Stabilization of 3D/2D perovskite heterostructures via inhibition of ion diffusion by cross-linked polymers for solar cells with improved performance

Luo, Long; Zeng, Haipeng; Wang, Zaiwei; Li, Min; You, Shuai; Chen, Bin; Maxwell, Aidan; An, Qinyou; Cui, Lianmeng; Luo, Deying; Hu, Juntao; Li, Shangzhi; Cai, Xueqing; Li, Weixi; Li, Lin; Guo, Rui; Huang, Rong; Liang, Wenxi; Lu, Zheng‐Hong; Mai, Liqiang; Rong, Yaoguang; Sargent, Edward H.; Li, Xiong

doi:10.1038/s41560-023-01205-y

Cited by 80 publications

(71 citation statements)

References 61 publications

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“…[ 2 ] The photoactive α ‐FAPbI 3 phase can be easily converted into the photo‐non‐active δ ‐FAPbI 3 phase. [ 3 ] Therefore, a series of strategies, such as component engineering, [ 4 ] dimension engineering, [ 5 ] seed‐assisted crystallization engineering, [ 6 ] solvent engineering, [ 7 ] and additive engineering [ 8 ] has been employed to address the instability issues of the α ‐FAPbI 3 phase. Methylamine hydrochloride (MACl)‐assisted crystallization is a typical method used to prepare high‐quality FAPbI 3 perovskite films.…”

Section: Introductionmentioning

confidence: 99%

Lattice Strain Regulation Enables High‐Performance Formamidinium Perovskite Photovoltaics

Wang,

Li,

et al. 2023

Advanced Materials

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Formamidinium lead iodide (FAPbI3) perovskite possesses an ideal optical bandgap and is a potential material for fabricating the most efficient single‐junction perovskite solar cells (PSCs). Nevertheless, large formamidinium (FA) cations result in residual lattice strain, which reduces the power conversion efficiency (PCE) and operational stability of PSCs. Herein, the modulation of lattice strain in FAPbI3 crystals via a π‐conjugated organic amine, i.e., 4‐pyrene oxy butylamine (PYBA), is proposed. PYBA pairs at the grain boundary serve as a template for the crystallization of FAPbI3 perovskite, thereby inducing a highly oriented crystal and a pure α‐phase film. The PYBA pairs with strong π–π interactions provide a solid fulcrum for external compression strain, thus compensating for the inherent tension strain of FAPbI3 crystals. The strain release elevates the valence band of the perovskite crystals, thereby decreasing the bandgap and trap density. Consequently, the PYBA‐regulated FAPbI3 PSC achieves an excellent PCE of 24.76%. Moreover, the resulting device exhibits improves operational stability and maintains over 80% of its initial PCE after 1500 h under maximum power point tracking conditions.

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Section: Introductionmentioning

confidence: 99%

Lattice Strain Regulation Enables High‐Performance Formamidinium Perovskite Photovoltaics

Wang,

Li,

et al. 2023

Advanced Materials

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“…Although 2D perovskite capping layers are known to increase the stability to moisture, they might compromise the long-term operational stability due to the ionic diffusion between these two layers, triggered and accelerated by constantly stressing the samples with light exposure and the applied electrical field. According to Luo et al , 37 after long time exposure to these stressing factors, the 2D perovskite layer can totally merge with the 3D perovskite layer, creating a disorganized 2D/3D perovskite heterostructure with high defect density, which is responsible for the efficiency loss.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of low-cost and flexible perovskite solar cells by slot-die coating for indoor applications

Teixeira¹,

Pineda²,

Andrade³

et al. 2023

Mater. Adv.

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“…For the latest work, Sargent et al further demonstrated high-temperature operation of PSCs by engineering the ligand reactivity. [129] Previously, it has been reported that the regular 2D/3D heterostructures may degrade at high temperatures due to ion diffusion or ligand intercalation [121,229,230] ((Figure 12e)). By engineering the reactivity of the ligand, it was found that the smallest aromatic ligand, anilinium (An), had the lowest ligand reactivity with 3D perovskites, and a fluorinated derivative of this ligand (345FAn) created a robust interface structure (Figure 12f,g).…”

Section: Construction Of 3d/2d Perovskite Heterostructuresmentioning

confidence: 99%

Post‐Treatment of Metal Halide Perovskites: From Morphology Control, Defect Passivation to Band Alignment and Construction of Heterostructures

Hu,

Zhu,

Zhou

et al. 2023

Advanced Energy Materials

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Metal halide perovskite solar cells (PSCs) have witnessed a swift increase in power conversion efficiency in the past decade, emerging as one of the most promising next‐generation photovoltaic technologies for commercialization and low‐carbon energy generation. Through significant efforts in optimizing the processing techniques, high‐quality perovskite thin films can now be prepared with polycrystalline morphologies consisting of monolayer grains. Nevertheless, defects and microstructural disorders still form at the surface/heterointerface and in the bulk of the films. Post‐treatment of the as‐crystallized films has been intensively investigated for passivating these defects, being proved effective for improving the device performance. In this review, the versatile strategies for post‐treating the surface of perovskite thin films toward morphology control, defect passivation, and band alignment are discussed. The tailored surface properties are correlated to charge dynamics at interfaces and photovoltaic performance of PSCs. Since the perovskite heterostructures prepared by simple post‐treatments may suffer from degradation at high temperatures, the recent advances in preparing phase‐pure and stable perovskite heterostructures are also discussed. Finally, a perspective elaborating future opportunities for further enhancing the efficiency and stability of PSCs is provided.

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Stabilization of 3D/2D perovskite heterostructures via inhibition of ion diffusion by cross-linked polymers for solar cells with improved performance

Cited by 80 publications

References 61 publications

Lattice Strain Regulation Enables High‐Performance Formamidinium Perovskite Photovoltaics

Lattice Strain Regulation Enables High‐Performance Formamidinium Perovskite Photovoltaics

Fabrication of low-cost and flexible perovskite solar cells by slot-die coating for indoor applications

Post‐Treatment of Metal Halide Perovskites: From Morphology Control, Defect Passivation to Band Alignment and Construction of Heterostructures

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