The Role of Processing Solvent on Morphology Optimization for Slot-Die Printed Organic Photovoltaics

作     者：Lei Wang Jun-Zhe Zhan Wen-Kai Zhong Lei Zhu Guan-Qing Zhou Tian-Yu Hao Ye-Cheng Zou Zhen-Hua Wang Gang Wei Yong-Ming Zhang Feng Liu Lei Wang;Jun-Zhe Zhan;Wen-Kai Zhong;Lei Zhu;Guan-Qing Zhou;Tian-Yu Hao;Ye-Cheng Zou;Zhen-Hua Wang;Gang Wei;Yong-Ming Zhang;Feng Liu

作者机构：School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Frontiers Science Center for Transformative MoleculesCenter of Hydrogen ScienceSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai200240China State Key Laboratory of Fluorinated Functional Membrane Materials and Dongyue Future Hydrogen Energy Materials CompanyZibo 256401China 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2023年第41卷第6期

页      面：842-850,I0005页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51973110,21734009,21905102 and 22109094) the Program of Shanghai Science and Technology Commission science and technology innovation action plan(Nos.20ZR1426200,20511103800,20511103802 and 20511103803) the Natural Science Foundation of Shandong Province(No.ZR2019LFG005) the Key research project of Shandong Province(No.2020CXGC010403) the Center of Hydrogen Science,Shanghai Jiao Tong University,China 

主　　题：crystallization chloroform film 

摘      要：The morphology manipulation of the active layers is important for improving the performance of organic photovoltaics(OPVs).The choice of processing solvent has great impact on the crystallization and phase separation during film formation,since solvent properties,including solvent effect on molecular crystallization,boiling point,and interaction parameters,can directly change the evolution pathways associated with thermodynamics and ***,revealing the underlying solvent-regulated morphology mechanism is potential to provide guiding strategies for device *** this study,chloroform,chlorobenzene,and toluene are used to process PM6:Y6 blends by slot-die printing to fabricate OPV *** chloroform printed film forms a fibrillar network morphology with enhanced crystallization,facilitating exciton dissociation,charge transport and extraction,resulting in an optimal power conversion efficiency of 16.22%.However,the addition of the additive chloronaphthalene in chloroform solution leads to over-crystallization of Y6,and thus,increasing domain size that exceeds the exciton diffusion length,resulting in lower device *** addition,both the chlorobenzene and toluene suppress the crystallization of Y6,which drastically decreased short-circuit current and fill *** results demonstrate the important role of processing solvent in dictating film morphology,which critically connects with the resultant printed OPV performance.