Enhanced Performance and Stability of Q-PHJ Devices through Strategic Placement of Dimerized Acceptors,Advanced Functional Materials

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Enhanced Performance and Stability of Q-PHJ Devices through Strategic Placement of Dimerized Acceptors
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-09-21 , DOI: 10.1002/adfm.202305608
Pu Tan ₁ , Hui Chen ₁ , Hengtao Wang ₁ , Xue Lai _{1,

2} , Yulin Zhu _{1,

2} , Xiangyu Shen ₁ , Mingrui Pu ₁ , Hanjian Lai ₁ , Sen Zhang ₃ , Wei Ma ₃ , Feng He _{1,

4}

Affiliation

Oligomeric acceptors are an effective π-conjugate extension for small molecules because they effectively combine the advantages of polymeric and small molecular acceptors. The choice of linker group and oligomer position is however crucial for the efficient expression of π-expansion advantages. Here, vinylene is chosen as the linker group and three oligomeric acceptors are produced with different connecting positions or end-groups. Under illumination, the dimer acceptor dBTIC-γV-BO achieves the best power conversion efficiencies of 17.14% and a T₈₀ lifetime of 2150 h amongst quasi-planar heterojunction devices, which are much higher and more stable than the directly connected dimers dBTICγ-EH or dBTIC-δV-BO. These results indicate that the oligomerization of small molecules with an appropriate linker group in the γ-position is an effective strategy with which to improve the photovoltaic performance and stability of organic solar cells, and significantly promote their commercialization.

中文翻译：

通过二聚化受体的战略布局增强 Q-PHJ 器件的性能和稳定性

寡聚受体是小分子的有效π共轭延伸，因为它们有效地结合了聚合受体和小分子受体的优点。然而，连接基团和寡聚物位置的选择对于 π 扩展优势的有效表达至关重要。在这里，选择亚乙烯基作为连接基团，并产生具有不同连接位置或端基的三个寡聚受体。在光照下，二聚体受体dBTIC-γV-BO在准平面异质结器件中实现了17.14%的最佳功率转换效率和2150 h的T ₈₀寿命，比直接连接的二聚体dBTICγ-EH更高和更稳定或 dBTIC-δV-BO。这些结果表明，在γ位具有适当连接基团的小分子的低聚是提高有机太阳能电池的光伏性能和稳定性并显着促进其商业化的有效策略。

更新日期：2023-09-21

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