Bioinspired molecules design for bilateral synergistic passivation in buried interfaces of planar perovskite solar cells

Wang, Bin; Ma, Junjie; Li, Zehua; Chen, Gangshu; Gu, Qiang; Chen, Shuyao; Zhang, Yiqiang; Song, Yanlin; Chen, Jingbo; Pi, Xiaodong; Yu, Xuegong; Yang, Deren

doi:10.1007/s12274-021-3600-z

Cited by 61 publications

(64 citation statements)

References 49 publications

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“…In order to overcome the above problems, researchers have treated the surface of SnO 2 films with organic functional materials, inorganic salts or nanoparticles, and low dimensional perovskites to suppress the surface defects, tune the energy alignment, optimize the interface contact and improve wettability. [ 22–27 ] Among these materials, ammonium salts are desirable to regulate the electrical band structure of SnO 2 and reduce the defect density at the SnO 2 /perovskite interface to further improve the device performance.…”

Section: Introductionmentioning

confidence: 99%

Record‐Efficiency Flexible Perovskite Solar Cells Enabled by Multifunctional Organic Ions Interface Passivation

et al. 2022

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Flexible perovskite solar cells (f‐PSCs) have attracted great attention because of their unique advantages in lightweight and portable electronics applications. However, their efficiencies are far inferior to those of their rigid counterparts. Herein, a novel histamine diiodate (HADI) is designed based on theoretical study to modify the SnO2/perovskite interface. Systematic experimental results reveal that the HADI serves effectively as a multifunctional agent mainly in three aspects: 1) surface modification to realign the SnO2 conduction band upward to improve interfacial charge extraction; 2) passivating the buried perovskite surface, and 3) bridging between the SnO2 and perovskite layers for effective charge transfer. Consequently, the rigid MA‐free PSCs based on the HADI‐SnO2 electron transport layer (ETL) display not only a high champion power conversion efficiency (PCE) of 24.79% and open‐circuit voltage (VOC) of 1.20 V but also outstanding stability as demonstrated by the PSCs preserving 91% of their initial efficiencies after being exposed to ambient atmosphere for 1200 h without any encapsulation. Furthermore, the solution‐processed HADI‐SnO2 ETL formed at low temperature (100 °C) is utilized in f‐PSCs that achieve a PCE as high as 22.44%, the highest reported PCE for f‐PSCs to date.

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Section: Introductionmentioning

confidence: 99%

Record‐Efficiency Flexible Perovskite Solar Cells Enabled by Multifunctional Organic Ions Interface Passivation

et al. 2022

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Section: Atom Substitution On the Benzene Ringmentioning

confidence: 99%

“…0.8 21.5 15 % RH, dark, > 85 % after 1320 h 2022 [93] D-4-tert-butylphenylalanine no in precursor (7.5 [87] protonated phenylethylammonium yes In precursor (3.34 mol %, 150 °C annealing for 30 min) FAPbI 3 20.64 ca. 30 % RH, dark, 98 % after 1392 h 2018 [109] 3-phenyl- 2019 [92] 4-tert-butyl-benzylammo- after 500 h 2020 [104] 4-vinylbenzylammonium yes post-treatment (4 mg mL after 1100 h 2020 [95] 1-naphthylmethylamine yes post-treatment (8 mg mL 21.04 ca.…”

Section: Multiple Benzene Ringsmentioning

confidence: 99%

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From Structural Design to Functional Construction: Amine Molecules in High‐Performance Formamidinium‐Based Perovskite Solar Cells

Tang

et al. 2022

Angewandte Chemie

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Formamidinium (FA) based perovskites are considered as one of the most promising light‐absorbing perovskite materials owing to their narrower band gap and better thermal stability compared to conventional methylammonium‐based perovskites. Constant improvement by using various additives stimulates the potential application of these perovskites. Amine molecules with different structures have been widely used as typical additives in FA‐based perovskite solar cells, and decent performances have been achieved. Thus, a systematic review focusing on structural regulation and functional construction of amines in FA‐based perovskites is of significance. Herein, we analyze the construction mechanism of different structural amines on the functional perovskite crystals. The influence of amine molecules on specific perovskite properties including defect conditions, charge transfer, and moisture resistance are evaluated. Finally, we summarize the design rules of amine molecules for the application in high‐performance FA‐based perovskites and propose directions for the future development of additive molecules.

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“… 42 Wang et al achieved a 21.46% efficiency, maximizing the passivation effect at the SnO 2 /perovskite interface, which can be predicted by the simultaneous presence of C–N and C=O groups in 3,4-dihydroxyphenylalanine (DOPA). 43 In the study by Dai et al , methyl ammonium chloride (MACl)-treated film effectively passivated the perovskite interface and hole transport across the film, thus reducing interface recombination. The V OC value, which was 1.06 V for the standard cell, increased to 1.09 V when treated with MACl.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Optimization of Charge Transport Properties in a Triple-Cation Perovskite Layer and Triple-Cation Perovskite/Spiro-OMeTAD Interface by Dual Passivation

et al. 2022

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Molecular engineering of additives is a highly effective method to increase the efficiency of perovskite solar cells by reducing trap states and charge carrier barriers in bulk and on the thin film surface. In particular, the elimination of undercoordinated lead species that act as the nonradiative charge recombination center or contain defects that may limit interfacial charge transfer is critical for producing a highly efficient triple-cation perovskite solar cell. Here, 2-iodoacetamide (2I-Ac), 2-bromoacetamide (2Br-Ac), and 2-chloroacetamide (2Cl-Ac) molecules, which can be coordinated with lead, have been used by adding them into a chlorobenzene antisolvent to eliminate the defects encountered in the triple-cation perovskite thin film. The passivation process has been carried out with the coordination between the oxygen anion (−) and the lead (+2) cation on the enolate molecule, which is in the resonance structure of the molecules. The Spiro-OMeTAD/triple-cation perovskite interface has been improved by surface passivation by releasing HX (X = I, Br) as a byproduct because of the separation of alpha hydrogen on the molecule. As a result, a solar cell with a negligible hysteresis operating at 19.5% efficiency has been produced by using the 2Br-Ac molecule, compared to the 17.6% efficiency of the reference cell.

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Bioinspired molecules design for bilateral synergistic passivation in buried interfaces of planar perovskite solar cells

Cited by 61 publications

References 49 publications

Record‐Efficiency Flexible Perovskite Solar Cells Enabled by Multifunctional Organic Ions Interface Passivation

Record‐Efficiency Flexible Perovskite Solar Cells Enabled by Multifunctional Organic Ions Interface Passivation

From Structural Design to Functional Construction: Amine Molecules in High‐Performance Formamidinium‐Based Perovskite Solar Cells

Simultaneous Optimization of Charge Transport Properties in a Triple-Cation Perovskite Layer and Triple-Cation Perovskite/Spiro-OMeTAD Interface by Dual Passivation

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