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    Engineering of dendritic dopant-free hole transport molecules: enabling ultrahigh fill factor in perovskite solar cells with optimized dendron construction

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    engineering...Sci-China-Chem-s11426-020-9857-1_manu.pdf
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    Type
    Article
    Authors
    Chen, Wei
    Wang, Yang
    Liu, Bin
    Gao, Yajun
    Wu, Ziang
    Shi, Yongqiang
    Tang, Yumin
    Yang, Kun
    Zhang, Yujie
    Sun, Weipeng
    Feng, Xiyuan
    Laquai, Frédéric cc
    Woo, Han Young
    Djurišić, Aleksandra B.
    Guo, Xugang
    He, Zhubing
    KAUST Department
    Physical Science and Engineering (PSE) Division
    Material Science and Engineering Program
    KAUST Solar Center (KSC)
    Date
    2020-10-15
    Online Publication Date
    2020-10-15
    Print Publication Date
    2021-01
    Embargo End Date
    2021-10-17
    Submitted Date
    2020-07-07
    Permanent link to this record
    http://hdl.handle.net/10754/665712
    
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    Abstract
    Developing dopant-free hole-transporting materials (HTMs) for high-performance perovskite solar cells (PVSCs) has been a very active research topic in recent years since HTMs play a critical role in optimizing interfacial charge carrier kinetics and in turn determining device performance. Here, a novel dendritic engineering strategy is first utilized to design HTMs with a D-A type molecular framework, and diphenylamine and/or carbazole is selected as the building block for constructing dendrons. All HTMs show good thermal stability and excellent film morphology, and the key optoelectronic properties could be fine-tuned by varying the dendron structure. Among them, MPA-Cz-BTI and MCz-Cz-BTI exhibit an improved interfacial contact with the perovskite active layer, and non-radiative recombination loss and charge transport loss can be effectively suppressed. Consequently, high power conversion efficiencies (PCEs) of 20.8% and 21.35% are achieved for MPA-Cz-BTI and MCz-Cz-BTI based devices, respectively, accompanied by excellent long-term storage stability. More encouragingly, ultrahigh fill factors of 85.2% and 83.5% are recorded for both devices, which are among the highest values reported to date. This work demonstrates the great potential of dendritic materials as a new type of dopant-free HTMs for high-performance PVSCs with excellent FF.
    Citation
    Chen, W., Wang, Y., Liu, B., Gao, Y., Wu, Z., Shi, Y., … He, Z. (2020). Engineering of dendritic dopant-free hole transport molecules: enabling ultrahigh fill factor in perovskite solar cells with optimized dendron construction. Science China Chemistry. doi:10.1007/s11426-020-9857-1
    Sponsors
    This work was supported by the National Natural Science Foundation of China (21805128, 21774055, 61775091), Shenzhen Key Laboratory Project (ZDSYS201602261933302), Shenzhen Innovation Committee (JCYJ20180504165851864), Shenzhen Innovation Committee (JCYJ20170818141216288), and the Seed Funding for Strategic Interdisciplinary Research Scheme of the University of Hong Kong. We are grateful to the assistance of SUSTech Core Research Facilities.
    Publisher
    Springer Nature
    Journal
    Science China Chemistry
    DOI
    10.1007/s11426-020-9857-1
    Additional Links
    http://link.springer.com/10.1007/s11426-020-9857-1
    ae974a485f413a2113503eed53cd6c53
    10.1007/s11426-020-9857-1
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Solar Center (KSC)

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