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首页> 外文期刊>ACS applied materials & interfaces >Biomimetic Approach to Inhibition of Photooxidation in Organic Solar Cells Using Beta-Carotene as an Additive
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Biomimetic Approach to Inhibition of Photooxidation in Organic Solar Cells Using Beta-Carotene as an Additive

机译：β-胡萝卜素作为添加剂抑制有机太阳能电池光氧化的仿生方法

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摘要

Recent efficiency records of organic photovoltaics (OPV) highlight stability as a limiting weakness. Incorporation of stabilizers is a desirable approach for inhibiting degradation—it is inexpensive and readily up-scalable. However, to date, such additives have had limited success. We show that β-carotene (BC), an inexpensive and green, naturally occurring antioxidant, dramatically improves OPV stability. When compared to nonstabilized reference devices, the accumulated power generation of PTB7:[70]PCBM devices in the presence of BC?increases by an impressive factor of 6, due to stabilization of both the burn-in and the lifetime, and by a factor of 21 for P3HT:[60]PCBM devices, owing to a longer lifetime. Using electron spin resonance and time-resolved near-IR emission spectroscopies, we probed radical and singlet oxygen concentrations. We demonstrate that singlet oxygen sensitized by [70]PCBM causes the “burn-in” of PTB7:[70]PCBM devices and that BC effectively mitigates it. Our results provide an effective solution to the problem that currently limits widespread use of OPV.
机译：最近有机光伏（OPV）的效率记录突出显示稳定性，作为限制弱点。稳定剂的掺入是抑制降解的理想方法 - 它是便宜的且易于升级的方法。然而，迄今为止，这种添加剂的成功取得有限。我们表明β-胡萝卜素（BC），廉价和绿色，天然存在的抗氧化剂，显着提高了OPV稳定性。与非硼化的参考装置相比，PTB7的累积发电：[70] PCBM器件在BC存在下的存在λ中的令人印象深刻的6个系数，由于燃烧和寿命稳定，以及因子21对于P3HT：[60] PCBM设备，由于更长的寿命。采用电子自旋共振和时间分辨接近红外发射光谱，我们探测了自由基和单态氧浓度。我们证明了通过[70] PCBM致敏的单线氧，导致PTB7：[70] PCBM设备的“燃烧”，并且BC有效地减轻了它。我们的结果为目前限制了opv广泛使用的问题提供了有效的解决方案。

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