Centre for Graphene Science, College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter EX4 4QF, United Kingdom.
Nanotechnology. 2017 Mar 24;28(12):124004. doi: 10.1088/1361-6528/aa5ec0.
Graphene's unique photoresponse has been largely used in a multitude of optoelectronics applications ranging from broadband photodetectors to wave-guide modulators. In this work we extend the range of applications to position-sensitive photodetectors (PSDs) using FeCl-intercalated hexagonal domains of graphene grown by atmospheric pressure chemical vapour deposition (APCVD). The FeCl-based chemical functionalisation of APCVD graphene crystals is affected by the presence of wrinkles and results in a non-uniform doping of the graphene layers. This doping profile creates multiple p-p photoactive junctions which show a linear and bipolar photoresponse with respect to the position of a focused light spot, which is ideal for the realization of a PSD. Our study paves the way towards the fabrication of flexible and transparent PSDs that could be embedded in smart textile and wearable electronics.
石墨烯独特的光响应特性已被广泛应用于各种光电应用中，从宽带光探测器到波导调制器。在这项工作中，我们将应用范围扩展到使用原子层沉积（APCVD）生长的 FeCl 插层的六方畴石墨烯作为位置敏感光电探测器（PSD）。基于 FeCl 的 APCVD 石墨烯晶体的化学功能化受到褶皱的影响，导致石墨烯层的掺杂不均匀。这种掺杂分布形成了多个 p-p 光活性结，表现出相对于聚焦光斑位置的线性和双极光电响应，这非常适合实现 PSD。我们的研究为制造可嵌入智能纺织品和可穿戴电子设备的柔性透明 PSD 铺平了道路。
