Functionalised hexagonal-domain graphene for position-sensitive photodetectors
Functionalised hexagonal-domain graphene for position-sensitive photodetectors
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DOI：
10.1088/1361-6528/aa5ec0
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发表时间：
2017-03-24
期刊：
影响因子：
3.5
通讯作者：
Russo, Saverio
中科院分区：
文献类型：
--
作者：
De Sanctis, Adolfo;Barnes, Matthew D.;Russo, Saverio
石墨烯独特的光响应特性被广泛应用于从宽带光电探测器到光波导调制器等多种光电子学领域。在这项工作中，我们将应用范围扩大到使用常压化学气相沉积(APCVD)生长的石墨烯的FeCl3插层六角结构域的位置灵敏光电探测器(PSD)。基于FeCl3的APCVD石墨烯晶体的化学功能化受到褶皱的存在的影响，并导致石墨烯层的不均匀掺杂。这种掺杂分布创建了多个p-p(+)光活性结，它们相对于聚焦光点的位置显示出线性和双极光响应，这对于实现PSD是理想的。我们的研究为制造柔性和透明的PSD铺平了道路，这种PSD可以嵌入智能纺织品和可穿戴电子产品中。
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(3)intercalated hexagonal domains of graphene grown by atmospheric pressure chemical vapour deposition (APCVD). The FeCl3-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.