics of long-range order lattice,few grain boundaries and defects.More importantly,the accumulated built-in polarization potential in the bent 2-D p-Cu2O single-crystal film FENGs is in the same orientation as the output electricity,resulting in the first nanogenerator that can output continuous and stable electric signals with high voltage(Voc of 2.8 V),current(Jsc of 11.5μA·cm^(-2))and power density(14.4μW·cm^(-2)),exhibiting great practical application potential for power generation and motion capture.This research breaks new ground and establishes a precedent for high-performance and continuous-output nanogenerators,as well as smart wearable sensors.展开更多
基金supported by National Natural Science Foundation of China (No.21606171)China Postdoctoral Science Foundation (No.2021M691326,2015M580205,and 2017T100160)+1 种基金Natural Science Foundation of Jiangsu Province (BK20211345)Independent Innovation Foundation of Tianjin University (1705).
文摘Until now,conventional nanogenerators could only produce electric pulses with relatively low-power densities.Herein,we invent a novel controllable growth technique for two-dimensional(2-D)cuprous oxide(p-Cu2O)single-crystal films,and on this basis,a new concept of 2-D single-crystal film flexoelectric nanogenerators(FENGs)are rationally designed and constructed for the first time,which has the characteristics of long-range order lattice,few grain boundaries and defects.More importantly,the accumulated built-in polarization potential in the bent 2-D p-Cu2O single-crystal film FENGs is in the same orientation as the output electricity,resulting in the first nanogenerator that can output continuous and stable electric signals with high voltage(Voc of 2.8 V),current(Jsc of 11.5μA·cm^(-2))and power density(14.4μW·cm^(-2)),exhibiting great practical application potential for power generation and motion capture.This research breaks new ground and establishes a precedent for high-performance and continuous-output nanogenerators,as well as smart wearable sensors.
