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Improving Cooperative Interactions Between Halogenated Aromatic Additives and Aromatic Side Chain Acceptors for Realizing 19.22% Efficiency Polymer Solar Cells
Small ( IF 13.0 ) Pub Date : 2023-04-28 , DOI: 10.1002/smll.202302127 Guowei Wu 1 , Xiaopeng Xu 1 , Chentong Liao 1 , Liyang Yu 1 , Ruipeng Li 2 , Qiang Peng 1
Small ( IF 13.0 ) Pub Date : 2023-04-28 , DOI: 10.1002/smll.202302127 Guowei Wu 1 , Xiaopeng Xu 1 , Chentong Liao 1 , Liyang Yu 1 , Ruipeng Li 2 , Qiang Peng 1
Affiliation
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Processing additive plays an important role in the standard operation procedures for fabricating top performing polymer solar cells (PSCs) through efficient interactions with key photovoltaic materials. However, improving interaction study of acceptor materials to high performance halogenated aromatic additives such as diiodobenzene (DIB) is a widely neglected route for molecular engineering toward more efficient device performances. In this work, two novel Y-type acceptor molecules of BTP-TT and BTP-TTS with different aromatic side chains on the outer positions are designed and synthesized. The resulting aromatic side chains significantly enhanced the interactions between the acceptor molecules and DIB through an arene/halogenated arene interaction, which improved the crystallinity of the acceptor molecules and induced a polymorph with better photovoltaic performances. Thus, high power conversion efficiencies (PCEs) of 18.04% and 19.22% are achieved in binary and ternary blend devices using BTP-TTS as acceptor and DIB as additive. Aromatic side chain engineering for improving additive interactions is proved to be an effective strategy for achieving much higher performance photovoltaic materials and devices.
中文翻译：
改善卤代芳香族添加剂与芳香族侧链受体之间的协同相互作用，实现 19.22% 效率的聚合物太阳能电池
通过与关键光伏材料的有效相互作用，加工添加剂在制造高性能聚合物太阳能电池（PSC）的标准操作程序中发挥着重要作用。然而，改进受体材料与高性能卤化芳香族添加剂（例如二碘苯（DIB））的相互作用研究是分子工程实现更高效器件性能的一条被广泛忽视的途径。本工作设计并合成了两种外部具有不同芳香侧链的新型Y型受体分子BTP-TT和BTP-TTS。由此产生的芳香族侧链通过芳烃/卤代芳烃相互作用显着增强了受体分子与DIB之间的相互作用，从而提高了受体分子的结晶度并诱导出具有更好光伏性能的多晶型物。因此，使用 BTP-TTS 作为受体和 DIB 作为添加剂的二元和三元共混器件可实现 18.04% 和 19.22% 的高功率转换效率 (PCE)。用于改善添加剂相互作用的芳香侧链工程被证明是实现更高性能光伏材料和器件的有效策略。
更新日期：2023-04-28
中文翻译：
改善卤代芳香族添加剂与芳香族侧链受体之间的协同相互作用，实现 19.22% 效率的聚合物太阳能电池
通过与关键光伏材料的有效相互作用，加工添加剂在制造高性能聚合物太阳能电池（PSC）的标准操作程序中发挥着重要作用。然而，改进受体材料与高性能卤化芳香族添加剂（例如二碘苯（DIB））的相互作用研究是分子工程实现更高效器件性能的一条被广泛忽视的途径。本工作设计并合成了两种外部具有不同芳香侧链的新型Y型受体分子BTP-TT和BTP-TTS。由此产生的芳香族侧链通过芳烃/卤代芳烃相互作用显着增强了受体分子与DIB之间的相互作用，从而提高了受体分子的结晶度并诱导出具有更好光伏性能的多晶型物。因此，使用 BTP-TTS 作为受体和 DIB 作为添加剂的二元和三元共混器件可实现 18.04% 和 19.22% 的高功率转换效率 (PCE)。用于改善添加剂相互作用的芳香侧链工程被证明是实现更高性能光伏材料和器件的有效策略。
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