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Achieving 17.4% Efficiency of Ternary Organic Photovoltaics with Two Well‐Compatible Nonfullerene Acceptors for Minimizing Energy Loss
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-06-30 , DOI: 10.1002/aenm.202001404 Xiaoling Ma 1 , Jian Wang 2 , Jinhua Gao 1 , Zhenghao Hu 1 , Chunyu Xu 1 , Xiaoli Zhang 3 , Fujun Zhang 1
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-06-30 , DOI: 10.1002/aenm.202001404 Xiaoling Ma 1 , Jian Wang 2 , Jinhua Gao 1 , Zhenghao Hu 1 , Chunyu Xu 1 , Xiaoli Zhang 3 , Fujun Zhang 1
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A power conversion efficiency (PCE) of 16.2% is achieved in PM6:BTP‐4F‐12 based organic photovoltaics (OPVs). On the basis of efficient binary OPVs, a series of ternary OPVs are constructed by incorporating MeIC as the third component. The open circuit voltages (VOCs) of ternary OPVs can be gradually increased along with the incorporation of MeIC, suggesting the formation of an alloy state between BTP‐4F‐12 and MeIC with good compatibility. The energy loss (Eloss) of ternary OPVs can be decreased compared with that of two binary OPVs, contributing to the VOC improvement of ternary OPVs. The short circuit current density (JSC) and fill factor (FF) of ternary OPVs can also be simultaneously enhanced with MeIC content up to 10 wt% in acceptors, leading to 17.4% PCE of the optimized ternary OPVs. The JSC and FF improvement of ternary OPVs is thought to result from the optimized ternary active layers with more efficient photon harvesting, exciton dissociation and charge transport. The 17.4% PCE and 79.2% FF is among the top values of ternary OPVs. This work indicates that a ternary strategy is an emerging method to simultaneously minimize Eloss and optimize photon harvesting as well as improve the morphology of active layers for realizing performance improvement for OPVs.
中文翻译：
通过两个兼容良好的非富勒烯受体，使三元有机光伏效率达到17.4％，可最大程度地减少能量损失
基于PM6：BTP-4F-12的有机光伏（OPV）可实现16.2％的功率转换效率（PCE）。在有效的二进制OPV的基础上，通过结合MeIC作为第三部分来构造一系列三元OPV。随着MeIC的加入，三元OPV的开路电压（V OC s）可以逐渐增加，这表明BTP-4F-12和MeIC之间形成了具有良好相容性的合金态。与两个二元OPV相比，三元OPV的能量损失（E loss）可以降低，有助于改善三元OPV的V OC。短路电流密度（J SC）和三元OPV的填充因子（FF）也可以同时提高，受体中的MeIC含量最高为10 wt％，从而使优化的三元OPV的PCE达到17.4％。三元OPV的J SC和FF改善被认为是由于优化的三元活性层具有更有效的光子收集，激子离解和电荷传输所致。三元OPV的最高值包括17.4％的PCE和79.2％的FF。这项工作表明，三元策略是一种新兴的方法，可以同时最小化E损失并优化光子收集，并改善有源层的形态以实现OPV的性能改善。
更新日期：2020-08-17
中文翻译：
通过两个兼容良好的非富勒烯受体，使三元有机光伏效率达到17.4％，可最大程度地减少能量损失
基于PM6：BTP-4F-12的有机光伏（OPV）可实现16.2％的功率转换效率（PCE）。在有效的二进制OPV的基础上，通过结合MeIC作为第三部分来构造一系列三元OPV。随着MeIC的加入，三元OPV的开路电压（V OC s）可以逐渐增加，这表明BTP-4F-12和MeIC之间形成了具有良好相容性的合金态。与两个二元OPV相比，三元OPV的能量损失（E loss）可以降低，有助于改善三元OPV的V OC。短路电流密度（J SC）和三元OPV的填充因子（FF）也可以同时提高，受体中的MeIC含量最高为10 wt％，从而使优化的三元OPV的PCE达到17.4％。三元OPV的J SC和FF改善被认为是由于优化的三元活性层具有更有效的光子收集，激子离解和电荷传输所致。三元OPV的最高值包括17.4％的PCE和79.2％的FF。这项工作表明，三元策略是一种新兴的方法，可以同时最小化E损失并优化光子收集，并改善有源层的形态以实现OPV的性能改善。
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