11% Organic Photovoltaic Devices Based on PTB7-Th: PC71BM Photoactive Layers and Irradiation-Assisted ZnO Electron Transport Layers.

摘要: The enhancement of interfacial charge collection efficiency using buffer layers is a cost-effective way to improve the performance organic photovoltaic devices (OPVs) because they are often universally applicable regardless active materials. However, availability high-performance materials, which solution-processable at low temperature, limited and require burdensome additional surface modifications. Herein, ZnO based electron transporting (ETLs) for OPVs developed with novel g-ray-assisted solution process. Through careful formulation precursor g-ray irradiation, pre-formation nanoparticles occurs in solutions, enables preparation high quality films. assisted (ZnO-G) films possess remarkably defect density compared conventionally prepared low-defect ZnO-G can extraction ETL without any treatment. power conversion (PCE) device ETLs 11.09% an open-circuit voltage (VOC), short-circuit current ( JSC), fill factor (FF) 0.80 V, 19.54 mA cm-2, 0.71, respectively, one best values among widely studied poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b']dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl)]: [6,6]-phenyl-C71-butyric acid methyl ester (PTB7-Th:PC71BM)-based devices.