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

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

doi:10.1007/s10118-022-2866-2

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

RESEARCH ARTICLE | Updated：2023-05-26

- The Role of Processing Solvent on Morphology Optimization for Slot-Die Printed Organic Photovoltaics
- Chinese Journal of Polymer Science Vol. 41, Issue 6, Pages: 842-850(2023)
- Affiliations：
  
  a.School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
  b.Frontiers Science Center for Transformative Molecules, Center of Hydrogen Science, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  c.State Key Laboratory of Fluorinated Functional Membrane Materials and Dongyue Future Hydrogen Energy Materials Company, Zibo 256401, China
- Author bio：
  
  zhulei1130@outlook.com (L.Z.)
  fengliu82@sjtu.edu.cn (F.L.)
- Funds：
- DOI：10.1007/s10118-022-2866-2
  CLC：
- Received：26 June 2022，
  
  Revised：2022-8-9，
  
  Accepted：06 September 2022，
  
  Online First：20 October 2022，
  
  Published：01 June 2023
- Accepted：
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Wang, L.; Zhan, J. Z.; Zhong, W. K.; Zhu, L.; Zhou, G. Q.; Hao, T. Y.; Zou, Y. C.; Wang, Z. H.; Wei, G.; Zhang, Y. M.; Liu, F. The role of processing solvent on morphology optimization for slot-die printed organic photovoltaics. Chinese J. Polym. Sci. 2023, 41, 842–850

Lei Wang, Jun-Zhe Zhan, Wen-Kai Zhong, et al. The Role of Processing Solvent on Morphology Optimization for Slot-Die Printed Organic Photovoltaics[J]. Chinese Journal of Polymer Science, 2023, 41(6): 842-850.
Wang, L.; Zhan, J. Z.; Zhong, W. K.; Zhu, L.; Zhou, G. Q.; Hao, T. Y.; Zou, Y. C.; Wang, Z. H.; Wei, G.; Zhang, Y. M.; Liu, F. The role of processing solvent on morphology optimization for slot-die printed organic photovoltaics. Chinese J. Polym. Sci. 2023, 41, 842–850 DOI： 10.1007/s10118-022-2866-2.

Lei Wang, Jun-Zhe Zhan, Wen-Kai Zhong, et al. The Role of Processing Solvent on Morphology Optimization for Slot-Die Printed Organic Photovoltaics[J]. Chinese Journal of Polymer Science, 2023, 41(6): 842-850. DOI： 10.1007/s10118-022-2866-2.

摘要

This work shows the performance of slot-died printed devices processed by different solvents and additive

and points to the effect of three solvent properties (solvent effect on molecular crystallization

boiling point

and interaction parameters) on the film crystallization and phase separation.

Abstract

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 kinetics. Therefore

revealing the underlying solvent-regulated morphology mechanism is potential to provide guiding strategies for device optimization. In this study

chloroform

chlorobenzene

and toluene are used to process PM6:Y6 blends by slot-die printing to fabricate OPV devices. The 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 efficiency. In addition

both the chlorobenzene and toluene suppress the crystallization of Y6

which drastically decreased short-circuit current and fill factor. These results demonstrate the important role of processing solvent in dictating film morphology

which critically connects with the resultant printed OPV performance.

关键词

Keywords

references

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