Nucleation and growth of copper phthalocyanine aggregates deposited from solution on planar surfaces

Ghani, Fatemeh; Gojżewski, Hubert; Riegler, Hans

doi:10.1016/j.apsusc.2015.06.020

Cited by 16 publications

(17 citation statements)

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“…27,28 Then the solution becomes supersaturated, nucleation, growth and solid perovskite (or intermediate) film forms. This deposition process usually consists of two stages.…”

Section: Resultsmentioning

confidence: 99%

Morphology-controlled CH₃NH₃PbI₃films by hexane-assisted one-step solution deposition for hybrid perovskite mesoscopic solar cells with high reproductivity

et al. 2015

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Table of contents entry:Morphology-controlled and uniform perovskite films were realized by using n-hexane to promote the crystallization of CH 3 NH 3 PbI 3 , thus improving the thermal stability of CH 3 NH 3 PbI 3 and performance of the corresponding perovskite solar cells. AbstractThe morphology and crystal structure of perovskite films is critical for achieving high-performance perovskite solar cells, however in most cases, the conventional one-step solution deposition method hardly yield a homogeneous perovskite film over a large area, especially for CH 3 NH 3 PbI 3 . Here we propose a facile and environment-friendly hexane-assisted one-step solution approach for dense and uniform CH 3 NH 3 PbI 3 thin films. According to the phase diagram of immiscible liquids, n-hexane was chosen as the assistant solvent to speed-up the evaporation of the main solvent N,N-dimethylformamide (DMF) during solution deposition process, thus significantly promote the nucleation and crystallization process of CH 3 NH 3 PbI 3 perovskite. The as-prepared CH 3 NH 3 PbI 3 films demonstrated uniform and dense morphology, and enhanced light absorption in long-wavelength range. In particular, such n-hexane treatment could help eliminate the residue DMF and greatly improve the thermal stability of the obtained perovskite films. The full solution-processed CH 3 NH 3 PbI 3 solar cells using n-hexane treatment exhibited a maximum power conversion efficiency of 11.7% and average efficiencies of 11.3±0.4% under standard AM 1.5 conditions in comparison with 7.0±0.4% of the conventional cells. The recombination resistance of the cells increased nearly 5 times by using n-hexane. These results suggest that this hexane-assisted one-step solution approach is promising for controlling the crystallization process of CH 3 NH 3 PbI 3 to achieve high-performance perovskite solar cell.

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“…27,28 Then the solution becomes supersaturated, nucleation, growth and solid perovskite (or intermediate) film forms. This deposition process usually consists of two stages.…”

Section: Resultsmentioning

confidence: 99%

Morphology-controlled CH₃NH₃PbI₃films by hexane-assisted one-step solution deposition for hybrid perovskite mesoscopic solar cells with high reproductivity

et al. 2015

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“…[79][80][81] As the concentration of CuPc in the deposited solution increases, multiplayer formation is observed, however complete coverage for a single layer is never achieved due to the anisotropic nature of CuPc which effects surface diffusion and subsequent nucleation. [79][80][81] Solvent choice plays an important role in the formation of thin-lms by solution deposition. As discussed, the rate of solvent evaporation directly determines the crystallization rate, dictating the nal thin-lm morphology and microstructure.…”

Section: Effect Of Deposition Parametersmentioning

confidence: 99%

Metal phthalocyanines: thin-film formation, microstructure, and physical properties

2021

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“…While CuPc films obtained in a dry deposition process have been well studied in the literature [39][40][41][42], these obtained in a wet deposition process remain fragmented and incomplete [43][44][45][46][47]. This difficulty is dictated by the poor solubility of CuPc in commonly used solvents [44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Thin films of copper phthalocyanine deposited by solution processing methods

Gojżewski

Ghani

Szybowicz

2020

Materials Science-Poland

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In this work, we show and discuss the surface structure picture of copper phthalocyanine (CuPc) thin films deposited from trifluoroacetic acid (TFA) solvent onto silicon substrates at ambient conditions by four solution processing methods, namely drop-casting, dip-coating, spin-casting and spray-coating. The CuPc films were studied by AFM, as the main technique, and complemented by micro-Raman spectroscopy. Essentially, such thin films consist of CuPc molecular nanoribbons of a fixed ~1 nm thickness. CuPc molecules are arranged in an in-plane direction and formed in stacks under a defined tilt angle with respect to the substrate surface (monolayer) or underlying CuPc layer (multilayer). The film morphology takes various forms depending on the solution concentration, number of layers, and the deposition method. For instance, the morphology varies from very wide (~600 nm) but flat (~1 nm) ribbons for films prepared by dip-coating to crystallized rod-like features (multi-layered ribbons) when obtained by spray-coating. The factors studied in this paper should be taken into consideration in designing and controlling the criteria for rigorous CuPc film architecture.

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Nucleation and growth of copper phthalocyanine aggregates deposited from solution on planar surfaces

Cited by 16 publications

References 33 publications

Morphology-controlled CH₃NH₃PbI₃films by hexane-assisted one-step solution deposition for hybrid perovskite mesoscopic solar cells with high reproductivity

Morphology-controlled CH₃NH₃PbI₃films by hexane-assisted one-step solution deposition for hybrid perovskite mesoscopic solar cells with high reproductivity

Metal phthalocyanines: thin-film formation, microstructure, and physical properties

Thin films of copper phthalocyanine deposited by solution processing methods

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Nucleation and growth of copper phthalocyanine aggregates deposited from solution on planar surfaces

Cited by 16 publications

References 33 publications

Morphology-controlled CH3NH3PbI3films by hexane-assisted one-step solution deposition for hybrid perovskite mesoscopic solar cells with high reproductivity

Morphology-controlled CH3NH3PbI3films by hexane-assisted one-step solution deposition for hybrid perovskite mesoscopic solar cells with high reproductivity

Metal phthalocyanines: thin-film formation, microstructure, and physical properties

Thin films of copper phthalocyanine deposited by solution processing methods

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Product

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Morphology-controlled CH₃NH₃PbI₃films by hexane-assisted one-step solution deposition for hybrid perovskite mesoscopic solar cells with high reproductivity

Morphology-controlled CH₃NH₃PbI₃films by hexane-assisted one-step solution deposition for hybrid perovskite mesoscopic solar cells with high reproductivity