Highly Sensitive Flexible Photodetectors Based on Self-Assembled Tin Monosulfide Nanoflakes with Graphene Electrodes,ACS Applied Materials & Interfaces

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Highly Sensitive Flexible Photodetectors Based on Self-Assembled Tin Monosulfide Nanoflakes with Graphene Electrodes
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-09-11 00:00:00 , DOI: 10.1021/acsami.7b09959
Ganesan Mohan Kumar ₁ , Xiao Fu ₁ , Pugazhendi Ilanchezhiyan ₁ , Shavkat U. Yuldashev ₁ , Dong Jin Lee ₁ , Hak Dong Cho ₁ , Tae Won Kang ₁

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Tin monosulfide (SnS) nanostructures have attracted huge attention recently because of their high absorption coefficient, high photoconversion efficiencies, low energy cost, ease of deposition, and so on. Here, in this paper, we report on the low-cost hydrothermal synthesis of the self-assembled SnS nanoflake-like structures in terms of performance for the photodetectors. High-performance photodetectors were fabricated using SnS nanoflakes as active layers and graphene as the lateral electrodes. The SnS photodetectors exhibited excellent photoresponse properties with a high responsivity of 1.7 × 10⁴ A/W and have fast response and recovery times. In addition, the photodetectors exhibited long-term stability and strong dependence of photocurrent on light intensity. These excellent characteristics were attributed to the larger surface-to-volume ratio of the self-assembled SnS nanoflakes and the effective separation of the photogenerated carriers at graphene/SnS interfaces. Additionally, a flexible photodetector based on SnS nanoflakes was also fabricated on a flexible substrate that demonstrated similar photosensitive properties. Furthermore, this study also demonstrates the potential of hydrothermal-processed SnS nanoflakes for high-performance photodetectors and their application in flexible low-cost optoelectronic devices.

中文翻译：

基于自组装单硫化锡纳米薄片和石墨烯电极的高灵敏度柔性光电探测器

单硫化锡（SnS）纳米结构由于其高吸收系数，高光转换效率，低能源成本，易于沉积等优点而近来备受关注。在本文中，我们从光电探测器的性能方面报告了自组装SnS纳米片状结构的低成本水热合成。高性能光电探测器是使用SnS纳米薄片作为活性层，并使用石墨烯作为侧向电极制造的。SnS光电探测器表现出出色的光响应特性，并具有1.7×10 ⁴的高响应度A / W，并具有快速的响应和恢复时间。另外，光电探测器表现出长期稳定性，并且光电流对光强度的依赖性强。这些优异的特性归因于自组装SnS纳米薄片的较大的表面体积比，以及在石墨烯/ SnS界面处光生载流子的有效分离。此外，还在具有类似光敏特性的柔性基板上制造了基于SnS纳米薄片的柔性光电探测器。此外，这项研究还证明了水热处理的SnS纳米薄片在高性能光电探测器中的潜力及其在柔性低成本光电设备中的应用。

更新日期：2017-09-11

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