Cross-linking polymerization boosts the performance of perovskite solar cells: from material design to performance regulation

Yin, Xing; Wang, Ziyu; Zhao, Yingjie; Zhang, Shasha; Zhang, Yiqiang; Song, Yanlin

doi:10.1039/d3ee01546g

Cited by 12 publications

(2 citation statements)

References 200 publications

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“…[ 45–49 ] Particularly, perovskite solar cells (PSCs) have revolutionized the solar cell sector with their swiftly improving power conversion efficiency (PCE), now on par with commercialized silicon‐based solar cells. [ 50–58 ] In particular, the stability of PSCs has seen notable advancements, particularly through encapsulation techniques and stability testing tailored for real‐life applications. Developments in defect‐tolerant materials and better ion migration control contribute to enhanced cell longevity [ 59–64 ] ; However, challenges persist, particularly in terms of operational stability under ambient conditions [ 65,66 ] and mechanical stability when designed as flexible devices.…”

Section: Introductionmentioning

confidence: 99%

Decoding Polymeric Additive‐Driven Self‐Healing Processes in Perovskite Solar Cells from Chemical and Physical Bonding Perspectives

Nam,

Choi,

Lee

et al. 2024

Advanced Energy Materials

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This review addresses the self‐healing effects in perovskite solar cells (PSCs), emphasizing the significance of chemical and physical bonding as core mechanisms. Polymeric additives play a vital role in inducing self‐healing phenomena along with the intrinsic properties of perovskite materials, both of which are discussed herein. As a relatively underexplored area, the self‐healing effect induced by polymeric additives in PSCs is reviewed from a chemical perspective. The chemical bonds involved in self‐healing include isocyanate, disulfide, and carboxylic acid groups. The physical bonds related to self‐healing effects are primarily hydrogen bonding and chelation. Self‐healing in flexible perovskite devices extends their lifespan and improves their mechanical robustness against environmental and mechanical stressors. This discussion delves into the initiation methods for self‐healing, the conditions required, and the recovery‐rate profiles. This review not only catalogs various approaches to self‐healing, but also considers the fundamental limitations and potential of this phenomenon in PSCs. In addition, insights and an outlook on self‐healing in perovskite‐based optoelectronics are provided, offering guidance for future research and applications.

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Section: Introductionmentioning

confidence: 99%

Decoding Polymeric Additive‐Driven Self‐Healing Processes in Perovskite Solar Cells from Chemical and Physical Bonding Perspectives

Nam,

Choi,

Lee

et al. 2024

Advanced Energy Materials

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show abstract

“…Moreover, the hysteresis was also suppressed in the target device, as seen in Figure S13. The statistical analysis from 50 individual devices in Figure S14 showed that the PCE, V oc , and FF of target devices were significantly improved with a slight reduction in J sc , which might be attributed to the relatively low conductivity of the residual polymerized HEMA within the film. − Figure S15 presents the cross-section SEM images of the control and target perovskite films; we attributed the incomplete coverage at the perovskite/SnO 2 interface to the rapid crystal growth in the pristine perovskite . In contrast, a uniform perovskite film that is closely connected to the underlying SnO 2 was formed for the HEMA-modified perovskites.…”

mentioning

confidence: 99%

Vertically Oriented Perovskites with Minimized Intrinsic Boundaries for Efficient Photovoltaics

Zhang,

Guo,

Wen

et al. 2024

J. Phys. Chem. Lett.

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Intrinsic boundaries formed by grain stacks of randomly oriented perovskite crystallites seriously restrict charge transport in the resultant photovoltaic devices, whereas direct passivation of these defects remains unexplored, and it is desirable to modulate perovskite growth with uniform orientation. Herein, we report a simple but effective method to regulate perovskite crystallization by employing a volatile and polymerizable monomer of hydroxyethyl methacrylate (HEMA), which can simultaneously interact with both FA + and Pb 2+ via hydrogen and coordination bonding, respectively, to seed perovskite crystallization with accelerated nucleation and retarded crystal growth. Upon thermal annealing, the gradual volatilization and partial self-condensation of the HEMA drive the perovskite growth perpendicularly to the substrate, leading to largely suppressed defect states, improved crystallinity, and a reduced Young's modulus of the perovskite film. As a result, champion efficiencies exceeding 24 and 22% with improved operational and mechanical stability of the optimized perovskite solar cells based on rigid and flexible substrates were finally achieved.

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Debridement Strategy by Pre‐Bending Passivation for Flexible All‐Inorganic Perovskite Solar Cells Beyond 70 000 Bending Cycles

Liu,

Xu,

Han

et al. 2024

Adv Funct Materials

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The mechanical durability and efficiency of all‐inorganic flexible perovskite solar cells (f‐PSCs) still require enhancement for practical applications. In this study, a creative debridement strategy to improve the mechanical durability and photovoltaic performance of all‐inorganic f‐PSCs by pre‐bending the flexible perovskite film and then depositing the passivation agent 2‐mercaptopyridine is proposed. The pre‐bending process induced the generation of microcracks in the perovskite film surface, and 2‐mercaptopyridine can more effectively penetrate the interior of the film through the microcracks, thereby further passivating deep surface defects. These microcracks and defects can be perfectly repaired by 2‐mercaptopyridine. Bidentate coordination sites of S and N in 2‐mercaptopyridine show stronger binding energy with surface defects. The debridement strategy effectively enhanced the crystallization of the film surface and markedly inhibited crack propagation during the film's bending process. The optimized device achieves a champion power conversion efficiency (PCE) of 14.74%. The pre‐bent and passivated all‐inorganic f‐PSC shows 104% of its initial PCE after 15 000 bending cycles at a curvature radius of 3 mm. Remarkably, even after undergoing 70 000 bending cycles at a curvature radius of 5 mm, pre‐bent, and passivated f‐PSC can retain over 93% of its initial PCE, exhibiting excellent mechanical durability.

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Cross-linking polymerization boosts the performance of perovskite solar cells: from material design to performance regulation

Abstract: Perovskite polycrystalline films with massive grain boundaries (GBs) lead to high defect densities as well as poor environmental stability. Polymers additives provide an effective insight to solve these problems. However,...

Cited by 12 publications

References 200 publications

Decoding Polymeric Additive‐Driven Self‐Healing Processes in Perovskite Solar Cells from Chemical and Physical Bonding Perspectives

Decoding Polymeric Additive‐Driven Self‐Healing Processes in Perovskite Solar Cells from Chemical and Physical Bonding Perspectives

Vertically Oriented Perovskites with Minimized Intrinsic Boundaries for Efficient Photovoltaics

Debridement Strategy by Pre‐Bending Passivation for Flexible All‐Inorganic Perovskite Solar Cells Beyond 70 000 Bending Cycles

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