具有近红外吸收功能的聚合物太阳能电池材料的制备及性能研究

Organic photovoltaic technology provides an essential way for the effective utilization of solar energy. The advantages of polymer solar cells (PSCs) include low cost, light weight, easy fabrication, flexible and tunable properties. There is increasing interest in PSCs during the last few years, however, the power conversion efficiency (PCE) of PSCs far beyond practical requirements as result of inefficient absorption. Up on this, Design and synthesis of appropriately low band gap polymers, especially enhance the absorption of NIR region become the extremely interesting topics in the field of high efficiency PSCs. In this project, we will try to design and prepare a series of highly soluble D-A type functional polymeric materials in which the absorption of polymers can be reached at NIR region. Relationships among the materials structure, the electrical transition phenomena, and device performance, will be systematically explored. We also expect that the efficiency of devices will be further improved by tandem solar cell devices.

有机光伏技术（OPVs）为太阳能的有效利用提供了一条重要途径。有机太阳能电池凭借其成本低廉、材质轻巧、易于加工、易于携带等优势而备受瞩目。然而有机太阳能电池要实现商业化，就必须解决当前存在的光电转化效率较低的这一瓶颈问题。本项目将针对现有聚合物太阳能电池材料对可见光吸收较强，但对近红外光吸收较弱，不能最大程度地利用太阳能，从而导致光电转化效率低的问题，以设计合成具有较强近红外吸收的聚合物材料为切入点，构建半透明电池以及叠层电池，研究材料的基本结构、电子迁移现象、器件性能之间的构效关系，深入探索大幅提高电池光电转化效率的新途径。

有机光伏技术为太阳能的有效利用提供了一条重要途径。有机太阳能电池凭借其成本低廉、材质轻巧、易于加工、颜色多样等优势而备受瞩目。然而有机太阳能电池要实现商业化，就必须解决当前存在的光电转化效率较低的这一瓶颈问题。本项目针对现有有机太阳能电池材料对可见光吸收较强，但对近红外光吸收较弱，不能最大程度地利用太阳能，从而导致光电转化效率低的问题，设计合成了一系列具有较强近红外吸收的有机光活性材料（最大吸收边缘达到1 微米），构建了半透明太阳能电池器件，研究了材料的基本结构、电子迁移现象、器件性能之间的构效关系，探索了如何通过降低有机太阳能电池的能量损失来大幅提高电池光电转化效率的新途径。这一研究结果为进一步开发高效近红外受体材料以及降低有机光伏器件能量损失提供了新的思路。