The power conversion efficiencies (PCEs) of non-fullerene small molecule acceptors based on different donors have been compared and summarized.

According to the evidence from both theoretical calculations and experimental findings, conjugated ladder polymers containing large π-conjugated structure, a high number of nitrogen heteroatoms, and a multiring aromatic system, could be an ideal organic anode candidate for lithium-ion batteries (LIBs). In this report, we demonstrated that the nanostructured polyazaacene analogue poly(1,6-dihydropyrazino[2,3g]quinoxaline-2,3,8-triyl-7-(2H)-ylidene-7,8-dimethylidene) (PQL) shows high performance as anode materials in LIBs: high capacity (1750 mAh g(-1), 0.05C), good rate performance (303 mAh g(-1), 5C), and excellent cycle life (1000 cycles), especially at high temperature of 50 °C. Our results suggest nanostructured conjugated ladder polymers could be alternative electrode materials for the practical application of LIBs.

Enhancing the electron mobility of organic conjugated materials without tedious modification or synthesis is highly desirable and practical. In this research, we demonstrated that the electron mobility of naphthalene diimide (NDI) in thin film transistors (TFTs) under ambient conditions can be dramatically enhanced through a simple step reaction by replacing oxygen atoms with sulfur atoms. The electron 10 mobilities of as-prepared compounds range from non-detectable (parent NDI), to 3.0×10 -4 cm 2 V -1 s -1 (NDI-1S), 3.0×10 -3 cm 2 V -1 s -1 (NDI-3S), 3.7×10 -3 cm 2 V -1 s -1 (NDI-2S-cis), and 0.01 cm 2 V -1 s -1 (NDI-2S-trans) with on/off ratio as high as 4×10 5 . Our primary result suggests that thionation could be a promising method to tune the band position and bandgap of organic semiconductors for high performance TFTs. 15 Experimental section Synthesis of NDI-1S, NDI-2S-trans and NDI-2S-cisA solution of lawesson's reagent (485 mg, 1.2 mmol, 2.0 eq. to 75