All-Small-Molecule Nonfullerene Organic Solar Cells with High Fill Factor and High Efficiency over 10%

We synthesized two wide bandgap A–D–A structured <i>p</i>-type organic semiconductor (<i>p</i>-OS) small molecules with weak electron-withdrawing ester end groups: <b>SM1</b> with cyano group (CN) on the ester group and <b>SM2</b> without the CN group. <b>SM1</b> showed stronger absorption, lower-lying HOMO energy level, and higher hole mobility in comparison with that of <b>SM2</b> without the CN groups. The all-small-molecule organic solar cell (SM-OSC) with <b>SM1</b> as donor and a narrow bandgap <i>n</i>-OS IDIC as acceptor demonstrated a high power conversion efficiency (PCE) of 10.11% and a high fill factor (FF) of 73.55%, while the PCE of the device based on <b>SM2</b>:IDIC is only 5.32% under the same device fabrication condition. The PCE of 10.11% and FF of 73.55% for the <b>SM1</b>-based device are the highest values for the nonfullerene SM-OSCs reported in the literature so far. The results indicate that the cyano substitution in <b>SM1</b> plays an important role in improving the photovoltaic performance of the <i>p</i>-OS donors in the nonfullerene SM-OSC. In addition, the photoinduced force microscopy (PiFM) was first used in OSCs to characterize the morphology of its donor/acceptor blend active layer

Additional file 1:Tables S1 and S2. of Patterns of locoregional failure following post-operative intensity-modulated radiotherapy to oral cavity cancer: quantitative spatial and dosimetric analysis using a deformable image registration workflow

Showing our study’s patient/treatment and failure characteristics compared to extant literature. (PDF 99 kb

Additional file 1: Table S1. of Long-term patient reported outcomes following radiation therapy for oropharyngeal cancer: cross-sectional assessment of a prospective symptom survey in patients ≥65 years old

Proportions of patients reporting moderate to severe (≥5) rating for the 22 MDASI-HN symptom items by clinical subgroups of interest. (DOCX 20 kb