Synthesis, characterization and photovoltaic properties of poly(thiophenevinylene-alt-benzobisoxazole)s

摘要: Herein we report the synthesis of two solution processible, conjugated polymers containing benzobisoxazole moiety. The were characterized using 1H NMR, UV-Vis and fluorescence spectroscopy. Thermal gravimetric analysis shows that do not exhibit significant weight loss until approximately 300 °C under nitrogen. Cyclic voltammetry have reversible reduction waves with estimated LUMO levels at −3.02 −3.10 eV relative to vacuum optical bandgaps 2.04–2.17 eV. Devices based on blends copolymers [6,6]-phenyl C61 butyric acid methyl ester (PCBM) exhibited modest power conversion efficiencies. Theoretical models reveal there is poor electron delocalization along polymer backbone, leading performance. However, energy these indicate incorporation benzobisoxazoles into backbone a promising strategy for new materials.