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Defect Passivation in Perovskite Solar Cells Using Polysuccinimide-Based Green Polymer Additives.

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Title: Defect Passivation in Perovskite Solar Cells Using Polysuccinimide-Based Green Polymer Additives.
Authors: Kozlov, Sergey S.1 (AUTHOR), Alexeeva, Olga V.1,2 (AUTHOR) alexol@yandex.ru, Nikolskaia, Anna B.1 (AUTHOR), Petrova, Vasilisa I.1,2 (AUTHOR), Karyagina, Olga K.1 (AUTHOR), Iordanskii, Alexey L.2 (AUTHOR), Larina, Liudmila L.1 (AUTHOR), Shevaleevskiy, Oleg I.1 (AUTHOR)
Source: Polymers (20734360). Mar2025, Vol. 17 Issue 5, p653. 19p.
Subjects: Scanning probe microscopy, Charge carrier lifetime, Solar cells, Surface passivation, Scanning electron microscopy, Perovskite
Abstract: Controlling traps and structural defects in perovskite absorber layers is crucial for enhancing both the device efficiency and long-term stability of perovskite solar cells (PSCs). Here we demonstrate the modification of perovskite films by introducing low-cost green polymers, polysuccinimide (PSI) and polyasparagine (PASP), into the perovskite layer. Structural, morphological and optoelectronic properties of polymer-modified perovskite films were probed by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and UV-Vis spectroscopy. The incorporation of PSI triggers interactions between the polymer and perovskite, leading to the passivation of surface defects at the grain boundaries and improved morphology of perovskite films. This defect passivation boosted PSC performance, providing power conversion efficiency (PCE) values up to 20.1%. An optimal polymer concentration of 0.1 mg/mL in the perovskite precursor solution was identified for an improvement in the photovoltaic performance. It was shown that the primary factor leading to the observed enhancement in the power conversion efficiency for PSI-modified PSCs is the increase in the lifetime of charge carriers due to the efficient passivation of surface defects and suppression of recombination losses. Additionally, PSI-modified PSCs demonstrated enhanced stability, retaining over 80% of their initial efficiency after 40 days of storage under ambient conditions without encapsulation. The obtained results highlight the effectiveness of green polymer additives in passivating surface defects in perovskite films and provide a viable approach for improving the stability and performance of perovskite solar cells. [ABSTRACT FROM AUTHOR]
Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Defect Passivation in Perovskite Solar Cells Using Polysuccinimide-Based Green Polymer Additives.
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  Data: <searchLink fieldCode="DE" term="%22Scanning+probe+microscopy%22">Scanning probe microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Charge+carrier+lifetime%22">Charge carrier lifetime</searchLink><br /><searchLink fieldCode="DE" term="%22Solar+cells%22">Solar cells</searchLink><br /><searchLink fieldCode="DE" term="%22Surface+passivation%22">Surface passivation</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+electron+microscopy%22">Scanning electron microscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Perovskite%22">Perovskite</searchLink>
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  Data: Controlling traps and structural defects in perovskite absorber layers is crucial for enhancing both the device efficiency and long-term stability of perovskite solar cells (PSCs). Here we demonstrate the modification of perovskite films by introducing low-cost green polymers, polysuccinimide (PSI) and polyasparagine (PASP), into the perovskite layer. Structural, morphological and optoelectronic properties of polymer-modified perovskite films were probed by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) and UV-Vis spectroscopy. The incorporation of PSI triggers interactions between the polymer and perovskite, leading to the passivation of surface defects at the grain boundaries and improved morphology of perovskite films. This defect passivation boosted PSC performance, providing power conversion efficiency (PCE) values up to 20.1%. An optimal polymer concentration of 0.1 mg/mL in the perovskite precursor solution was identified for an improvement in the photovoltaic performance. It was shown that the primary factor leading to the observed enhancement in the power conversion efficiency for PSI-modified PSCs is the increase in the lifetime of charge carriers due to the efficient passivation of surface defects and suppression of recombination losses. Additionally, PSI-modified PSCs demonstrated enhanced stability, retaining over 80% of their initial efficiency after 40 days of storage under ambient conditions without encapsulation. The obtained results highlight the effectiveness of green polymer additives in passivating surface defects in perovskite films and provide a viable approach for improving the stability and performance of perovskite solar cells. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Polymers (20734360) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/polym17050653
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        Text: English
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      – SubjectFull: Scanning probe microscopy
        Type: general
      – SubjectFull: Charge carrier lifetime
        Type: general
      – SubjectFull: Solar cells
        Type: general
      – SubjectFull: Surface passivation
        Type: general
      – SubjectFull: Scanning electron microscopy
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      – SubjectFull: Perovskite
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              M: 03
              Text: Mar2025
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