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Chalcogen‐Fused Perylene Diimides‐Based Nonfullerene Acceptors for High‐Performance Organic Solar Cells: Insight into the Effect of O, S, and Se
Solar RRL ( IF 6.0 ) Pub Date : 2019-12-12 , DOI: 10.1002/solr.201900453 Gang Li 1 , Shuaihua Wang 1 , Dandan Li 1 , Tao Liu 1, 2 , Cenqi Yan 1 , Jiewei Li 3 , Wenbin Yang 1 , Zhenghui Luo 2 , Ruijie Ma 2 , Xinyu Wang 1 , Guanwei Cui 1 , Yilin Wang 4 , Wei Ma 4 , Lijun Huo 5 , Kai Chen 6 , He Yan 2 , Bo Tang 1
Solar RRL ( IF 6.0 ) Pub Date : 2019-12-12 , DOI: 10.1002/solr.201900453 Gang Li 1 , Shuaihua Wang 1 , Dandan Li 1 , Tao Liu 1, 2 , Cenqi Yan 1 , Jiewei Li 3 , Wenbin Yang 1 , Zhenghui Luo 2 , Ruijie Ma 2 , Xinyu Wang 1 , Guanwei Cui 1 , Yilin Wang 4 , Wei Ma 4 , Lijun Huo 5 , Kai Chen 6 , He Yan 2 , Bo Tang 1
Affiliation
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Three perylene diimide (PDI) tetramers annulated by oxygen (O), sulfur (S), and selenium (Se), named as SF‐4PDI‐O, SF‐4PDI‐S, and SF‐4PDI‐Se, are designed, synthesized, and paired with polymeric donor PDBT‐T1 to construct organic solar cells. The heteroatoms' effects on photoelectric properties, chemical geometry, charge transport, active‐layer morphology, and photovoltaic performance are investigated in detail. These PDI acceptors exhibit a similar absorption profile, whereas the highest occupied molecular orbitals and lowest unoccupied molecular orbitals are simultaneously upshifted when heteroatoms are altered from O and S to Se due to the gradually weakening electronegativity. Alongside PDBT‐T1, SF‐4PDI‐O achieves an outstanding power conversion efficiency of 8.904% with a high fill factor of 0.706, outcompeting its S‐annulated and Se‐annulated counterparts. The superiority of the PDBT‐T1:SF‐4PDI‐O system lies in its stronger crystallinity, more balanced hole and electron mobilities, and weaker bimolecular recombination, coupled with more efficient charge transfer and collection. These results shed light on the invention of high‐performance PDI acceptors by oxygen‐decorated methodology.
中文翻译：
基于硫属元素的Per二酰亚胺基非富勒烯受体用于高性能有机太阳能电池：深入研究O，S和Se的作用
设计，合成了由氧（O），硫（S）和硒（Se）退火的三per二酰亚胺（PDI）四聚体，分别命名为SF-4PDI-O，SF-4PDI-S和SF-4PDI-Se ，并与聚合物供体PDBT-T1配对以构建有机太阳能电池。详细研究了杂原子对光电性能，化学几何形状，电荷传输，活性层形态和光伏性能的影响。这些PDI受体表现出相似的吸收曲线，而当杂原子由于逐渐减弱的电负性而从O和S变为Se时，最高占据的分子轨道和最低的未占据的分子轨道同时上移。与PDBT-T1一起，SF-4PDI-O的功率转换效率达到了8.904％，填充系数高达0.706，胜过其S环和Se环的同类产品。PDBT-T1：SF-4PDI-O系统的优势在于其更强的结晶度，更平衡的空穴和电子迁移率以及较弱的双分子重组，以及更高效的电荷转移和收集。这些结果为用氧气装饰方法发明高性能PDI受体提供了启示。
更新日期：2019-12-12
中文翻译：
基于硫属元素的Per二酰亚胺基非富勒烯受体用于高性能有机太阳能电池：深入研究O，S和Se的作用
设计，合成了由氧（O），硫（S）和硒（Se）退火的三per二酰亚胺（PDI）四聚体，分别命名为SF-4PDI-O，SF-4PDI-S和SF-4PDI-Se ，并与聚合物供体PDBT-T1配对以构建有机太阳能电池。详细研究了杂原子对光电性能，化学几何形状，电荷传输，活性层形态和光伏性能的影响。这些PDI受体表现出相似的吸收曲线，而当杂原子由于逐渐减弱的电负性而从O和S变为Se时，最高占据的分子轨道和最低的未占据的分子轨道同时上移。与PDBT-T1一起，SF-4PDI-O的功率转换效率达到了8.904％，填充系数高达0.706，胜过其S环和Se环的同类产品。PDBT-T1：SF-4PDI-O系统的优势在于其更强的结晶度，更平衡的空穴和电子迁移率以及较弱的双分子重组，以及更高效的电荷转移和收集。这些结果为用氧气装饰方法发明高性能PDI受体提供了启示。
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