The present invention provides soluble, stable singlet fission (SF) compounds, compositions, materials, methods of their use, and methods for their preparation that provide efficient intramolecular singlet fission (iSF) and multiple excitons. The SF compound may be a dimer, an oligomer, or a polymer of polyoligoacenes, where for example, the compound achieves a triplet yield reaching about 200% per absorbed photon. In this system, SF does not depend on intermolecular inter-actions. Instead, SF is an intrinsic property of the molecule and therefore occurs independent of intermolecular interactions. Singlet fission has the potential to significantly improve the photocurrent in single junction solar cells and thus raise the Shockley-Queisser power conversion efficiency limit from about 33% to about 46% or greater. Quantitative SF yield at room temperature has only been observed in crystalline solids or aggregates of higher acenes.
本发明提供了可溶性、稳定的单子裂变(SF)化合物、组合物、材料、使用方法及其制备方法,这些化合物、组合物、材料、使用方法及其制备方法可提供高效的分子内单子裂变(iSF)和多重激子。SF 化合物可以是二聚体、低聚物或多元二
十八烯的聚合物,例如,该化合物每吸收一个光子的三重子产率可达到约 200%。在这种体系中,SF 并不依赖于分子间的相互作用。相反,SF 是分子的固有特性,因此其发生与分子间的相互作用无关。单裂变有可能显著提高单结太阳能电池的光电流,从而将肖克利-奎塞尔功率转换效率极限从约 33% 提高到约 46% 或更高。室温下的定量 SF 产率只在高碳烯的结晶固体或聚合体中观察到过。