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Tuning Morphology of Active Layer by using a Wide Bandgap Oligomer-Like Donor Enables Organic Solar Cells with Over 18% Efficiency
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2022-03-11 , DOI: 10.1002/aenm.202104060
Wanying Feng 1 , Simin Wu 1 , Hongbin Chen 1 , Lingxian Meng 1 , Fangfang Huang 1 , Huazhe Liang 1 , Jianqi Zhang 2 , Zhixiang Wei 2 , Xiangjian Wan 1 , Chenxi Li 1 , Zhaoyang Yao 1 , Yongsheng Chen 1
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2022-03-11 , DOI: 10.1002/aenm.202104060
Wanying Feng 1 , Simin Wu 1 , Hongbin Chen 1 , Lingxian Meng 1 , Fangfang Huang 1 , Huazhe Liang 1 , Jianqi Zhang 2 , Zhixiang Wei 2 , Xiangjian Wan 1 , Chenxi Li 1 , Zhaoyang Yao 1 , Yongsheng Chen 1
Affiliation
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A wide bandgap oligomer-like donor CNS-6-8 is synthesized and incorporated into the host PM6:Y6:PC71BM system to tune the morphology of the active layer for better device performance. Due to the good miscibility of CNS-6-8 with both host donor (PM6) and acceptors (Y6 and PC71BM), an optimized morphology is achieved with the appropriate phase separation size and enhanced crystallinity, which ultimately leads to more efficient exciton dissociation, charge transport, and lower nonradiative energy loss. As a result, the quaternary device achieves an improved efficiency of 18.07%, with a simultaneously increased open circuit voltage of 0.868 V, fill factor of 78.8%, and the comparable short-circuit current density of 26.43 mA cm−2. This work indicates that the favorable 3D interpenetrating network morphology of Y6 containing blend films can be optimized by introducing small amount of a specific molecule with high crystallinity, thus providing an effective strategy to achieve better photovoltaic performance for state-of-the-art Y6 analogs-based organic solar cells.
中文翻译：
通过使用宽带隙类低聚物供体调整有源层的形态，使有机太阳能电池的效率超过 18%
合成了宽禁带低聚物类供体CNS-6-8，并将其结合到宿主PM6：Y6：PC 71 BM系统中，以调整有源层的形态以获得更好的器件性能。由于CNS-6-8与宿主供体 ( PM6 ) 和受体 ( Y6和PC 71 BM ) 具有良好的混溶性)，通过适当的相分离尺寸和增强的结晶度实现了优化的形态，最终导致更有效的激子离解、电荷传输和更低的非辐射能量损失。因此，四元器件的效率提高了 18.07%，同时开路电压提高了 0.868 V，填充因子提高了 78.8%，短路电流密度达到了 26.43 mA cm -2。这项工作表明，可以通过引入少量具有高结晶度的特定分子来优化含Y6共混膜的有利 3D 互穿网络形态，从而为最先进的Y6实现更好的光伏性能提供有效策略。基于类似物的有机太阳能电池。
更新日期：2022-03-11
中文翻译：
通过使用宽带隙类低聚物供体调整有源层的形态，使有机太阳能电池的效率超过 18%
合成了宽禁带低聚物类供体CNS-6-8，并将其结合到宿主PM6：Y6：PC 71 BM系统中，以调整有源层的形态以获得更好的器件性能。由于CNS-6-8与宿主供体 ( PM6 ) 和受体 ( Y6和PC 71 BM ) 具有良好的混溶性)，通过适当的相分离尺寸和增强的结晶度实现了优化的形态，最终导致更有效的激子离解、电荷传输和更低的非辐射能量损失。因此，四元器件的效率提高了 18.07%，同时开路电压提高了 0.868 V，填充因子提高了 78.8%，短路电流密度达到了 26.43 mA cm -2。这项工作表明，可以通过引入少量具有高结晶度的特定分子来优化含Y6共混膜的有利 3D 互穿网络形态，从而为最先进的Y6实现更好的光伏性能提供有效策略。基于类似物的有机太阳能电池。
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