This paper describes two highly-sensitive flexible motion sensors (piezoelectric nanogenerators and ultraviolet light emitting diodes based flexible GaN) based on asymmetric polarization created across flexible GaN film and very high correlations of the sensors for precise motion measurement. The operation mechanism is based on piezotronic effect using polarization charges at the interface for tuning the electronic and optoelectronic processes. The nanogenerator showed very high sensitivity (S = 93 at 0.45% under concave bending) and the convex bending led to the decrease of the sensitivity to 24. The electroluminescence intensity also almost linearly decreased with the change of the bending direction, clearly shown in the confocal scanning electroluminescence microscopy images with the bending motion. The two sets of measures showed very high correlations (R² = 0.98 and 0.96 under concave and convex bending, respectively) with very sensitive directional information. This approach makes to recognize the direction of bending as well as to measure the magnitude of the strain for realizing multi-functional, motion detection sensing devices.

本文介绍了两种高度灵敏的柔性运动传感器（压电纳米发电机和基于柔性GaN的紫外发光二极管），该传感器基于在柔性GaN薄膜上产生的不对称极化以及传感器的高度相关性，以进行精确的运动测量。该操作机制基于压电效应，该压电效应在界面处使用极化电荷来调节电子和光电过程。纳米发电机显示出很高的灵敏度（S在凹弯曲时在0.45％时为93 = 93），而凸弯曲导致灵敏度降低到24。随着弯曲方向的变化，电致发光强度也几乎呈线性下降，在共聚焦扫描电致发光显微图像中清楚地显示了弯曲。运动。两组测量值显示了非常高的相关性（在凹弯和凸弯时R ^2分别为0.98和0.96），并且具有非常敏感的方向信息。这种方法可以识别弯曲的方向，并可以测量应变的大小，以实现多功能的运动检测传感设备。