具有商用潜力的P3HT:PCBM太阳能电池材料是目前光伏材料研发领域的热点之一。本项目针对该材料的微观结构与光伏性能的关系展开研究，以一系列性能各异的P3HT:PCBM光伏材料体系为研究对象，采用固体高分辨核磁共振技术研究各种体系的相成分、分子相容性、分子局部运动性以及界面相的分子级结构。分析总结P3HT:PCBM材料体系的微观结构对其光伏性能的影响规律，从而确定理想的P3HT:PCBM电池材料的相结构模型。项目预期从微观结构的角度揭示P3HT:PCBM太阳能电池材料的光伏转化机理，实现使用高分辨固体核磁共振技术直观、准确的表征同种和同类光伏材料的结构，建立一套可靠的定量和定性的结构分析方法。项目的研究成果对于深入理解性能优化的P3HT:PCBM光伏材料的结构特征具有重要意义，可以为同种或同类太阳能电池材料的优化与研发提供科学依据。

Photovoltaic blends based on poly-3-hexyl-thiophene and [6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PCBM) are among the most studied materials systems for organic photovoltaic solar cells(OPVs) applications, which has great potential for commercial use to date. To investigate the impact of structure on photovoltaic performance, a series P3HT:PCBM systems which have different photovoltaic properties are going to be studied by using advanced solid-state nuclear magnetic resonance techniques(SSNMR).Based on the demonstration of phase content, molecular miscibility，local dynamics as well as interfacial structure, the relationship between microstructure and photovoltaic performance is tended to be revealed which will provide details for the model construction of ideal P3HT:PCBM photovoltaic system. Meanwhile, according to the structural information, we will try to explain why and how dose the exciton dissociate in the interfacial area. This project will fully explore the advantage of SSNMR techniques in structural study of P3HT:PCBM materials, which is accurate and reliable for quantitative and qualitative structural analysis on multi-phase materials. Besides that, the findings from this study is going to be solid support for the optimization of P3HT:PCBM solar cell as well as the development of novel OPVs systems.