Perovskite Films Regulation via Hydrogen‐Bonded Polymer Network for Efficient and Stable Perovskite Solar Cells

Xu, Yumeng; Guo, Xing; Lin, Zhenhua; Su, Jie; Zhang, Jincheng; Hao, Yue; Yang, Ke‐Ke; Chang, Jingjing

doi:10.1002/ange.202306229

“…The stability of perovskite films is a key factor in evaluating device stability [41,42] . Perovskite films were aged for 300 h at 85°C and 60% relative humidity (RH) in ambient air to verify the stabilizing effect of P[STFSI][PPyri] on the perovskite film.…”

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

confidence: 99%

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

4

0

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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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Ligand Assisted Hydrogen Bonding: A Game‐Changer in Lead Passivation and Stability in Perovskite Solar Cells

Ahmed,

Rehman,

Chen

et al. 2024

Angewandte Chemie

0

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Lead halide perovskite solar cells (PSCs) have demonstrated power conversion efficiencies comparable to silicon‐based solar cells, yet their instability under environmental stressors, such as humidity, heat, and light, remains a significant barrier to commercialization. A primary cause of this instability is the uncoordinated lead ions (Pb2+), which accelerates the degradation of PSCs and pose environmental concerns due to potential lead leakage. Recently, the introduction of ligands into PSCs has shown promise in mitigating lead toxicity through effective passivation, primarily by forming hydrogen bonds (H‐bonds) between functional groups of the ligands and the perovskite structure. In this minireview, we explore the critical role of H‐bonds in stabilizing PSCs by enhancing the structural integrity of the perovskite layer and reducing lead leakage. Furthermore, we discuss the contribution of these ligands in defect passivation, hydrophobicity, self‐encapsulation, cross‐linking, and self‐healing mechanisms. These insights will highlight the multi‐functional capabilities of ligands in improving the long‐term stability and durability of PSCs, offering pathways to address current challenges in their commercialization.

show abstract

Ligand Assisted Hydrogen Bonding: A Game‐Changer in Lead Passivation and Stability in Perovskite Solar Cells

Ahmed,

Rehman,

Chen

et al. 2024

Angew Chem Int Ed

0

View full text Add to dashboard Cite

Lead halide perovskite solar cells (PSCs) have demonstrated power conversion efficiencies comparable to silicon‐based solar cells, yet their instability under environmental stressors, such as humidity, heat, and light, remains a significant barrier to commercialization. A primary cause of this instability is the uncoordinated lead ions (Pb2+), which accelerates the degradation of PSCs and pose environmental concerns due to potential lead leakage. Recently, the introduction of ligands into PSCs has shown promise in mitigating lead toxicity through effective passivation, primarily by forming hydrogen bonds (H‐bonds) between functional groups of the ligands and the perovskite structure. In this minireview, we explore the critical role of H‐bonds in stabilizing PSCs by enhancing the structural integrity of the perovskite layer and reducing lead leakage. Furthermore, we discuss the contribution of these ligands in defect passivation, hydrophobicity, self‐encapsulation, cross‐linking, and self‐healing mechanisms. These insights will highlight the multi‐functional capabilities of ligands in improving the long‐term stability and durability of PSCs, offering pathways to address current challenges in their commercialization.

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Perovskite Films Regulation via Hydrogen‐Bonded Polymer Network for Efficient and Stable Perovskite Solar Cells

Cited by 5 publications

References 57 publications

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

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

Ligand Assisted Hydrogen Bonding: A Game‐Changer in Lead Passivation and Stability in Perovskite Solar Cells

Ligand Assisted Hydrogen Bonding: A Game‐Changer in Lead Passivation and Stability in Perovskite Solar Cells

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