论文标题
卤化物钙钛矿发光光电探测器
Halide Perovskite Light Emitting Photodetector
论文作者
论文摘要
光发射和检测是光电通信系统的两个基本属性。到目前为止，使用P-N二极管证明了这两个函数，该二极管在广泛的应用中被利用。但是，由于载体注入和光载体收集的竞争动力学，该设备的光发射和检测是通过切换所施加的电气偏置方向分别实现的。在这里，我们使用卤化物钙钛矿中的移动离子在两种情况下都在任何条件下证明发光光电检测。我们的设备由CSPBBR $ _3 $ MICROWIRE组成，该元素与单壁碳纳米管薄膜电极集成。双重功能源于由移动离子与perogenerated荷载载流子在Perovskite-Electrode界面上的合作作用引起的能量屏障的调节。此外，这种复杂的电荷动力学也会产生新的效果：光增强的电致发光。在我们简单的横向设备设计中，观察到的新光电子现象将扩展多功能光电设备中混合离子电导导体的应用。
Light emission and detection are the two fundamental attributes of optoelectronic communication systems. Until now, both functions have been demonstrated using the p-n diode which is exploited across a wide range of applications. However, due to the competing dynamics of carrier injection and photocarrier collection, with this device light emission and detection are realized separately by switching the direction of the applied electrical bias. Here we use mobile ions in halide perovskites to demonstrate light-emitting photodetection in either condition of applied electrical bias. Our device consists of a CsPbBr$_3$ microwire which is integrated with single-walled carbon nanotube thin film electrodes. The dual functionality stems from the modulation of an energetic barrier caused by the cooperative action of mobile ions with the photogenerated charge carriers at the perovskite-electrode interface. Furthermore, such complex charge dynamics also result in a novel effect: light-enhanced electroluminescence. The observed new optoelectronic phenomena in our simple lateral device design will expand the applications for mixed ionic-electronic conductors in multifunctional optoelectronic devices .
