High-efficiency organic solar cells prepared using a halogen-free solution process

Febrian Tri Adhi Wibowo, Narra Vamsi Krishna, Septy Sinaga, Seung Je Lee, Wisnu Tantyo Hadmojo, Young Rag Do, Sung Yeon Jang*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    14 Scopus citations

    Abstract

    Although the power conversion efficiency (PCE) of organic photovoltaic (OPV) devices has recently improved to more than 16%, halogenated solution processes are typically employed to obtain optimal performance. However, halogenated processing is harmful to health and the environment, which can be a significant obstacle to commercialization. Therefore, development of active materials processable under halogen-free conditions is of great importance in this field. In this study, a 16.04% OPV device, processed under halogen-free conditions, is developed by employing a new active-blend system, PBDTTPD-HT:BTP-2F-BO. It is highly soluble in halogen-free solvents, forming a preferential bulk-heterojunction morphology. The PBDTTPD-HT:BTP-2F-BO device achieves a PCE comparable with current state-of-the-art devices based on PBDB-TF:BTP-4F (also known as PM6:Y6) using a conventional halogenated process (16.40% versus 16.33%). Furthermore, it demonstrates a significantly higher PCE than the PBDB-TF:BTP-4F device with a halogen-free process (16.04% versus 9.70%).

    Original languageEnglish (US)
    Article number100517
    JournalCell Reports Physical Science
    Volume2
    Issue number8
    DOIs
    StatePublished - Aug 18 2021

    Bibliographical note

    Funding Information:
    The authors gratefully acknowledge support from National Research Foundation (NRF) grants funded by the Ministry of Science, ICT & Future Planning of Korea ( 2016R1A5A1012966 , 2019R1A2C2087218 , and 2020M1A2A2080746 ).

    Funding Information:
    The authors gratefully acknowledge support from National Research Foundation (NRF) grants funded by the Ministry of Science, ICT & Future Planning of Korea (2016R1A5A1012966, 2019R1A2C2087218, and 2020M1A2A2080746). The work was conceived by F.T.A.W. and S.-Y.J. The experiments were performed by F.T.A.W. N.V.K. S.S. and W.T.H. under guidance of S.-Y.J. and Y.R.D. The polymer donors were synthesized and characterized by F.T.A.W. The small-molecule acceptors were synthesized and characterized by N.V.K. and S.S. The devices were fabricated and characterized by F.T.A.W. and W.T.H. The anti-reflection layers were prepared by S.L. The manuscript was written by F.T.A.W. and S.-Y.J. with comments and input from all authors. The authors declare no competing interests.

    Publisher Copyright:
    © 2021 The Authors

    Keywords

    • efficiency
    • halogen-free
    • organic photovoltaic
    • polymer donor
    • small molecule acceptor

    ASJC Scopus subject areas

    • General Physics and Astronomy
    • General Materials Science
    • General Chemistry
    • General Energy
    • General Engineering

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