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Highly-dispersible reduced graphene oxide/polymer nanocomposites as efficient hole-transporting materials for perovskite solar cells
Composites Science and Technology ( IF 8.3 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.compscitech.2020.108548
Se-Phin Cho , Geul Han , You-Hyun Seo , Yong-Jin Noh , Joon-Yong Sohn , In-Tae Hwang , Junhwa Shin , Chan-Hee Jung , Seok-In Na

Abstract In this research, we demonstrate that a solution-processable reduced graphene oxide/poly (N-vinylpyrrolidone) nanocomposite (rGO/PVP) can be easily obtained by a scalable and cost-effective electron beam-based method; and further, that it functioned well as a hole-transport layer (HTL) in perovskite solar cells (PeSCs). The rGO/PVP composites were produced by electron-beam irradiation-induced reduction of GO/PVP mixtures in ethanol/distilled water (50 v/v %), without any heat or reducing agents. The prepared rGO/PVP showed dispersion stability of six months, even in an aqueous alcoholic solvent of 5 mg/mL. Its solution-processed thin film demonstrated a uniform, smooth surface, and full-cover morphology, a good conductivity of ~0.2 S/cm, and a high work function of 5.15 eV. As a result, the solution-processed rGO/PVP as HTL for the PeSCs outweighed the conventional graphene nanoflakes (GNFs), producing higher device efficiency. Worthy of note, the rGO/PVP-based PeSCs showed better power conversion efficiency (PCE) and device stability than the reference poly (3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS)-based counterpart. This finding demonstrates that the rGO/PVP composite, which is easily producible via cost-effective and large-scale affordable electron beam technology, could provide a promising solution-processable GNFs-based HTL for long-lasting high-performance PeSCs.

中文翻译:

高分散性还原氧化石墨烯/聚合物纳米复合材料作为钙钛矿太阳能电池的高效空穴传输材料

摘要 在这项研究中,我们证明了一种可溶液加工的还原氧化石墨烯/聚(N-乙烯基吡咯烷酮)纳米复合材料(rGO/PVP)可以通过可扩展且具有成本效益的基于电子束的方法轻松获得;此外,它在钙钛矿太阳能电池 (PeSC) 中作为空穴传输层 (HTL) 发挥了良好的作用。rGO/PVP 复合材料是通过电子束辐照诱导还原乙醇/蒸馏水 (50 v/v %) 中的 GO/PVP 混合物制备的,没有任何加热或还原剂。制备的 rGO/PVP 显示出六个月的分散稳定性,即使在 5 mg/mL 的水性醇溶剂中也是如此。其溶液处理的薄膜表现出均匀、光滑的表面和全覆盖形态,良好的导电性约为 0.2 S/cm,以及 5.15 eV 的高功函数。因此,溶液处理的 rGO/PVP 作为 PeSC 的 HTL 超过了传统的石墨烯纳米薄片(GNF),产生了更高的器件效率。值得注意的是,基于 rGO/PVP 的 PeSC 显示出比基于参考聚(3,4-亚乙基二氧噻吩):聚(苯乙烯磺酸盐)(PEDOT:PSS)的对应物更好的功率转换效率(PCE)和器件稳定性。这一发现表明,rGO/PVP 复合材料可以通过具有成本效益和大规模负担得起的电子束技术轻松生产,可以为持久的高性能 PeSC 提供一种有前景的可解决方案处理的基于 GNF 的 HTL。4-亚乙基二氧噻吩):基于聚(苯乙烯磺酸盐)(PEDOT:PSS)的对应物。这一发现表明,rGO/PVP 复合材料可以通过具有成本效益和大规模负担得起的电子束技术轻松生产,可以为持久的高性能 PeSC 提供一种有前景的可解决方案处理的基于 GNF 的 HTL。4-亚乙基二氧噻吩):基于聚(苯乙烯磺酸盐)(PEDOT:PSS)的对应物。这一发现表明,rGO/PVP 复合材料可以通过具有成本效益和大规模负担得起的电子束技术轻松生产,可以为持久的高性能 PeSC 提供一种有前景的可解决方案处理的基于 GNF 的 HTL。
更新日期:2021-01-01
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