Phenyl and thienyl functionalized imidazolium iodides for highly efficient quasi-solid-state dye-sensitized solar cells

Mei-rong, Zhang; Jin, Zhitong; Feng, Chuanqi; Wang, Min; Wang, Zhongsheng

doi:10.1039/c7ta04717g

Cited by 10 publications

(1 citation statement)

References 43 publications

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“…In recent years, ionic liquids have been widely used in dye-sensitized solar cells , and PSCs − The coexistence of electrostatic charge, aromatic group, and alkyl segment in the molecular structure of ionic liquids contributes to the formation of good affinity between inorganic materials and organic materials in solar cells, which not only provides convenient channels for carrier transport but also improves the interface properties . The ionic liquids reported in PSCs are usually alkyl- or alkenyl-substituted imidazolium with anions of non-iodides, such as tetrafluoroborate, chloride, and hexafluorophosphate. − These ionic liquids have weak interactions with the CsPbI 3– x Br x all-inorganic perovskite and cannot supply iodides to passivate iodide vacancies.…”

Section: Introductionmentioning

confidence: 99%

Black Phase of Inorganic Perovskite Stabilized with Carboxyimidazolium Iodide for Stable and Efficient Inverted Perovskite Solar Cells

Zhao

Wan

et al. 2022

ACS Appl. Mater. Interfaces

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As all-inorganic perovskite (CsPbI3–x Br x ) is prone to phase transition from the α phase (black phase) to the δ phase (yellow phase) in a humid environment or under heating, improving the phase stability of all-inorganic perovskite of the black phase is one of the urgent problems to solve. Herein, 1,2-dimethyl-3-acetylimidazolium iodide (DMAII) is spin-coated onto the surface of CsPbI3–x Br x perovskite for use in p–i–n perovskite solar cells (PSCs). We find that the DMAII coating has two effects on the CsPbI3–x Br x perovskite film: surface passivation and phase stabilization of perovskite. Traps in the CsPbI3–x Br x perovskite film can be reduced significantly by DMAII passivation, resulting in enhanced hole extraction and suppressed charge recombination. Consequently, the power conversion efficiency (PCE) is improved from 10.81 to 13.14%. Moreover, the DMAII coating can significantly inhibit the phase transition from the α phase to the δ phase in a humid environment or under heating, as characterized by the X-ray diffraction pattern, UV–vis absorption spectrum, and film color. After exposing the CsPbI3–x Br x perovskite films to a humid atmosphere (relative humidity = 40–60%) for 6 h, the PCE decreases dramatically to only 0.12% of the initial PCE for the PSC without the DMAII coating, while the PCE maintains 80% of the initial PCE for the PSC with the DMAII coating. In addition, when the PSC devices are heated at 120 °C for 4 h, the control PSC shows a 96% decrease in PCE, while the PCE decay is only 9% for the DMAII-coated PSC. These findings indicate that carboxyl-substituted imidazolium iodide is a kind of promising material to not only passivate traps but also stabilize the black phase of all-inorganic perovskite.

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Section: Introductionmentioning

confidence: 99%

Black Phase of Inorganic Perovskite Stabilized with Carboxyimidazolium Iodide for Stable and Efficient Inverted Perovskite Solar Cells

Zhao

Wan

et al. 2022

ACS Appl. Mater. Interfaces

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N-doped C-CoS2@CoS2/MoS2 nano polyhedrons with hierarchical yolk-shelled structures as bifunctional catalysts for enhanced photovoltaics and hydrogen evolution

Yang

Zhang

Niu

et al. 2021

Chemical Engineering Journal

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The influences of different bi-component supramolecular gel electrolytes on the photovoltaic performances of quasi-solid-state dye-sensitized solar cell

Zhang

Wang

Chen

et al. 2019

Materials Chemistry and Physics

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Phenyl and thienyl functionalized imidazolium iodides for highly efficient quasi-solid-state dye-sensitized solar cells

Abstract: The photovoltaic performance of quasi-solid-state DSSCs depends on the substituent and the substitution site of the imidazolium ring as well.

Cited by 10 publications

References 43 publications

Black Phase of Inorganic Perovskite Stabilized with Carboxyimidazolium Iodide for Stable and Efficient Inverted Perovskite Solar Cells

Black Phase of Inorganic Perovskite Stabilized with Carboxyimidazolium Iodide for Stable and Efficient Inverted Perovskite Solar Cells

N-doped C-CoS2@CoS2/MoS2 nano polyhedrons with hierarchical yolk-shelled structures as bifunctional catalysts for enhanced photovoltaics and hydrogen evolution

The influences of different bi-component supramolecular gel electrolytes on the photovoltaic performances of quasi-solid-state dye-sensitized solar cell

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