论文标题
带有量子钻石显微镜的硅光伏设备中的成像电流路径
Imaging current paths in silicon photovoltaic devices with a quantum diamond microscope
论文作者
论文摘要
钻石中含氮中心的磁成像，也称为量子钻石显微镜，已成为一种有用的技术，用于在固态设备中电荷电流的空间映射。在这项工作中，我们研究了光伏（PV）设备的应用，其中电流是由光诱导的。我们开发了广阔的氮 - 视牙显微镜，该显微镜可以独立刺激和测量PV设备，并在一系列原型晶体硅PV设备上测试我们的系统。我们首先演示了由聚焦激光点照亮的自定义PV设备的微尺尺度矢量磁场成像，从而揭示了短路和开路条件下的内部电流路径。然后，我们演示了相互互动的太阳能电池中光电流的时间分辨成像，以微秒分辨率检测到电流的堆积以及随后的衰减。这项工作提出了一个通用且易于访问的分析平台，该平台可能会在新兴PV技术的研究中找到明显的应用。
Magnetic imaging with nitrogen-vacancy centers in diamond, also known as quantum diamond microscopy, has emerged as a useful technique for the spatial mapping of charge currents in solid-state devices. In this work, we investigate an application to photovoltaic (PV) devices, where the currents are induced by light. We develop a widefield nitrogen-vacancy microscope that allows independent stimulus and measurement of the PV device, and test our system on a range of prototype crystalline silicon PV devices. We first demonstrate micrometer-scale vector magnetic field imaging of custom PV devices illuminated by a focused laser spot, revealing the internal current paths in both short-circuit and open-circuit conditions. We then demonstrate time-resolved imaging of photocurrents in an interdigitated back-contact solar cell, detecting current build-up and subsequent decay near the illumination point with microsecond resolution. This work presents a versatile and accessible analysis platform that may find distinct application in research on emerging PV technologies.
