Mitsubishi Chemical Center for Advanced Materials, University of California, Santa Barbara, CA 93106, USA.
Phys Chem Chem Phys. 2013 Nov 21;15(43):18894-9. doi: 10.1039/c3cp53552e.
Solution-processed perylenediimides (PDIs) with varying peri and bay substituents are characterized in order to better understand the relationships between molecular structure, solid state order, charge transport, and photovoltaic performance. It was found that bulky bay substituents interfere with molecular packing, leading to low charge transport and photovoltaic efficiencies compared to PDIs with fewer or less disruptive substituents. We assessed the potential of PDIs as acceptors for organic photovoltaics (OPVs) by utilizing a solution-processed bilayer OPV device architecture with the donor benzoporphyrin. At AM1.5G illumination, power conversion efficiencies (PCEs) up to 2.0% are obtained for solution-processed bilayer OPVs employing PDIs as acceptors. These results demonstrate the potential of PDIs as photovoltaic acceptor materials while elucidating the relationships between molecular structure and material properties.
为了更好地理解分子结构、固态有序性、电荷输运和光伏性能之间的关系，对具有不同的并五苯和苯并噻吩取代基的溶液处理的并五苯二酰亚胺（PDI）进行了表征。研究发现，与取代基较少或较少干扰的 PDI 相比，大体积的苯并噻吩取代基会干扰分子堆积，导致电荷输运和光伏效率降低。我们通过使用具有供体苯并卟啉的溶液处理双层有机光伏器件结构，评估了 PDIs 作为有机光伏（OPV）受体的潜力。在 AM1.5G 光照下，采用 PDIs 作为受体的溶液处理双层 OPV 的功率转换效率（PCE）高达 2.0%。这些结果表明 PDIs 作为光伏受体材料具有潜力，同时阐明了分子结构和材料性能之间的关系。
