Ffect of Alcohol Solvents on the Structural, Opticaland Electrical Characteristics of Pedot:pss Polymer Films Annealed at Low Atmospheric Pressure

Aimukhanov, А.К.

doi:10.31489/2022no2/35-41

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…As results, poor hole injection and severe recombination processes occurs in OCSs. To solve this problem, researchers have proposed various methods for modifying and introducing additives into PEDOT: PSS [17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Effect of WS2 nanoparticles on the current-voltage characteristics of a polymer solar cell

Rozhkova¹,

Aimukhanov²,

Tussupbekova³

et al. 2023

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The paper presents the results of studies of the effect of tungsten disulfide nanoparticles on the optical and electrotransport characteristics of PEDOT: PSS thin films in polymer solar cells. Tungsten disulfide (WS2) nanoparticles were obtained by laser ablation in isopropyl alcohol. The average size of nanoparticles were determined by dynamic light scattering and is ~38 nm. The concentration of WS2 nanoparticles in the solution was calculated based on the density of the WS2 substance. The absorption spectrum of nanoparticles in isopropyl alcohol has been measured. Two bands are observed in 500-900 nm regions, which are associated with direct exciton transitions A1 and B1 in two-dimensional transition metal dichalcogenides with 2H phase. WS2 nanoparticles were added in PEDOT: PSS solution and thin films were deposited from the prepared solution by spin-coating. PEDOT: PSS thin films doped with WS2 were studied by atomic force microscopy (AFM). The arithmetic mean deviation of the surface roughness (Ra) was estimated. Doping with WS2 nanoparticles leads to the increase in Ra of PEDOT: PSS thin films. The optical absorption spectra of doped films have been measured. Also, doping PEDOT: PSS with WS2 nanoparticles results in a long-wavelength shift of the PEDOT absorption maximum. The optimal concentration of WS2 nanoparticles for the preparation of doped PEDOT: PSS thin films is determined, at which the film resistance decreases by almost 2 times, the recombination resistance of charge carriers increases by 4.7 times, and the efficiency of the polymer solar cell increases to 1.94 %.

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Section: Introductionmentioning

confidence: 99%

Effect of WS2 nanoparticles on the current-voltage characteristics of a polymer solar cell

Rozhkova¹,

Aimukhanov²,

Tussupbekova³

et al. 2023

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Influence of Spiro-Ometad Film Thickness on the Structural and Electrical Properties of Perovskite Solar Cells

S.K. Tazhibayev

2024

Eurasian phys. tech. j.

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This work investigates the effect of the hole transport layer (HTL) thickness of Spiro-OMeTAD on the electrical transport properties in perovskite solar cells (PSCs). Spiro-OMeTAD films were obtained by the spin-coating method at centrifuge rotation speeds from 2000 to 7000 rpm. The thickness and morphology of the Spiro-OMeTAD films were studied by atomic force microscopy (AFM). From the obtained AFM image data, an increase in the surface root mean square (rms) value is observed with decreasing film thickness. A decrease in film thickness leads to an increase in Energy gap (Eg) from 2.97 eV to 3.01 eV. We observe that at a layer thickness of 260 nm, the efficiency of the cells reaches its maximum value; further increasing the layer thickness reduces the efficiency. Analysis of the impedance spectra of PSCs showed that the optimal layer thickness reduces the HTL resistance and increases the recombination resistance at the perovskite/HTL interface, which increases the effective lifetime of charge carriers. Images of the surface and current distribution of Spiro-OMeTAD on the surface of the perovskite layer were studied. A non-uniform current distribution on the surface of the samples was revealed, the observed spots with high conductivity are interpreted as perovskite quantum dots, which have better photovoltaic characteristics.

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Ffect of Alcohol Solvents on the Structural, Opticaland Electrical Characteristics of Pedot:pss Polymer Films Annealed at Low Atmospheric Pressure

Cited by 2 publications

References 23 publications

Effect of WS2 nanoparticles on the current-voltage characteristics of a polymer solar cell

Effect of WS2 nanoparticles on the current-voltage characteristics of a polymer solar cell

Influence of Spiro-Ometad Film Thickness on the Structural and Electrical Properties of Perovskite Solar Cells

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