Jeon Il, Yoon Jungjin, Ahn Namyoung, Atwa Mohamed, Delacou Clement, Anisimov Anton, Kauppinen Esko I, Choi Mansoo, Maruyama Shigeo, Matsuo Yutaka
Department of Mechanical Engineering, School of Engineering, The University of Tokyo , Tokyo 113-8656, Japan.
Department of Mechanical and Aerospace Engineering, Seoul National University , Seoul 08826, South Korea.
J Phys Chem Lett. 2017 Nov 2;8(21):5395-5401. doi: 10.1021/acs.jpclett.7b02229. Epub 2017 Oct 23.
Transparent carbon electrodes, carbon nanotubes, and graphene were used as the bottom electrode in flexible inverted perovskite solar cells. Their photovoltaic performance and mechanical resilience were compared and analyzed using various techniques. Whereas a conventional inverted perovskite solar cells using indium tin oxide showed a power conversion efficiency of 17.8%, the carbon nanotube- and graphene-based cells showed efficiencies of 12.8% and 14.2%, respectively. An established MoO doping was used for carbon electrode-based devices. The difference in the photovoltaic performance between the carbon nanotube- and graphene-based cells was due to the difference in morphology and transmittance. Raman spectroscopy, and cyclic flexural testing revealed that the graphene-based cells were more susceptible to strain than the carbon nanotube-based cells, though the difference was marginal. Overall, despite higher performance, the transfer step for graphene has lower reproducibility. Thus, the development of better graphene transfer methods would help maximize the current capacity of graphene-based cells.
透明碳电极、碳纳米管和石墨烯被用作柔性倒置钙钛矿太阳能电池的底部电极。使用各种技术对它们的光伏性能和机械弹性进行了比较和分析。使用氧化铟锡的传统倒置钙钛矿太阳能电池的功率转换效率为17.8%，而基于碳纳米管和石墨烯的电池的效率分别为12.8%和14.2%。已确立的MoO掺杂用于基于碳电极的器件。基于碳纳米管和石墨烯的电池在光伏性能上的差异是由于形态和透射率的差异。拉曼光谱和循环弯曲测试表明，尽管差异很小，但基于石墨烯的电池比基于碳纳米管的电池更容易受到应变的影响。总体而言，尽管性能更高，但石墨烯的转移步骤具有较低的可重复性。因此，开发更好的石墨烯转移方法将有助于最大化基于石墨烯的电池的电流容量。
