All-Small-Molecule Organic Solar Cells with an Ordered Liquid Crystalline Donor

摘要： A new small-molecule donor, namely BTR-Cl, which possesses a strong liquid crystalline property and high crystallinity, works well with the non-liquid crystalline acceptor Y6 and gives a record-high power conversion efficiency (PCE) of 13.6% in single-junction all-small-molecule organic solar cells. The BTR-Cl:Y6-based device was certified at the National Institute of Metrology, certifying a PCE of 13.0%.