Abstract Graphene and carbon nanotubes, featured with outstanding electronic, photonic and mechanical properties as well as Earth abundancy, are perfect for use as carrier-selective transport and collecting layers in photovoltaics. In recent years, graphene and carbon nanotube films have underpinned significant advancement in the planar heterojunction (PHJ) solar cells, with reduced fabrication cost, improved power conversion efficiencies approaching 20%, and the great potential for scalable deployment. Here we discuss the state-of-art progress in graphene-based and carbon nanotube-based PHJ solar cells leveraging advanced nanocarbon technologies as well as industrial-compatible solar cell design and processing. Fabrication and functionalization strategies of graphene and carbon nanotube films for electronic and photonic optimization of PHJ solar cells are systematically reviewed. We also envision technological pathways and future prospects to exploit multifunctionality of graphene and carbon nanotubes to realize ubiquitous application of high-performance, flexible PHJ solar cells.

中文翻译：

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用于平面异质结太阳能电池的多功能石墨烯和碳纳米管薄膜

摘要 石墨烯和碳纳米管具有出色的电子、光子和机械性能以及地球丰富度，非常适合用作光伏中的载流子选择性传输和收集层。近年来，石墨烯和碳纳米管薄膜支撑了平面异质结 (PHJ) 太阳能电池的重大进步，降低了制造成本，提高了接近 20% 的功率转换效率，以及可扩展部署的巨大潜力。在这里，我们讨论了基于石墨烯和基于碳纳米管的 PHJ 太阳能电池利用先进的纳米碳技术以及工业兼容的太阳能电池设计和加工的最新进展。系统回顾了石墨烯和碳纳米管薄膜的制备和功能化策略，用于 PHJ 太阳能电池的电子和光子优化。我们还设想了利用石墨烯和碳纳米管的多功能性来实现高性能、柔性 PHJ 太阳能电池的普遍应用的技术途径和未来前景。