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Efficiency and stability enhancement of perovskite solar cells using reduced graphene oxide derived from earth-abundant natural graphite

机译：利用土石墨氧化物衍生的石墨烯氧化物的效率和稳定性增强钙钛矿太阳能电池

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摘要

Graphene - two-dimensional (2D) sheets of carbon atoms linked in a honeycomb pattern - has unique properties that exhibit great promise for various applications including solar cells. Herein we prepared two-dimensional (2D) reduced graphene oxide (rGO) nanosheets from naturally abundant graphite flakes (obtained from Tuv aimag in Mongolia) using solution processed chemical oxidation and thermal reduction methods. As a proof of concept, we used our rGO as a hole transporting material (HTM) in perovskite solar cells (PSCs). Promisingly, the use of rGO in the hole transporting layer (HTL) not only enhanced the photovoltaic efficiency of PSCs, but also improved the device stability. In particular, the best performing PSC employing rGO nanosheets exhibited a power conversion efficiency (PCE) of up to 18.13%, while the control device without rGO delivered a maximum efficiency of 17.26%. The present work demonstrates the possibilities for solving PSC issues (stability) using nanomaterials derived from naturally abundant graphite sources.
机译：石墨烯 - 以蜂窝图案连接的二维（2D）碳原子片 - 具有独特的性质，对包括太阳能电池包括太阳能电池的各种应用表现出巨大的承诺。本文使用溶液加工的化学氧化和热还原方法，我们制备了二维（2D）从天然丰富的石墨薄片（从蒙古中获得的Tuviveag获得）的石墨烯片（RGO）纳米液。作为概念的证据，我们将RGO用作钙钛矿太阳能电池（PSC）中的空穴传输材料（HTM）。承诺，在空穴传输层（HTL）中使用RGO（HTL）不仅提高了PSC的光伏效率，而且还提高了装置稳定性。特别地，采用RGO纳米片的最佳性能PSC表现出高达18.13％的功率转换效率（PCE），而没有RGO的控制装置最大效率为17.26％。本作者通过衍生自天然丰富的石墨来源衍生的纳米材料来求解PSC问题（稳定性）的可能性。

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