Tribocharging is utilized in a large number of applications and is meanwhile hazardous. Controlling of the charging and the following discharging during the friction contacts is urgently needed. Here, the triboluminescence has first been investigated and we found that the position reversal of the friction pairs has a dramatic impact on the triboluminescence. Such a position dependence was then explained by the combined effect of the contact potential difference and the temperature difference between the contacting surfaces on the charge transfer during the friction process. This work may provide a new perspective for understanding the tribocharging process and may propose a simple yet effective approach to modulate the intensities of tribocharging and tribodischarging.

摩擦充电在许多应用中都被利用，并且同时也是危险的。迫切需要控制摩擦接触期间的充电和随后的放电。在这里，首先研究了三荧光发光，我们发现摩擦副的位置反转对三荧光发光有很大的影响。然后，通过在摩擦过程中接触电位差和接触表面之间的温度差对电荷转移的综合作用来解释这种位置依赖性。这项工作可以为理解摩擦充电过程提供一个新的视角，并且可以提出一种简单而有效的方法来调节摩擦充电和摩擦放电的强度。