基于氧化石墨烯的新型界面材料与有机太阳能电池

项目名称： 基于氧化石墨烯的新型界面材料与有机太阳能电池

项目编号： No.21374120

项目类型： 面上项目

立项/批准年度： 2014

项目学科： 高分子科学

项目作者： 张坚

作者单位： 桂林电子科技大学

项目金额： 40万元

中文摘要： 有机太阳能电池进一步提高效率必须研究半导体与电极的界面结构和性能调控，开发出较低温度下基于溶液制备的高性能界面材料。氧化石墨烯可低成本制备，功函为4.9eV，丰富的官能团使其可通过化学途径调控光电性能。本项目在氧等离子体处理氧化石墨烯（功函5.2eV）作为阳极界面材料获得高效率有机太阳能电池的基础上，探索采用具有高电负性的原子或基团改性制备高功函的氧化石墨烯，以实现较低温度下可基于溶液加工的氧化石墨烯功能材料的可控制备；利用多种手段对氧化石墨烯功能材料的化学组成、表面性质及电学性能等进行表征，研究其作为阳极界面材料时性能调控对电池宏观性能的影响；结合时间分辨红外吸收光谱与荧光光谱等建立界面调控对激子分离与载流子输运等动力学过程的影响机制，实现基于氧化石墨烯功能材料的高性能界面材料的研发与高效有机太阳能电池的制备。

中文关键词： 有机太阳能电池；氧化石墨烯；界面调控；功函数；界面偶极

英文摘要： The potential of a flexible, roll-to-roll manufacturing process has made organic solar cells (OSCs) very attractive as a promising solution to energy and environmental issues. The proper choice of interface layers is crucial important for OSCs. Graphene oxide (GO) was preliminarily shown to be an alternative to PEDOT:PSS anode interfacial layers (AIL) in OSCs. And we have demonstrated O2 plasma treated GO with a work function of 5.2 eV as high performance AILs in organic solar cells. In this project, high electronegative atoms, including chlorine atom (Cl) and fluorine atom (F), will be employed to modify GO, the surface properties of GO is supposed to be controlled by adjusting the content of Cl or F atoms; the surface properties and electronic structures of the GO derivatives will be characterized by Uv-vis, IR, Raman, SKPM, AFM, SEM and TEM et al.; then the GO derivatives will be used as AILs in organic solar cells, and the effect of the GO derivatives on device performance will be investigated; Time-resolved Inferred spectroscopy and fluorescence spectroscopy will be employed to study the exciton dissociation and charge transport in organic solar cells with the GO derivatives. Finally, solution-processable AILs will be developed and efficient organic solar cells will be fabricated.

英文关键词： organic solar cells；graphene oxide；interface engineering；work function；interface dipole