Surface-bulk-passivated perovskite films via 2-thiophenemethylammonium bromide and PbBr2 for air-processed perovskite solar cells with high-stability

Wen, Lingling; Deng, Yaxin; Zeng, Gangyi; Liu, Guangyao; Li, Xin

doi:10.1016/j.cej.2023.143446

Cited by 8 publications

(7 citation statements)

References 57 publications

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“…S10 (ESI†). 32,46 The defect density can be calculated by the equationwhere V TFL is the trap-filled voltage limit, e is the elementary charge, N t is the defect density, L is the thickness of the perovskite film, ε 0 is the vacuum permittivity, and ε is the relative dielectric constant. As presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In recent years, the fabrication process of PSCs in ambient air without a strictly controlled environment has gained great attention owing to the simplified manufacturing process and low cost. 31–37 Nevertheless, overcoming the low intrinsic stability of all-air-processed PSCs is essential. The Cs-containing mixed cation perovskite is considered as one of the most effective solutions to address the stability issue.…”

Section: Introductionmentioning

confidence: 99%

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Buried interface modification by multifunctional ionic liquids for triple-cation perovskite solar cells made in a fully ambient air

Zeng,

Liu,

Wang

et al. 2024

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Buried interface modification by multifunctional ionic liquids for triple-cation perovskite solar cells made in a fully ambient air

Zeng,

Liu,

Wang

et al. 2024

J. Mater. Chem. C

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“…41 It is reported that the small ionic radius of bromine ions is relatively conducive to the formation of cubic structures, which promotes the formation of perovskite structures to a certain extent. 44 Therefore, defects are expected to minimize and optimize the structure of the material. The PL peak strength of the target perovskite films increased significantly.…”

Section: Resultsmentioning

confidence: 99%

Slow-Release Effect Assisted Crystallization for Sequential Deposition Realizes Efficient Inverted Perovskite Solar Cells

You,

Ma,

et al. 2024

ACS Appl. Mater. Interfaces

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The two-step sequential deposition strategy has been widely recognized in promoting the research and application of perovskite solar cells, but the rapid reaction of organic salts with lead iodide inevitably affects the growth of perovskite crystals, accompanied by the generation of more defects. In this study, the regulation of crystal growth was achieved in a two-step deposition method by mixing 1-naphthylmethylammonium bromide (NMABr) with organic salts. The results show that the addition of NMABr effectively delays the aggregation and crystallization behavior of organic salts; thereby, the growth of the optimal crystal (001) orientation of perovskite is promoted. Based on this phenomenon of delaying the crystallization process of perovskite, the “slow-release effect assisted crystallization” is defined. Moreover, the incorporation of the Br element expands the band gap of perovskite and mitigates material defects as nonradiative recombination centers. Consequently, the power conversion efficiency (PCE) of the enhanced perovskite solar cells (PSCs) reaches 20.20%. It is noteworthy that the hydrophobic nature of the naphthalene moiety in NMABr can enhance the humidity resistance of PSCs, and the perovskite phase does not decompose for more than 3000 h (30–40% RH), enabling it to retain 90% of its initial efficiency even after exposure to a nitrogen environment for 1200 h.

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“…A detailed calculations can be found in the supporting information. Figure 4i simultaneously suppress defects at the GBs and the surface of the perovskite film [40] .…”

Section: These Findings Indicate the Formation Of Hydrogen Bonds Betw...mentioning

confidence: 96%

Efficiency enhancement to 24.62% in inverted perovskite solar cells through poly (ionic liquid) bulk modification

Chen,

Wang,

Yang

et al. 2024

Energy Materials and Devices

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Small-molecule ionic liquids (ILs) are frequently employed as efficient bulk phase modifiers for perovskite materials. However, their inherent characteristics, such as high volatility and ion migration properties, pose challenges in addressing the stability issues associated with perovskite solar cells (PSCs). In this study, we design a poly(IL) with multiple active sites, named poly[4-styrenesulfonyl(trifluoromethylsulfonyl)imide]pyridine (P[STFSI][PPyri]), as an efficient additive of perovskite materials. The S=O in the sulfonyl group chelates with uncoordinated Pb 2+ and forms hydrogen bonds with the organic cations in the perovskite, suppressing the volatilization of the organic cations. The N + in pyridine can fix halide ions through electrostatic interaction with I − and Br − ions to prevent halide ion migration. P[STFSI][PPyri] demonstrates the ability to passivate defects and suppress nonradiative recombination in PSCs. Additionally, it facilitates the fixation of organic and halide ions, thereby enhancing the device's stability and photoelectric performance. Consequently, the introduction of P[STFSI][PPyri] as a dopant in the devices resulted in an excellent efficiency of 24.62%, demonstrating outstanding long-term operational stability, with the encapsulated device maintaining 87.6% of its initial efficiency even after 1500 h of continuous maximum power point tracking. This strategy highlights the promising potential of poly(IL) as an effective additive for PSCs, providing a combination of high performance and stability.

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Surface-bulk-passivated perovskite films via 2-thiophenemethylammonium bromide and PbBr2 for air-processed perovskite solar cells with high-stability

Cited by 8 publications

References 57 publications

Buried interface modification by multifunctional ionic liquids for triple-cation perovskite solar cells made in a fully ambient air

Buried interface modification by multifunctional ionic liquids for triple-cation perovskite solar cells made in a fully ambient air

Slow-Release Effect Assisted Crystallization for Sequential Deposition Realizes Efficient Inverted Perovskite Solar Cells

Efficiency enhancement to 24.62% in inverted perovskite solar cells through poly (ionic liquid) bulk modification

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