All carbon-based photodetectors: an eminent integration of graphite quantum dots and two dimensional graphene.
All carbon-based photodetectors: an eminent integration of graphite quantum dots and two dimensional graphene.
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DOI：
10.1038/srep02694
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发表时间：
2013
影响因子：
4.6
通讯作者：
Chen, Yang-Fang
中科院分区：
文献类型：
--
作者：
Cheng, Shih-Hao;Weng, Tong-Min;Lu, Meng-Lin;Tan, Wei-Chun;Chen, Ju-Ying;Chen, Yang-Fang
基于由石墨量子点（QD）和二维石墨烯晶体组成的全碳基材料制成的复合材料，已经展示了具有高灵敏度的光电探测器。在光照下，可以获得高达4 × 107 AW-1的光电流响应度。 潜在的机制归因于光生电子和空穴的空间分离，这是由于石墨量子点和石墨烯之间的界面上的适当能带对准引起的电荷转移。此外，石墨量子点的大吸收率和石墨烯片的优异导电性也起着重要作用。因此，我们的结果展示了一个突出的例证，为不同维度的纳米结构碳材料的独特性能的整合，以实现高效的设备。与相关的机制一起，它为进一步开发具有优异性能的所有碳基，廉价，无毒的光电子器件迈出了有价值的一步。
Photodetectors with ultrahigh sensitivity based on the composite made with all carbon-based materials consisting of graphite quantum dots (QDs), and two dimensional graphene crystal have been demonstrated. Under light illumination, remarkably, a photocurrent responsivity up to 4 × 107 AW−1 can be obtained. The underlying mechanism is attributed to the spatial separation of photogenerated electrons and holes due to the charge transfer caused by the appropriate band alignment across the interface between graphite QDs and graphene. Besides, the large absorptivity of graphite QDs and the excellent conductivity of the graphene sheet also play significant roles. Our result therefore demonstrates an outstanding illustration for the integration of the distinct properties of nanostructured carbon materials with different dimensionalities to achieve highly efficient devices. Together with the associated mechanism, it paves a valuable step for the further development of all carbon-based, cheap, and non-toxic optoelectronics devices with excellent performance.
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影响因子：
56.9
作者：
Nair, R. R.;Blake, P.;Geim, A. K.
通讯作者：
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影响因子：
17.1
作者：
King, Paul J.;Khan, Umar;Coleman, Jonathan N.
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Ruiz-Vargas, Carlos
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Konstantatos, Gerasimos;Badioli, Michela;Koppens, Frank H. L.
通讯作者：
Koppens, Frank H. L.
影响因子：
41.2
作者：
Geim, A. K.;Novoselov, K. S.
通讯作者：
Novoselov, K. S.