Functionality of Non‐Fullerene Electron Acceptors in Ternary Organic Solar Cells
Functionality of Non‐Fullerene Electron Acceptors in Ternary Organic Solar Cells
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DOI：
10.1002/solr.201900322
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发表时间：
2019-12
期刊：
影响因子：
7.9
通讯作者：
T. Zhu;Luyao Zheng;Zuo Xiao;Xianyi Meng;Lei Liu;Liming Ding;X. Gong
中科院分区：
文献类型：
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作者：
T. Zhu;Luyao Zheng;Zuo Xiao;Xianyi Meng;Lei Liu;Liming Ding;X. Gong
三元有机太阳能电池是由三种不同组分组成的单一活性层，被证明是实现高性能有机太阳能电池的最有效方法之一。尽管如此，大多数三元有机太阳能电池的特征在于稳态测量，这有助于但不足以充分理解短时间尺度下的潜在电荷载流子行为。在本文中，稳态和时间依赖性测量的比较用于研究三元有机太阳能电池中非富勒烯电子受体的功能。稳态测量表明，非富勒烯电子受体扩大了光活性层的吸收范围，抑制了电荷载流子复合，降低了电荷载流子转移电阻，从而增加了三元有机太阳能电池中的光电流。与时间相关的测量表明，短的电荷载流子提取时间和高的电荷载流子迁移率是三元有机太阳能电池中光电流增强的原因。本文提供了理解三元有机太阳能电池的效率提高的基础的综合方法。
Ternary organic solar cells, a single active layer comprising three different components, are demonstrated to be one of the most efficient ways to approach high‐performance organic solar cells. But nevertheless, most of the ternary organic solar cells are characterized by steady‐state measurements, which are helpful but inadequate to fully understand the underlying charge carrier behavior at a short time scale. Herein, a comparison of the steady‐state and time‐dependent measurements is used to investigate the functionality of non‐fullerene electron acceptors in ternary organic solar cells. The steady‐state measurements indicate that non‐fullerene electron acceptors enlarge the absorption range of the photoactive layer, suppress charge carrier recombination, reduce charge carrier transfer resistance, and thereby increase photocurrent in ternary organic solar cells. The time‐dependent measurements demonstrate that a short charge carrier extraction time and a high charge carrier mobility are responsible for enhanced photocurrent in ternary organic solar cells. A comprehensive method understanding the underlying of enhanced efficiency of ternary organic solar cells is provided herein.