Mixed solvents for the optimization of morphology in solution-processed, inverted-type perovskite/fullerene hybrid solar cells

Kim, Hak Beom; Choi, Hyosung; Jeong, Jaeki; Kim, Seongbeom; Walker, Bright; Song, Seyeong; Kim, Jin Young

doi:10.1039/c4nr00130c

Cited by 286 publications

(191 citation statements)

References 27 publications

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“…In the present study, n = 2 was used for the CH 3 NH 3 PbI 3 because CH 3 NH 3 PbI 3 is a direct transition semiconductor [38]. As shown in Figure 7(b), the E g of the CH 3 NH 3 PbI 3 in the two devices were 1.59 eV, comparable with reported E g of CH 3 NH 3 PbI 3 prepared with a mixed solvent consisting of γ-butyrolactone and DMF [33]. However, there was no peak Figure 2 were used for the energy levels.…”

Section: Resultssupporting

confidence: 71%

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Fabrication of Perovskite-Type Photovoltaic Devices with Polysilane Hole Transport Layers

Shirahata¹,

Oku²,

Fukunishi³

et al. 2017

MSA

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Perovskite-type photovoltaic devices with polysilane hole transport layers were fabricated by a spin-coating method. In the present work, poly(methyl phenylsilane) (PMPS) and decaphenylcyclopentasilane (DPPS) were used as the hole transport layers. First, structural and optical properties of the PMPS and DPPS films were investigated, and the as-prepared PMPS and DPPS films were amorphous. Optical absorption spectra of the amorphous PMPS and DPPS showed some marked features due to the nature of polysilanes. Then, microstructures, optical and photovoltaic properties of the perovskite-type photovoltaic devices with polysilane hole transport layers were investigated. Current density-voltage characteristics and incident photon to current conversion efficiency of the photovoltaic devices with the polysilane layers showed different photovoltaic performance each other, attributed to molecular structures of the polysilanes and Si content in the present hole transport layers.

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Section: Resultssupporting

confidence: 71%

“…Poly(ethylene glycol) (Nacalai Tesque, averaged molecular number: 20,000, 10 mg), acetylacetone (Wako Pure Chemical Industries, 10 μL) and a surfactant (Sigma-Aldrich, Triton X-100, 5 μL) were added in the TiO 2 paste. The paste was stirred for 30 [33]. The molar ratio of the solutes was 1:1.…”

Section: Methodsmentioning

confidence: 99%

Fabrication of Perovskite-Type Photovoltaic Devices with Polysilane Hole Transport Layers

Shirahata¹,

Oku²,

Fukunishi³

et al. 2017

MSA

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“…The thickness of MAPbI 3 Figure 3a shows the XRD patterns of A, B, C, D and E regions of the large-area perovskite MAPbI 3 thin film. It was found that the A, B, C, D and E regions of large-area perovskite MAPbI 3 thin films reveal strong characteristic diffraction peaks of (110), (220) and (330) planes of MAPbI 3 , usually assigned to the tetragonal crystal structure of halide perovskite [22,23]. Also, the MAPbI 3 films in all regions did not have any impurity peak, in which the characteristic peak intensity was high, the crystallinity was high, and the preferred orientation of the film was obvious.…”

Section: Characterizationmentioning

confidence: 99%

Highly Uniform Large-Area (100 cm2) Perovskite CH3NH3PbI3 Thin-Films Prepared by Single-Source Thermal Evaporation

et al. 2018

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Abstract:In this work, we report the reproducible preparation method of highly uniform large-area perovskite CH 3 NH 3 PbI 3 thin films by scalable single-source thermal evaporation with the area of 100 cm 2 . The microstructural and optical properties of large-area CH 3 NH 3 PbI 3 thin films were investigated. The dense, uniform, smooth, high crystallinity of large-area perovskite thin film was obtained. The element ratio of Pb/I was close to the ideal stoichiometric ratio of CH 3 NH 3 PbI 3 thin film. These films show a favorable bandgap of 1.58 eV, long and balanced carrier-diffusion lengths. The CH 3 NH 3 PbI 3 thin film perovskite solar cell shows a stable efficiency of 7.73% with almost no hysteresis, indicating a single-source thermal evaporation that is suitable for a large area perovskite solar cell.

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“…Various strategies, such as thermal annealing, [13,14] additive inclusion, [15][16][17][18] modification of precursor concentrations and carrier solvents [19,20] and high-temperature-casting [21] have been investigated so far to control perovskite structure, grain size, degree of crystallinity and stability to moisture -however with varying success. [21,22] Here, we introduce the use of commercially available, low molecular-weight organic gelators (LMOGs) LMGOs are commonly used additives in the commodity plastics area because they promotealready at minute quantities -gelation of polymer solutions or melts upon cooling while they have no effect on these systems at elevated temperatures.…”

Section: Introductionmentioning

confidence: 99%

Organic Gelators as Growth Control Agents for Stable and Reproducible Hybrid Perovskite‐Based Solar Cells

Masi

Rizzo

Munir

et al. 2017

Advanced Energy Materials

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Article type: Full paperOrganic gelators as growth control agents for stable and reproducible hybrid perovskite-based solar cells Sofia Masi, [a] Aurora Rizzo, [a] Rahim Munir, [b] Andrea Listorti, [a,c] Antonella Giuri, [d] Carola Esposito Corcione, [d] Neil D. Treat, [e] Giuseppe Gigli, [a,c] Aram Amassian, [b] * Natalie Stingelin, [e,f] * and Silvia Colella* [a,c] Low molecular-weight organic gelators are widely used to influence the solidification of polymers, with applications ranging from packaging items, food containers to organic electronic devices, including organic photovoltaics. Here, this concept is extended to hybrid halide perovskite-based materials. In-situ time-resolved grazing incidence wide angle x-ray scattering (GIWAXS) measurements performed during spin-coating reveal that organic gelators beneficially influence the nucleation and growth of the perovskite precursor phase. This can be exploited for the fabrication of planar n-i-p heterojunction devices with MAPbI3 (MA = CH3NH3 + ) that display a performance that not only is enhanced by ∼25% compared to solar cells where the active layer was produced without the use of a gelator but that also feature a higher stability to moisture and a reduced hysteresis. Most importantly, the presented approach is straight-forward and simple, and it provides a general method to render the film-formation of hybrid perovskites more reliable and robust, analogous to the control that is afforded by these additives in the processing of commodity 'plastics'.

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Mixed solvents for the optimization of morphology in solution-processed, inverted-type perovskite/fullerene hybrid solar cells

Cited by 286 publications

References 27 publications

Fabrication of Perovskite-Type Photovoltaic Devices with Polysilane Hole Transport Layers

Fabrication of Perovskite-Type Photovoltaic Devices with Polysilane Hole Transport Layers

Highly Uniform Large-Area (100 cm2) Perovskite CH3NH3PbI3 Thin-Films Prepared by Single-Source Thermal Evaporation

Organic Gelators as Growth Control Agents for Stable and Reproducible Hybrid Perovskite‐Based Solar Cells

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