Chinese Chemical Letters ( IF 9.4 ) Pub Date : 2022-04-15 , DOI: 10.1016/j.cclet.2022.04.034
Weichao Zhang 1 , Jianhua Huang 2 , Xiaoyu Lv 3 , Ming Zhang 4 , Wanru Liu 1 , Tianzi Xu 1 , Jun Ning 3 , Alata Hexig 3 , Feng Liu 4 , Aiju Xu 1 , Chuanlang Zhan 1
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Quaternary approach has been receiving more and more attention due to its effectiveness in improving solar cell performance, while synthesis/selection of the fourth component is yet a key issue. Herein, we report a chlorinated phthalimide based donor polymer (namely PhI-Cl) having an ultra-wide bandgap (2.10 eV) and a deep HOMO (−5.58 eV) level. Addition of PhI-Cl as the third component of PM6:Y6 and the fourth of PM6:Y6:PC71BM increases both hole and electron mobilities and gives rise to more balanced charge carriers mobilities. Both the short-circuit current-density and fill-factor are increased and open-circuit voltage is well maintained, delivering 17.0% and 18.1% efficiencies, respectively. These results demonstrate that chlorination on the side thiophene of phthalimide-based donor polymer is a way to make deep HOMO and ultra-wide bandgap donor polymer guest used for highly efficient ternary and quaternary strategies.
中文翻译:
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氯化邻苯二甲酰亚胺聚合物供体作为超宽带隙和深 HOMO 客体用于实现高效聚合物太阳能电池
四元方法因其在提高太阳能电池性能方面的有效性而受到越来越多的关注,而第四组分的合成/选择仍然是一个关键问题。在此,我们报道了一种基于氯化邻苯二甲酰亚胺的供体聚合物(即 PhI-Cl),具有超宽带隙 (2.10 eV) 和深 HOMO (-5.58 eV) 能级。添加 PhI-Cl 作为 PM6:Y6 的第三组分和 PM6:Y6:PC 71的第四组分BM 增加空穴和电子迁移率,并产生更平衡的载流子迁移率。短路电流密度和填充因子均增加,开路电压保持良好,分别提供 17.0% 和 18.1% 的效率。这些结果表明,基于邻苯二甲酰亚胺的供体聚合物在噻吩侧的氯化是一种使深 HOMO 和超宽带隙供体聚合物客体用于高效三元和四元策略的方法。