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首页> 外文期刊>Advanced Functional Materials >Performance Optimization of Parallel-Like Ternary Organic Solar Cells through Simultaneous Improvement in Charge Generation and Transport
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Performance Optimization of Parallel-Like Ternary Organic Solar Cells through Simultaneous Improvement in Charge Generation and Transport

机译：通过同时改进电荷生成和传输，优化类似平行三元有机太阳能电池的性能

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摘要

Ternary organic photovoltaic (OPV) devices with multiple light-absorbing active materials have emerged as an efficient strategy for realizing further improvements in the power conversion efficiency (PCE) without building complex multijunction structures. However, the third component often acts as recombination centers and, hence, the optimization of ternary blend morphology poses a major challenge to improving the PCE of these devices. In this work, the performance of OPVs is enhanced through the morphological modification of nonfullerene acceptor (NFA)-containing binary active layers. This modification is achieved by incorporating fullerenes into the layers. The uniformly dispersed fullerenes are sufficiently continuous and successfully mediate the ordering of N FA without charge or energy transfer. Owing to the simultaneous improvement in the charge generation and extraction, the PCE (12.1%) of these parallel-linked ternary devices is considerably higher than those of the corresponding binary devices (9.95% and 7.78%). Moreover, the additional energy loss of the ternary device is minimized, compared with that of the NFA-based binary device, due to the judicious control of the effective donor:acceptor composition of the ternary blends.
机译：具有多种吸光活性材料的三元有机光伏（OPV）器件已成为一种有效的策略，可在不构建复杂的多结结构的情况下实现功率转换效率（PCE）的进一步改善。但是，第三组分经常充当重组中心，因此，三元共混物形态的优化对改善这些器件的PCE提出了重大挑战。在这项工作中，通过对包含非富勒烯受体（NFA）的二元活性层进行形态学修饰，可以提高OPV的性能。通过将富勒烯掺入层中来实现该改性。均匀分散的富勒烯足够连续，可以成功地介导N FA的有序化，而无需电荷或能量转移。由于电荷产生和提取的同时改善，这些并联的三元器件的PCE（12.1％）大大高于相应的二元器件的PCE（9.95％和7.78％）。而且，由于明智地控制了三元混合物的有效供体：受体组成，与基于NFA的二元设备相比，三元设备的额外能量损失得以最小化。

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