| 唐波.化学通报,2023,86(3):333-338. |
| 高性能石墨烯基染料敏化太阳能电池光阳极 |
| Graphene based photoanode for DSSCs with high performances |
| 投稿时间：2022-08-10 修订日期：2022-08-19 |
| DOI： |
| 中文关键词: 光阳极，石墨烯，还原氧化石墨烯，三维网状石墨烯，输运层 |
| 英文关键词:photoanodes, graphene, RGO, 3DGNs, transport layer |
| 基金项目:国家自然科学基金项目(51506012)和江苏省青蓝工程项目(SCZ1908200013)资助 |
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| 中文摘要: |
| 石墨烯基光阳极可以显著提高染料敏化太阳能电池(DSSCs)的性能,因而具有广阔的应用前景。本文制备了一种具有三层结构的光阳极,并对每层之间的协同效应进行了研究。同时揭示了传输层与工作层界面接触水平对DSSCs性能的影响。传输层中三维网状石墨烯(3DGNs)的高质量及连续性结构为光生电子提供了快速的输运通道,而能量转换效率(η)与还原氧化石墨烯(RGO)的质量分数和还原程度密切相关,工作层中的RGO增强了电极和电解质界面处的化学接触水平。为了进一步提高入射光的散射能力及染料分子的吸附能力,在光阳极中增加了基于RGO-TiO2的散射层。经过优化工作层和散射层中RGO的官能团的类型和质量分数,DSSCs的能量转换效率达到10.7%。 |
| 英文摘要: |
| Graphene assisted photoanodes are promising because of the high performance of the resulting dye sensitized solar cells (DSSCs). A photoanode with a three-layer structure was prepared in this study and the synergy between each layer was found to play a vital role in its photovoltaic properties. The influence of interface contact between the transport layer and work layer is revealed. The high quality and continuous structure of the 3DGNs provided a channel amenable to fast transport of photo-induced electrons. Moreover, the obtained energy conversion efficiency (η) was closely related to the mass fraction and reduction degree of the RGO, which affords a close contact at the interface between the graphene basal plane and electrolyte. In order to further enhance the scattering ability for the incident light and improve the adsorption ability for dye molecules, a scattering layer based on the RGO-TiO2 is added in the photoanode. After a comprehensive optimization (including the types of functional groups and mass fractions of the RGO in the work layer and scattering layer), the resulting η reaches 10.7%, which is higher than that of reported graphene modified DSSCs. |
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