石墨炔及其衍生物在钙钛矿太阳能电池的应用

Application of graphdiyne and its derivatives in perovskite solar cells

摘要:

钙钛矿太阳能电池(PSCs)因具有高效率、可溶液加工和低成本等优点受到了人们广泛的关注。然而，在PSCs的各个功能层及界面之间存在缺陷非辐射复合、界面接触不良和薄膜质量较差等问题，阻碍了PSCs光电转换效率和稳定性的提高。相较于石墨烯，含有sp杂化碳原子的石墨炔具有独特的三角微观结构、天然的带隙、超高的载流子迁移率以及优异的光电和机械性能，成为光电能源领域重要的候选材料。综述了石墨炔及其衍生物在PSCs的电子传输层、空穴传输层以及光吸收层中的应用，重点探讨了石墨炔及其衍生物在功能层及其界面中钝化缺陷、改善薄膜形貌和界面接触、提高载流子传输等方面的作用。最后，对石墨炔及其衍生物在PSCs领域中的发展提出了展望。

Abstract:

Perovskite solar cells (PSCs) have attracted extensive attention due to their high efficiency, nature of solution processing and low manufacturing cost. However, the presence of transport barriers and defect trap states at the interfaces and grain boundaries decreases their efficiency and stability and increases the hysteresis. Compared with graphene, graphdiyne involving sp hybridized carbons is featured with unique triangular microstructure, natural band gap, ultra-high carrier mobility and excellent photoelectric and mechanical properties, making it an important candidate as photoelectric materials for use in the photovoltaic devices. In this review, the structure and properties of graphdiyne and its derivatives were briefly reviewed, and the roles of graphdiyne and its derivatives in the electron and hole transport layers and light absorption layer of PSCs were summarized in detail. The role of graphdiyne and its derivatives in passivation of defects, improvement of film morphology and interface contact, and enhancement of carrier transport were mainly discussed. Finally, the future research on graphdiyne and its derivatives in the field of PSCs is presented.