Improved Power Conversion Efficiency of Organic Photovoltaic Cell Fabricated by Electrospray Deposition Method by Mixing Different Solvents

Fukuda, Tsuguo; Takagi, Kenji; Asano, Tanemasa; Honda, Zentaro; Kamata, Norihiko; Shirai, Hajime; Ju, Jungmyoung; Yamagata, Yutaka; Tajima, Yusuke

doi:10.1143/jjap.51.02bk12

Cited by 24 publications

(27 citation statements)

References 67 publications

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“…In addition, Table 2 phenomena is caused by the high electric field between the substrate and the tip of glass capillary, and the charged droplet are efficiently pulled out from the glass capillary by the higher voltage. As a result, the supply speed of P3HT:PCBM solution increased with increasing applied voltage [14], and the slow evaporation speed of o-dichlorobenzene became slower with increasing applied voltage. This indicates that the slow evaporation speed of o-dichlorobenzene caused the ordered P3HT.…”

Section: Resultsmentioning

confidence: 99%

“…Then, acetonitrile was added as an additive solvent with a concentration of 10 vol% just before use. A detail of ESD setup is described in the previous paper [14], and the supply speed of P3HT:PCBM solution was estimated from a movement of liquid face in a glass capillary. Separately, the concentration of P3HT:PCBM solution was 10:10 mg/mL in o-dichlorobenzene for spin-coated samples (15:15 mg/mL for OPVs).…”

Section: Experimental Partmentioning

confidence: 99%

“…Here, S1 and S2 peaks correspond to crystal and amorphous phases of P3HT [14]. Then, the CP was calculated as CP = S1/(S1 ?…”

Section: Formation and Characterization Of P3ht:pcbm Thin Films And Opvsmentioning

confidence: 99%

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Spectroscopic study of P3HT:PCBM deposited by electrospray deposition

et al. 2016

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We investigated a molecular order of poly(3-hexylthiophene-2,5-diyl):[6,6]-phenyl-C 61 -butyric acid methyl ester thin film by judging from the Raman spectrum, and a crystallinity parameter was estimated as the molecular order of poly(3-hexylthiophene-2,5-diyl). The crystallinity parameter of spin-coated sample increased with increasing annealing temperature, and this result relates to the photoconversion efficiency of photovoltaic cell. This means that the high photoconversion efficiency can be obtained due to the high crystallinity parameter of poly(3-hexylthiophene-2,5-diyl), and this result is reasonable compared to the previous researches. In addition, the crystallinity parameter of electrosprayed thin film increased with increasing applied voltage, corresponding to the supply speed of solution. Since the droplet size increased with increasing supply speed, the evaporation speed of solvent (o-dichlorobenzene) became slow at the high applied voltage. Therefore, the slow evaporation speed of solvent caused the molecular order in the active layer. As a result, the maximum of approximately of 95 % was achieved even though the sample was not thermally annealed, and this value corresponds to the thermal annealing at 100°C.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental Partmentioning

confidence: 99%

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Spectroscopic study of P3HT:PCBM deposited by electrospray deposition

et al. 2016

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“…To improve PEDOT:PSS films, PEDOT:PSS solution was finally solvent‐treated. The incorporation of polar solvents increases the conductivity of polymer film . Here, acetonitrile of 5, 10, 20, and, 30 wt.% was used for solvent treatment.…”

Section: Resultsmentioning

confidence: 99%

Progress in photovoltaic performance of organic/inorganic hybrid solar cell based on optimal resistive Si and solvent modified poly(3,4‐ethylenedioxythiophene) poly(styrenesulfonate) junction

Seo

Sakamoto

Chou

et al. 2017

Progress in Photovoltaics

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Organic/inorganic hybrid solar cells have attracted much attention with simple fabrication and high performance because the combination of organic and inorganic materials compensates their disadvantages each other. This work tried to realize highly efficient hybrid solar cell based on crystalline Si and poly(3,4‐ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) junction. Performance dependences on the resistivity of Si substrate and the thickness of PEDOT:PSS layers were analyzed. Photocurrent of hybrid solar cells strongly depended on Si substrate, while overall performance depended on total resistance of hybrid solar cells not Si substrate. The charge transfer of PEDOT:PSS layer was varied by its thickness, and the 30‐nm‐thick PEDOT:PSS layer showed the best characteristics of charge transfer. The conductivity of the PEDOT:PSS layer was finally improved by solvent treatment using acetonitrile. As a result, the photovoltaic performance was much enhanced, and it was defined by 0.56 V of VOC, 30.24 mA/cm2 of JSC, 0.68 of FF, and 11.52% of efficiency.

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“…At first, PTB7 and PC

_{71}

BM were dissolved in o ‐xylene at concentrations of 1.0 and 1.5 mg ml

^{- 1}

, respectively, and DIO (0.3 vol.%) was then added to the resulting solution. Subsequently, acetonitrile, acetone, dimethyl sulfoxide (DMSO), and N,N‐dimethylformamide (DMF) were also mixed in the resulting solution at a concentration of 20 vol.%, thus realizing the efficient electrospray due to their high dielectric constant and their low surface tension .…”

Section: Methodsmentioning

confidence: 99%

Highly efficient organic photovoltaic cells fabricated by electrospray deposition using a non‐halogenated solution

Takahira

Toda

Suzuki

et al. 2016

Physica Status Solidi (a)

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Since a large amount of solvents are needed for roll‐to‐roll printing processes of organic photovoltaic cells, an environmentally friendly process for practical mass production systems is in high demand. In this research, a highly efficient organic photovoltaic cell was successfully demonstrated by the electrospray deposition method using a non‐halogenated solvent, o‐xylene. An addition of acetonitrile and 1,8‐diiodooctane drastically reduced domain size of the organic active layer, resulting in improved device performance. In addition, the photoconversion efficiency was continuously increased with increasing the solvent evaporation time of a droplet deposited on a substrate, and the highest photoconversion efficiency of 5.6% was achieved by optimizing the solvent evaporation time. Current‐density–voltage characteristics under irradiation with AM 1.5 light and corresponding AFM images of the active layers electrosprayed with and without the addition of 1,8‐diiodooctane in o‐xylene and acetonitrile.

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Improved Power Conversion Efficiency of Organic Photovoltaic Cell Fabricated by Electrospray Deposition Method by Mixing Different Solvents

Cited by 24 publications

References 67 publications

Spectroscopic study of P3HT:PCBM deposited by electrospray deposition

Spectroscopic study of P3HT:PCBM deposited by electrospray deposition

Progress in photovoltaic performance of organic/inorganic hybrid solar cell based on optimal resistive Si and solvent modified poly(3,4‐ethylenedioxythiophene) poly(styrenesulfonate) junction

Highly efficient organic photovoltaic cells fabricated by electrospray deposition using a non‐halogenated solution

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