A new class of non-planar and three-dimensional spirobifluorene-modified perylene diimide compounds has been successfully designed and synthesized. The functionalization of the perylene diimide core with different spirobifluorene moieties can alter the molecular geometry as well as extend the spectral coverage into the red region. In addition, these compounds can be utilized as donor materials in combination with fullerene to form bulk heterojunctions, and particularly efficient organic photovoltaic (OPV) devices demonstrating high open-circuit voltages of 0.97 V and a power conversion efficiencies of up to 4% have been prepared. These values are the highest among the cells utilizing p-type perylene diimide as photoactive material in OPV devices. This work opens up a new avenue for the design and synthesis of a new class of p-type perylene diimide compounds that are promising candidates as donor materials in the fabrication of OPV devices.
一种新型的非平面和三维螺双
氟苊修饰的
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酰亚胺化合物已经成功设计和合成。用不同的螺双
氟苊基团对
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酰亚胺核心进行功能化可以改变分子的几何形状,并将光谱覆盖范围扩展到红色区域。此外,这些化合物可以与
富勒烯结合,作为供体材料形成大块异质结,并成功制备出特别高效的有机光伏(OPV)器件,展现出0.97 V的高开路电压和高达4%的光电转换效率。这个值是在以p型
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酰亚胺作为光活性材料的OPV器件中所达到的最高
水平。这项工作为设计和合成新型p型
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酰亚胺化合物开辟了一条新的途径,这些化合物作为OPV器件制造中的供体材料具有良好的前景。