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  • Royal Society of Chemistry (RSC)  (2)
  • Shang, Luwen  (2)
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  • Royal Society of Chemistry (RSC)  (2)
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  • 1
    Online Resource
    Online Resource
    Efficient and moisture-resistant organic solar cells via simultaneously reducing the surface defects and hydrophilicity of an electron transport layer
    Royal Society of Chemistry (RSC) ; 2021
    In:  Journal of Materials Chemistry C Vol. 9, No. 38 ( 2021), p. 13500-13508
    Details
    In: Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 9, No. 38 ( 2021), p. 13500-13508
    Abstract: Organic solar cells (OSCs) simultaneously featuring good photovoltaic performance and strong humidity resistance are greatly anticipated for their practical application. Herein, we developed a simple organic trisiloxane molecule (denoted as TSi), and applied it to modify sol–gel ZnO (sg-ZnO) films. Compared to pristine sg-ZnO films, the TSi/sg-ZnO film presents fewer surface defects, shallower work function, and stronger hydrophobicity. Benefiting from those improved characteristics, when adopting a benzodifuran (BDF)-based polymer (BDFP-Bz) and Y6 as the electron donor and acceptor to fabricate OSCs, the derived devices utilizing TSi/sg-ZnO as the electron transport layer (ETL) showed suppressed charge recombination, enhanced charge extraction and increased stability to moisture versus the devices based on an sg-ZnO ETL. Meanwhile, PBDFP-Bz:Y6 OSCs based on a TSi/sg-ZnO ETL delivered a higher PCE of 14.62% than that of the control devices (12.39%). More importantly, the TSi/sg-ZnO ETL was also applicable in other different photovoltaic systems, among which PM6:Y6 OSCs based on a TSi/sg-ZnO ETL yielded a superior PCE of 16.37% along with stronger stability to moisture versus the reference ones. Our finding demonstrates the TSi/sg-ZnO bilayer ETL holds promise in the practical application of OSCs for simultaneously improving the photovoltaic performance and moisture-resistance of devices.
    Type of Medium: Online Resource
    ISSN: 2050-7526 , 2050-7534
    URL: Article
    DOI: 10.1039/D1TC03409J
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2021
    detail.hit.zdb_id: 2702245-6
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  • 2
    Online Resource
    Online Resource
    Simple furan-based polymers with the self-healing function enable efficient eco-friendly organic solar cells with high stability
    Royal Society of Chemistry (RSC) ; 2022
    In:  Journal of Materials Chemistry C Vol. 10, No. 2 ( 2022), p. 506-516
    Details
    In: Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 10, No. 2 ( 2022), p. 506-516
    Abstract: Herein, two simple polymers PFO3 and PFO4 based on furan-3-carboxylate and 3-alkylfuran are developed. PFO3 and PFO4 feature high hole mobility, large dielectric constant and good solubility. Compared to PFO4, PFO3 with shorter oligoethylene glycol (OEG) side chains demonstrates a larger absorption coefficient and deeper electronic energy level. The air- and ethanol/water-processed OSCs based on the PFO4:fullerene derivative (PCBO-12) show a modest efficiency of 2.06%. However, PFO3:PCBO-12 OSCs yield a higher efficiency of 3.03% due to the simultaneously enhanced photovoltaic parameters. PFO3- and PFO4-based devices retain 64.5% and 51.2% of their initial efficiency after continuous illumination for 200 h in an inert atmosphere, respectively. Surprisingly, the retained efficiency ratio is increased to 81.6% and 69.1% for PFO3- and PFO4-based devices suffering from discontinuous illumination yet with the same soaking time of 200 h in an inert atmosphere. However, the above phenomenon is not observed for three other photovoltaic systems without abundant OEG groups when adopting discontinuous illumination. Infrared spectroscopy and X-ray photoelectron spectroscopy unravel that the repair efficiency of PFO3- or PFO4-based devices should have resulted from the self-healing of hydrogen bonds in the photoactive layer. Our work will provide guidance for the future design of donor polymers for eco-friendly OSCs featuring high stability.
    Type of Medium: Online Resource
    ISSN: 2050-7526 , 2050-7534
    URL: Article
    DOI: 10.1039/D1TC05111C
    Language: English
    Publisher: Royal Society of Chemistry (RSC)
    Publication Date: 2022
    detail.hit.zdb_id: 2702245-6
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