Abstract Structural variants of boron subphthalocyanines were tested as light absorbing and electron donating materials paired with C60 in organic photovoltaic cells, in a rooftop ambient environment according to ISOS-O3 protocols. Constant current monitoring and daily current-voltage sweeps, reinforced by irradiance and temperature tracking, reveal differing degradation rates depending on the chemical structure of the boron subphthalocyanine. Results suggest that the observed initial burn-in efficiency loss observed in all devices is due to C60, but that the longer term degradation trend is attributable to the chemical breakdown of the subphthalocyanine donors through hydrolysis. These findings demonstrate that the molecular structure of boron subphthalocyanines is a significant handle on device longevity, and that a structure-property relationship can be established for stability. The results also highlight the need for alternative electron accepting materials to C60 for pairing with boron subphthalocyanines in planar heterojunction solar cells, as well as the necessity of a more robust encapsulation methodology.

中文翻译：

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硼亚酞菁作为户外寿命监测有机光伏电池中的电子供体

摘要 根据 ISOS-O3 协议，在屋顶周围环境中，将硼亚酞菁的结构变体作为与有机光伏电池中的 C60 配对的吸光和给电子材料进行了测试。通过辐照度和温度跟踪加强的恒流监测和每日电流-电压扫描揭示了不同的降解率，具体取决于硼亚酞菁的化学结构。结果表明，在所有器件中观察到的初始老化效率损失是由 C60 引起的，但长期退化趋势可归因于亚酞菁供体通过水解的化学分解。这些发现表明，硼亚酞菁的分子结构是决定器件寿命的重要因素，并且可以建立结构-性能关系以确保稳定性。结果还强调了需要替代 C60 的电子接受材料以与平面异质结太阳能电池中的硼亚酞菁配对，以及更强大的封装方法的必要性。