Chlorination and Position Isomerization to Enhance the Photovoltaic Performance of Polymer Donors
Substitution of chlorine in a conjugated side chain is a simple and effective method with which to improve the photoelectronic properties of polymer donors. The chlorination and chlorine-substituted position affects the photovoltaic performance of organic solar cells. Herein, the polymers PBDQx-β-H, PBDQx-β-Cl, and PBDQx-α-Cl based on a quinoxaline (Qx) unit were synthesized. The effects of the chlorination and its position isomerization of thiophene side chain on material performance were systematically investigated. After the introduction of a Cl atom at the β-position, the PBDQx-β-Cl achieves dramatically enhanced absorption and aggregation abilities compared with PBDQx-β-H. When the Cl atom is in the α position, a better backbone planarity of PBDQx-α-Cl is assumed and the polymer PBDQx-α-Cl exhibits the much stronger absorption and further improved molecular aggregation in comparison with PBDQx-β-Cl. Meanwhile, when blended with an acceptor, Y6, the PBDQx-α-Cl-based blend film shows a more suitable nanoscale phase separation morphology. Consequently, PBDQx-α-Cl:Y6-based devices achieve an excellent power conversion efficiency of 15.24% with a synchronously promoted open-circuit voltage (V), short-circuit current density (J), and fill factor (FF). These are much higher than those achieved by the PBDQx-β-H-based devices (7.73%). These results show that the dual strategy of chlorination and position isomerization is a promising approach with which to gradually design and synthesize highly efficient polymer donors.
NI Journal Papers ; NI论文
First ; Corresponding
National Natural Science Foundation of China["21975115","22225504"] ; Shenzhen Fundamental Research Program["JCYJ20200109140801751","JCYJ20210324120010028"] ; Guangdong Provincial Key Laboratory of Catalysis[2020B121201002]
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Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||Department of Chemistry|
1.Shenzhen Grubbs Institute and Department of Chemistry,Southern University of Science and Technology,Shenzhen,518055,China
2.Guangdong Provincial Key Laboratory of Catalysis,Southern University of Science and Technology,Shenzhen,518055,China
|First Author Affilication||Department of Chemistry; Shenzhen Grubbs Institute|
|Corresponding Author Affilication||Department of Chemistry; Shenzhen Grubbs Institute; Southern University of Science and Technology|
|First Author's First Affilication||Department of Chemistry; Shenzhen Grubbs Institute|
Pu，Mingrui,Zhu，Yiwu,Tan，Pu,et al. Chlorination and Position Isomerization to Enhance the Photovoltaic Performance of Polymer Donors[J]. Macromolecules,2023,56(15):5865-5872.
Pu，Mingrui.,Zhu，Yiwu.,Tan，Pu.,Zhu，Yulin.,Lai，Xue.,...&He，Feng.(2023).Chlorination and Position Isomerization to Enhance the Photovoltaic Performance of Polymer Donors.Macromolecules,56(15),5865-5872.
Pu，Mingrui,et al."Chlorination and Position Isomerization to Enhance the Photovoltaic Performance of Polymer Donors".Macromolecules 56.15(2023):5865-5872.
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