An alloy small molecule acceptor for green printing organic solar cells overcoming the scaling lag of efficiency,Energy & Environmental Science

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An alloy small molecule acceptor for green printing organic solar cells overcoming the scaling lag of efficiency
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2022-10-26 , DOI: 10.1039/d2ee03134e
Ji Wan ₁ , Yao Wu ₁ , Rui Sun ₁ , Jiawei Qiao ₂ , Xiaotao Hao ₂ , Jie Min ₁

Affiliation

How to design organic solar cell (OSC) systems with high device efficiency and excellent processing performance is still one of the urgent issues to be solved. Herein, we designed an asymmetric acceptor BTP-F3Cl and incorporated it into the PM1:L8-BO blend. Compared with the L8-BO neat acceptor, the L8-BO:BTP-F3Cl alloy acceptor shows larger exciton diffusion length, higher photoluminescence quantum yield and superior electron mobility. With the introduction of BTP-F3Cl, the red-shifted absorption spectra, the prolonged exciton lifetime, the enhanced charge transport property, and the depressed non-radiative recombination promote the ternary system to obtain improved short-circuit current density and fill factor. Consequently, the ternary device delivers an efficiency of 19.1% (certified as 18.7%), representing one of the highest values reported so far. Moreover, this system can achieve a promising efficiency of approximately 19% in tetrahydrofuran-processed OPV devices fabricated by a blade-coating technology. Importantly, the BTP-F3Cl-introduced ternary system can overcome the scaling lag of device efficiency more effectively than the host system. Overall, this work can effectively guide the lab-to-manufacturing translation of green printing OSCs.

中文翻译：

一种用于绿色印刷有机太阳能电池的合金小分子受体，克服了效率的缩放滞后

如何设计出器件效率高、加工性能优良的有机太阳能电池（OSC）系统仍是亟待解决的问题之一。在此，我们设计了一种不对称受体 BTP-F3Cl，并将其纳入 PM1:L8-BO 混合物中。与L8-BO纯受体相比，L8-BO:BTP-F3Cl合金受体具有更大的激子扩散长度、更高的光致发光量子产率和优异的电子迁移率。随着 BTP-F3Cl 的引入，红移吸收光谱、延长的激子寿命、增强的电荷传输性能和抑制的非辐射复合促进三元体系获得改善的短路电流密度和填充因子。因此，三元器件的效率为 19.1%（经认证为 18.7%），代表迄今为止报告的最高值之一。此外，该系统可以在通过刀片涂层技术制造的四氢呋喃处理的 OPV 器件中实现约 19% 的有希望的效率。重要的是，引入 BTP-F3Cl 的三元系统可以比主机系统更有效地克服设备效率的缩放滞后。总体而言，这项工作可以有效地指导绿色印刷 OSC 从实验室到制造的转化。

更新日期：2022-10-26

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