Tailoring the Molecular Planarity of Perylene Diimide-Based Third Component toward Efficient Ternary Organic Solar Cells,Small

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Tailoring the Molecular Planarity of Perylene Diimide-Based Third Component toward Efficient Ternary Organic Solar Cells
Small ( IF 13.0 ) Pub Date : 2024-03-26 , DOI: 10.1002/smll.202401176
Yuxiang Li ₁ , Jiaqi Ren ₁ , Shujuan Liu ₂ , Baofeng Zhao ₂ , Zezhou Liang ₃ , Min Hun Jee ₄ , Hongmei Qin ₁ , Wenyan Su ₁ , Han Young Woo ₄ , Chao Gao ₂

Affiliation

Incorporating a third component into binary organic solar cells (b-OSCs) has provided a potential platform to boost power conversion efficiency (PCEs). However, gaining control over the non-equilibrium blend morphology via the molecular design of the perylene diimide (PDI)-based third component toward efficient ternary organic solar cells (t-OSCs) still remains challenging. Herein, two novel PDI derivatives are developed with tailored molecular planarity, namely ufBTz-2PDI and fBTz-2PDI, as the third component for t-OSCs. Notably, after performing a cyclization reaction, the twisted ufBTz-2PDI with an amorphous character transferred to the highly planar fBTz-2PDI followed by a semi-crystalline character. When incorporating the semi-crystalline fBTz-2PDI into the D18:L8-BO system, the resultant t-OSC achieved an impressive PCE of 18.56%, surpassing the 17.88% attained in b-OSCs. In comparison, the addition of amorphous ufBTz-2PDI into the binary system facilitates additional charge trap sites and results in a deteriorative PCE of 14.37%. Additionally, The third component fBTz-2PDI possesses a good generality in optimizing the PCEs of several b-OSCs systems are demonstrated. The results not only provided a novel A-DA'D-A motif for further designing efficient third component but also demonstrated the crucial role of modulated crystallinity of the PDI-based third component in optimizing PCEs of t-OSCs.

中文翻译：

调整苝二酰亚胺基第三组分的分子平面度以实现高效三元有机太阳能电池

将第三种组件纳入二元有机太阳能电池（b-OSC）中，为提高功率转换效率（PCE）提供了一个潜在的平台。然而，通过基于苝二酰亚胺（PDI）的第三组分的分子设计来控制非平衡共混形态以实现高效三元有机太阳能电池（t-OSC）仍然具有挑战性。在此，开发了两种具有定制分子平面性的新型 PDI 衍生物，即 ufBTz-2PDI 和 fBTz-2PDI，作为 t-OSC 的第三种成分。值得注意的是，在进行环化反应后，具有非晶特性的扭曲ufBTz-2PDI转移到高度平面的fBTz-2PDI，随后具有半晶特性。当将半晶 fBTz-2PDI 纳入 D18:L8-BO 系统时，所得的 t-OSC 达到了 18.56% 的令人印象深刻的 PCE，超过了 b-OSC 所达到的 17.88%。相比之下，在二元系统中添加非晶 ufBTz-2PDI 有助于增加电荷陷阱位点，导致 PCE 下降 14.37%。此外，第三个组件fBTz-2PDI在优化多个b-OSC系统的PCE方面具有良好的通用性。结果不仅为进一步设计高效的第三组分提供了新的A-DA'DA基序，而且证明了基于PDI的第三组分的调制结晶度在优化t-OSC的PCE中的关键作用。

更新日期：2024-03-26

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