4-tert-butyl pyridine additive for moisture-resistant wide bandgap perovskite solar cells

Rad, Rafat Rafiei; Ganji, Bahram Azizollah; Taghavinia, Nima

doi:10.1016/j.optmat.2021.111876

Cited by 13 publications

(6 citation statements)

References 22 publications

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“…The selection of new solvents for processing THP is a complicated process as many different factors regarding both the chemical and physical properties of the solvents must be considered, for example, the solubility of the precursors, the vapor pressure of the solvents, and the formation of stable complexes with the organic and inorganic components of the salts. − One possible approach is to search for an additive or a cosolvent forming a strong interaction with tin iodide salts. Pyridines, and in particular 4-( tert -butyl) pyridine (tBP), − are common additives in lead halide perovskites, and can form a stable complex with both Sn(II) and Sn(IV) halides through Sn–N coordination …”

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confidence: 99%

Pyridine Controlled Tin Perovskite Crystallization

et al. 2022

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Controlling the crystallization of perovskite in a thin film is essential in making solar cells. Processing tin-based perovskite films from solution is challenging because of the uncontrollable faster crystallization of tin than the most used lead perovskite. The best performing devices are prepared by depositing perovskite from dimethyl sulfoxide because it slows down the assembly of the tin–iodine network that forms perovskite. However, while dimethyl sulfoxide seems the best solution to control the crystallization, it oxidizes tin during processing. This work demonstrates that 4-( tert -butyl) pyridine can replace dimethyl sulfoxide to control the crystallization without oxidizing tin. We show that tin perovskite films deposited from pyridine have a 1 order of magnitude lower defect density, which promotes charge mobility and photovoltaic performance.

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confidence: 99%

Pyridine Controlled Tin Perovskite Crystallization

et al. 2022

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“…The findings in this work show that the integration of 3-TMA as a solid additive to the precursor perovskite solution has the potential to bind its carbonyl groups (Lewis base) to Pb 2+ (Lewis acid). Its binding potential simplifies the free charge carrier mobility and extraction across the bulk and interface of the OIHP layer. ,, Consequently, the additive-incorporated p-i-n OIHPSC, which was processed in an ambient environment except for top contact, showed significant improvements in V oc , J sc , FF, and stability of the device. The results confirm that the incorporation of this additive is a viable strategy to reduce trap-assisted recombination and improve the overall performance of MAPbI 3 -based perovskite solar cells.…”

Section: Discussionmentioning

confidence: 99%

3-Thiophenemalonic Acid Additive Enhanced Performance in Perovskite Solar Cells

Abicho,

Hailegnaw,

Mayr

et al. 2024

ACS Omega

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The development of ambient-air-processable organic−inorganic halide perovskite solar cells (OIHPSCs) is a challenge necessary for the transfer of laboratory-scale technology to large-scale and low-cost manufacturing of such devices. Different approaches like additives, antisolvents, composition engineering, and different deposition techniques have been employed to improve the morphology of the perovskite films. Additives that can form Lewis acid−base adducts are known to minimize extrinsic impacts that trigger defects in ambient air. In this work, we used the 3-thiophenemalonic acid (3-TMA) additive, which possesses thiol and carboxyl functional groups, to convert PbI 2 , PbCl 2 , and CH 3 NH 3 I to CH 3 NH 3 PbI 3 completely. This strategy is effective in regulating the kinetics of crystallization and improving the crystallinity of the light-absorbing layer under high relative humidity (RH) conditions (30−50%). As a result, the 3-TMA additive increases the yield of the power conversion efficiency (PCE) from 14.9 to 16.5% and its stability under the maximum power point. Finally, we found that the results of this work are highly relevant and provide additional inputs to the ongoing research progress related to additive engineering as one of the efficient strategies to reduce parasitic recombination and enhance the stability of inverted OIHPSCs in ambient environment processing.

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“…[78][79][80] While TBP in spiro-OMeTAD HTL is also a strong surface passivator due to its Lewis base characteristics. 81,82 It was identified that the TBP in spiro-OMeTAD can provide a similar passivation effect to the TBP interlayer. 83 Therefore, when the passivation capability of the HTM is not strong, the PMMA interlayer would play a more significant role in defect passivation for the device with dopant-free HTM.…”

Section: Small Molecule Htms With Dpa/tpamentioning

confidence: 99%