Abstract In the present communication, the conductivity of the single crystal methylammonium lead bromide as a function of temperature is studied. As a result, the activation energies for the dark/light conditions were determined. Interestingly, when the light illumination is applied, depending of the applied bias voltage, the complex conductivity response on the temperature changes was observed. Depending on the electrical field applied, the material follows two behaviors: first is typical of semiconductors and the second one and non-Arrhenian behavior, which is distinctive for metals. This is, for the best of our knowledge, the first observation of this unique property of single crystal methylammonium lead bromide perovskite.

中文翻译：

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单晶甲基铵溴化铅钙钛矿的光诱导非阿伦电导率

摘要 在目前的通讯中，研究了单晶甲基溴化铅的电导率与温度的关系。结果，确定了暗/亮条件下的活化能。有趣的是，当施加光照时，根据施加的偏置电压，观察到对温度变化的复杂电导率响应。根据施加的电场，材料遵循两种行为：第一种是半导体的典型行为，第二种行为是金属特有的非阿伦行为。据我们所知，这是对单晶甲基铵溴化铅钙钛矿这种独特性质的首次观察。