Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (7): 20230128.doi: 10.7503/cjcu20230128

• Article • Previous Articles     Next Articles

Pre-aggregation Manipulation of Polymer Donor Using Guest Plasticizers for Developing Nonhalogenated Green Solvent Processed High-performance Organic Solar Cells

CHEN Haiyang, LI Xinqi, DING Junyuan, HUANG Yuting, LI Yaowen()   

  1. Suzhou Key Laboratory of Novel Semiconductor?optoelectronics Materials and Devices,College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,China
  • Received:2023-03-23 Online:2023-07-10 Published:2023-05-08
  • Contact: LI Yaowen E-mail:ywli@suda.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(52273188);the National Key Research and Development Program of China(2020YFB1506400);the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(20KJA430010);the Priority Academic Program Development of Jiangsu Higher Education Institutions, China and the National Postdoctoral Program for Innovative Talents, China(BX20220221)

Abstract:

Recent advances in non-fullerene acceptors like Y6 have pushed the power conversion efficiencies(PCEs) of organic solar cells(OSCs) above 19%. However, the harsh fabrication conditions, such as the use of the highly volatile chloroform solvent, are not suitable for large-area printing technologies and environmental standards. Here, a third component(guest) BTP-3Si-4F is designed and synthesized with siloxane repeating units in side chains. The guest BTP-3Si-4F could act as a plasticizer, which inhibits the pre-aggregation behavior of PM6 in nonhalo-genated(toluene) solution and enables the active layer to form a morphology with suitable phase separation scale. Therefore, BTP-3Si-4F blended with PM6∶Y6 and PM6∶BTP-eC9 deliver the highest PCEs of 16.92% and 17.64%, respectively. The results demonstrate controlling the pre-aggregation behavior of donor via guest molecules is an effective and universal way to achieve efficient OSCs in non-halogenated solution.

Key words: Organic solar cell, Plasticizer, Host-guest active layer, Pre-aggregation

CLC Number: 

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