增强且平衡的电荷传输助力三元太阳能电池效率超过17% 。
Enhanced and Balanced Charge Transport Boosting Ternary Solar Cells Over 17% Efficiency.
作者信息
Li Danqin, Zhu Lei, Liu Xianjie, Xiao Wei, Yang Jianming, Ma Ruru, Ding Liming, Liu Feng, Duan Chungang, Fahlman Mats, Bao Qinye
机构信息
Key Laboratory of Polar Materials and Devices, Department of Electronic Science, School of Physics and Electronic Science, East China Normal University, Shanghai, 200241, P. R. China.
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200025, P. R. China.
出版信息
Adv Mater. 2020 Aug;32(34):e2002344. doi: 10.1002/adma.202002344. Epub 2020 Jul 19.
Ternary architecture is one of the most effective strategies to boost the power conversion efficiency (PCE) of organic solar cells (OSCs). Here, an OSC with a ternary architecture featuring a highly crystalline molecular donor DRTB-T-C4 as a third component to the host binary system consisting of a polymer donor PM6 and a nonfullerene acceptor Y6 is reported. The third component is used to achieve enhanced and balanced charge transport, contributing to an improved fill factor (FF) of 0.813 and yielding an impressive PCE of 17.13%. The heterojunctions are designed using so-called pinning energies to promote exciton separation and reduce recombination loss. In addition, the preferential location of DRTB-T-C4 at the interface between PM6 and Y6 plays an important role in optimizing the morphology of the active layer.
三元结构是提高有机太阳能电池（OSC）功率转换效率（PCE）最有效的策略之一。在此，报道了一种具有三元结构的OSC，其以高度结晶的分子供体DRTB-T-C4作为第三组分加入到由聚合物供体PM6和非富勒烯受体Y6组成的主体二元体系中。第三组分用于实现增强且平衡的电荷传输，有助于提高填充因子（FF）至0.813，并产生令人印象深刻的17.13%的功率转换效率。利用所谓的钉扎能量设计异质结以促进激子分离并减少复合损失。此外，DRTB-T-C4在PM6和Y6之间的界面处的优先定位在优化活性层的形态方面起着重要作用。
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