High performance ambient-air-stable FAPbI<sub>3</sub> perovskite solar cells with molecule-passivated Ruddlesden–Popper/3D heterostructured film

Niu, Tianqi; Lu, Jing; Tang, Maochun; Barrit, Dounya; Smilgies, Detlef‐M.; Yang, Zhou; Li, Jianbo; Fan, Yuanyuan; Luo, Tao; McCulloch, Iain; Amassian, Aram; Liu, Shengzhong; Zhao, Kui

doi:10.1039/c8ee02542h

Cited by 218 publications

(184 citation statements)

References 63 publications

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“…[31,[74][75][76][77] The estimated trap densities and charge carrier mobilities of the 3D and 3D-2D perovskite thin films are shown in Figure S17 Figure S17b,d, Supporting Information). [31,[74][75][76][77] The estimated trap densities and charge carrier mobilities of the 3D and 3D-2D perovskite thin films are shown in Figure S17 Figure S17b,d, Supporting Information).…”

Section: Transient Measurements On the Fpeai Modified Devicesmentioning

confidence: 99%

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High‐Performance Perovskite Solar Cells with Enhanced Environmental Stability Based on a (p‐FC₆H₄C₂H₄NH₃)₂[PbI₄] Capping Layer

Zhou

Liang

et al. 2019

Advanced Energy Materials

240

130

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lengths, low exciton binding energy, and ease of solution processability, which promise the perovskite-based photovoltaic devices both high efficiency and low manufacture cost. The intense effort to improve power conversion efficiencies (PCEs) has resulted in PCEs of perovskite solar cells (PSCs) increasing from 3.8% in 2009 [5] to over 23% in 9 years. [6,7] Changes in material composition (e.g., using mixed cations and halides together into a 3D lead−halide perovskites, such as [FA/MA]Pb[I/Br] 3 , [8] [FA/Cs]Pb[I/Br] 3 , [9,10] or [Cs/FA/MA]Pb[I/Br] 3[11] ) have played essential role to improve the performances and structural stability. However, the intrinsic instability of the 3D lead−halide perovskites with regard to moisture, heat, light, and oxygen remains to be entirely circumvented. [12,13] Two main measures have been taken to increase the stability of PSCs: providing sufficient protection to the perovskite material [14] and increasing the intrinsic stability of the perovskite material. [15] More importantly, techniques that can improve device stability without sacrificing the efficiency are critical for the future of PSCs. In this regard, strategies called multidimensional perovskite (MDP) using Ruddlesden-Popper type perovskite (Class I) or low dimensional polymorphs passivated 3D perovskites (Class II) were brought into being increasing the intrinsic stability of the perovskite material. [16] Ruddlesden-Popper phase layered perovskites ((RNH 3 ) 2 (MA) n−1 Pb n X 3n+1 , n = 1, 2, 3, 4, 5, …) [17][18][19][20][21] which was introduced by Smith et al. showed albeit low PCE the superior ambient stability, [18] where RNH 3 are large aliphatic or aromatic ammonium cations represented by n-butylammonium (BA) and 2-phenylethylammonium (PEA). (BA) 2 (MA) 2 Pb 3 I 10 as a light absorber retained its performance after exposure to a highhumidity environment for 60 d. [20] So far the highest reported PCE of Ruddlesden-Popper type perovskite-based solar cell is 15.42%. [22] Very recently, Zhang et al. utilized synchrotron source based in situ measurement to disclose the phase transition kinetics during the crystallization of Ruddlesden-Popper type perovskite. This study provided insight into the relationship between phase purity, quantum well orientation, and photovoltaic performance. [23] On the other hand, the approaches that involve low dimensional polymorphs passivated 3D perovskites, or 3D-2D perovskite stacked structures attracted extensive interest in recent years. This approach features not only the Supported by the density functional theory (DFT) calculations, for the first time, a fluorinated aromatic cation, 2-(4-fluorophenyl)ethyl ammonium iodide (FPEAI), is introduced to grow in situ a low dimensional perovskite layer atop 3D perovskite film with excess PbI 2 . The resulted (p-FC 6 H 4 C 2 H 4 NH 3 ) 2 [PbI 4 ] perovskite functions as a protective capping layer to protect the 3D perovskite from moisture. In the meantime, the thin layer facilitates charge transfer at the interfaces, thereby reducing the...

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Section: Transient Measurements On the Fpeai Modified Devicesmentioning

confidence: 99%

“…[26][27][28][29] Very recently, Lee et al incorporation of PEA 2 PbI 4 into the precursor solution of FAPbI 3 . [31] To further enhance the hydrophobicity of the cations, it is reasonable to introduce fluorinated moieties. A stabilized PCE of 20.64% (certified stabilized PCE of 19.77%) was achieved.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance Perovskite Solar Cells with Enhanced Environmental Stability Based on a (p‐FC₆H₄C₂H₄NH₃)₂[PbI₄] Capping Layer

Zhou

Liang

et al. 2019

Advanced Energy Materials

240

130

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“…In recent years, in situ time‐resolved grazing incidence wide‐angle X‐ray scattering (GIWAXS) has emerged as an effective method to monitor solid‐state thin film formation and microstructure evolution during solution casting of ink‐based semiconductors . More recently, it has also been used successfully to investigate crystallization behavior for 3D and reduced dimensional perovskites solution‐cast using spin‐coating and blade‐coating . Chen and coworkers found the coexistence of dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) in the intermediate phase of MAPbI 3 perovskite and accordingly fine‐tuned the quality of films by adjusting DMSO concentration to further improve solar cell performance .…”

Section: Introductionmentioning

confidence: 99%

Bismuth‐Based Perovskite‐Inspired Solar Cells: In Situ Diagnostics Reveal Similarities and Differences in the Film Formation of Bismuth‐ and Lead‐Based Films

et al. 2019

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Organic–inorganic lead‐based halide perovskite compounds currently yield thin film solar cells with a power conversion efficiency (PCE) of >23%. However, replacing the lead with less‐toxic elements while maintaining a high PCE remains a challenge. For this reason, there has been significant effort to develop Pb‐free compounds, including methylammonium bismuth iodide (MA3Bi2I9), but such systems severely underperform when compared with the prototypical Pb‐based methylammonium lead iodide (MAPbI3). For the latter, it is known that lead complexes with polar solvents, such as dimethyl sulfoxide (DMSO) and dimethylformamide (DMF), to form iodoplumbates which can co‐crystallize into solvated phases. Herein, the solidification and growth behaviors of Bi‐ and Pb‐based films is investigated using multi‐probe in situ characterization methods. It is shown that the Bi‐based compound crystallizes directly and rapidly into a textured polycrystalline microstructure from a precursor solution without evolving through intermediate crystalline solvated phases, in contrast to MAPbI3. This solidification process produces isolated crystals and challenges the growth of continuous and crystalline films required for solar cells. It is revealed that solvent engineering with antisolvent dripping is crucial to enable the formation of continuous polycrystalline films of MA3Bi2I9 and functional solar cells thereof.

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“…However, it is still prone to degradation under the environment of moisture and is likely to change into a non‐perovskite structure. [ 76,77,83 ] The B site are often occupied by divalent metal ions, such as Pb, Sn, and Ge, for their attractive optoelectronic properties. In which, Pb is the most widely used B site cation.…”

Section: Stability Of Perovskite Materialsmentioning

confidence: 99%

Stability of Perovskite Light Sources: Status and Challenges

Chen

Cui

et al. 2020

Advanced Optical Materials

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Stable perovskites light sources with long‐term stability are of great significance for future commercial applications. In this review, recent advances of the degradation models for perovskites and strategies for enhancing the stability of the corresponding light sources are summarized. Improving the stability and quality of perovskite materials is a common way for developing stable perovskite light sources. For strengthening the stability of perovskite light‐emitting diodes, approaches such as surface and interface engineering and employing more stable hole injection layers are effective. To enhance the stability of perovskite amplified spontaneous emission and lasers, methods such as protecting perovskites by materials with high intrinsic thermal conductivity and high stability, better thermal managements, and reducing the threshold carrier densities are useful. This work will be helpful for further prompting the performances, especially the stability of perovskite light sources in this fantastic field.

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High performance ambient-air-stable FAPbI₃ perovskite solar cells with molecule-passivated Ruddlesden–Popper/3D heterostructured film

Abstract: We report a Ruddlesden–Popper/3D heterostructure combined with molecule passivation within α-phase FAPbI3 films for high-performance and ambient-air-stable solar cells.

Cited by 218 publications

References 63 publications

High‐Performance Perovskite Solar Cells with Enhanced Environmental Stability Based on a (p‐FC₆H₄C₂H₄NH₃)₂[PbI₄] Capping Layer

High‐Performance Perovskite Solar Cells with Enhanced Environmental Stability Based on a (p‐FC₆H₄C₂H₄NH₃)₂[PbI₄] Capping Layer

Bismuth‐Based Perovskite‐Inspired Solar Cells: In Situ Diagnostics Reveal Similarities and Differences in the Film Formation of Bismuth‐ and Lead‐Based Films

Stability of Perovskite Light Sources: Status and Challenges

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High performance ambient-air-stable FAPbI3 perovskite solar cells with molecule-passivated Ruddlesden–Popper/3D heterostructured film

Abstract: We report a Ruddlesden–Popper/3D heterostructure combined with molecule passivation within α-phase FAPbI3 films for high-performance and ambient-air-stable solar cells.

Cited by 218 publications

References 63 publications

High‐Performance Perovskite Solar Cells with Enhanced Environmental Stability Based on a (p‐FC6H4C2H4NH3)2[PbI4] Capping Layer

High‐Performance Perovskite Solar Cells with Enhanced Environmental Stability Based on a (p‐FC6H4C2H4NH3)2[PbI4] Capping Layer

Bismuth‐Based Perovskite‐Inspired Solar Cells: In Situ Diagnostics Reveal Similarities and Differences in the Film Formation of Bismuth‐ and Lead‐Based Films

Stability of Perovskite Light Sources: Status and Challenges

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High performance ambient-air-stable FAPbI₃ perovskite solar cells with molecule-passivated Ruddlesden–Popper/3D heterostructured film

High‐Performance Perovskite Solar Cells with Enhanced Environmental Stability Based on a (p‐FC₆H₄C₂H₄NH₃)₂[PbI₄] Capping Layer

High‐Performance Perovskite Solar Cells with Enhanced Environmental Stability Based on a (p‐FC₆H₄C₂H₄NH₃)₂[PbI₄] Capping Layer