Correlation of Degradation of P3HT:PCBM And P3HT:ITIC Organic Solar Cells with Changes of their Optical Spectra

Zakhidov, E. A.; Zakhidova, M. A.; Imomov, Mukhib; Kuvondikov, Vakhobjon; Нематов, Ш. К.; Saparbaev, Aziz; Tazhibaev, I. I.

doi:10.1007/s10812-020-01024-z

Cited by 5 publications

(2 citation statements)

References 25 publications

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“…Despite the rapid improvement in the power conversion efficiency in the recent past, the progress toward commercialization of these devices is still hindered by their low carrier mobility, insufficient photoabsorption (Li et al, 2018), and degradation by intrinsic factors such as inter-layer molecular cross diffusion. Additionally, external factors such as moisture and photo-oxidation have been found to affect device stability (Zakhidov et al, 2020). One strategy to enhance the device performance is to increase the photo generated current through extending the light harvesting capabilities to a broad absorption window (Yang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Comparative Investigation of Fullerene PC71BM and Non-fullerene ITIC-Th Acceptors Blended With P3HT or PBDB-T Donor Polymers for PV Applications

et al. 2021

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Fundamentally, organic solar cells (OSCs) with a bulk-heterojunction active layer are made of at least two electronically dissimilar molecules, in which photoabsorption in one (donor) generates Frenkel excitons. The formation of free charge carriers emerge after exciton dissociation at the donor:acceptor interface. In the past decade, most of the progress in enhanced device performance has been steered by the rapid development of novel donor and acceptor materials and on device engineering. Among these donor materials, regioregular poly(3-hexylthiophene) (P3HT) produced better performance despite the mismatch of its absorption coefficient with the solar emission spectrum. Comparatively the donor PBDB-T exhibits an outstanding absorption coefficient with a deeper-lying highest occupied molecular orbital (HOMO) level. Previously most of the efficient acceptors were based on fullerene molecules characterized by limited photoabsorption and stability. In contrast, the recently developed non-fullerene OSCs have a tunable absorption spectrum and exhibit improved stability. In this work, we explore the fundamental sources of the differences in the device performance for different blend compositions made of fullerene derivative (PC71BM) and non-fullerene (ITIC-Th) when paired with the polymer donors P3HT and PBDB-T. The characteristic changes of the optical properties of these blends and their roles in device performance are also investigated. We also studied charge generation where PBDB-T:PC71BM showed the highest maximum exciton generation rate (Gmax) of 3.22 × 1028 s–1 while P3HT: ITIC-Th gave the lowest (0.96 × 1028 s–1). Also noted, PC71BM based counterparts gave better charge transfer capabilities as seen from the lower PL quenching and higher charge carrier dissociation plus collection probability P(E,T) derived from a plot of Jph/Jsat ratio under short-circuit conditions against the effective voltages.

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Section: Introductionmentioning

confidence: 99%

Comparative Investigation of Fullerene PC71BM and Non-fullerene ITIC-Th Acceptors Blended With P3HT or PBDB-T Donor Polymers for PV Applications

et al. 2021

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“…An analysis of the experimental results [2] obtained using the TDS, TE, and PI methods of CsCl molecules showed that the graphite film is elevated above the iridium surface, and the valence-unsaturated edges of the graphite islands are closed by metal atoms. This suggests that graphite films can be bent, which is confirmed by the example of fullerenes having a spherical shape [5][6][7].…”

Section: Methodsmentioning

confidence: 65%

Surface ionization of CsCl molecules in the learning process

et al. 2023

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The paper presents the results of studying the catalytic properties of “metal-carbon” systems using the method of surface ionization of CsCl molecules. Using the Ir-C system as an example, it was shown that the poisoning effect of the same poison (carbon) strongly depends on the structure of the layer formed on the catalyst. In metals that do not form bulk carbides, the carbon monolayer completely poisons the catalytic properties of these metals. It is shown that individual atoms and clusters of samarium deposited on iridium coated with a monolayer of graphite lead to efficient catalytic dissociation of CsCl molecules. The mechanism of formation of a carbon film on the surface of a metal obtained by diffusion from the volume, which differs from the mechanism of formation of a carbon film obtained on the surface of a metal by adsorption, has been elucidated.

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The roles of acceptors in the thermal-degradation of P3HT based organic solar cells

Mohammed

Hone

Mola

et al. 2023

Physica B: Condensed Matter

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Correlation of Degradation of P3HT:PCBM And P3HT:ITIC Organic Solar Cells with Changes of their Optical Spectra

Cited by 5 publications

References 25 publications

Comparative Investigation of Fullerene PC71BM and Non-fullerene ITIC-Th Acceptors Blended With P3HT or PBDB-T Donor Polymers for PV Applications

Comparative Investigation of Fullerene PC71BM and Non-fullerene ITIC-Th Acceptors Blended With P3HT or PBDB-T Donor Polymers for PV Applications

Surface ionization of CsCl molecules in the learning process

The roles of acceptors in the thermal-degradation of P3HT based organic solar cells

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