Measuring Light Penetration for Spectral Analysis with Intercalated Graphene/Quantum Dot Photodetectors
Measuring Light Penetration for Spectral Analysis with Intercalated Graphene/Quantum Dot Photodetectors
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发表时间：
2023-06
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通讯作者：
Seungbae Ahn;Ju Ying Shang;O. Vázquez-Mena
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作者：
Seungbae Ahn;Ju Ying Shang;O. Vázquez-Mena
在本文中，我们描述了一种基于量子点层作为光吸收体和石墨烯单层作为集流体的交替堆叠的新型架构。通过在不同深度处实现与每个石墨烯层的独立电接触，可以探测强烈依赖于波长的光电流深度分布。这又允许提取关于入射光的光谱的信息，其可以潜在地用作多光谱仪。我们提出了具有四个石墨烯层的器件，其中插入了PbS量子点作为光吸收组件。
Herein we describe a novel architecture based on alternating stacks of quantum dot layers as light absorbers and graphene monolayers as current collectors. By implementing independent electrical contacts to each graphene layer at different depths, it is possible to probe the photocurrent depth profile which is strongly wavelength dependent. This in turns allows to extract information on the spectrum of the incident light which can potentially serve as an ultrathin multi-spectrometer. We present devices with four graphene layers intercalated with PbS quantum dots as light absorbing components.