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Electronic structure and photophysical properties of some promising organic molecules for organic solar cells

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Abstract

Context

Three novel organic semiconductors (Fig. 1), which are molecule (a) and molecule (c) have the same wing unit molecules (b) and (c) have the same core unit were reported. Thus, the influence of wing units on solar cell device performance parameters such us the opto-electronics properties, non-linear optics (NLO), electronic properties, and natural bond orbitals (NBO) were calculated in order to evincing molecular structure–property relations. The all studied molecules would be promising materials for photovoltaic applications, but molecule (c) could be an excellent candidate for high efficiency organic solar cells with a small energy gap, a lowest ΔGreg, highest Voc, and LHE values. According to all these results, it is seen that the wing units of the molecules affect both the opto-electronic properties and NLO properties more than the core units. These theoretical calculations is expected to obtain new strategies to synthesize efficient materials for organic solar cell devices.

Method

Density functional (DFT) and time-dependent density functional (TDDFT) theory simulations for the solar cell device performance parameters, non-linear optics, and natural bond analysis were performed using the Gaussian 09w software. The ground state properties of molecules have been studied with hybrid functional of Beckethree–Lee–Yang–Parr (B3LYP), and excited state properties have been calculated CAMB3LYP and our DFT calculations were performed using 6-31++G(d,p) basis set on fully optimized geometries.

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Funding

This study was supported by the Turkish Scientific and Research Council (TUBITAK) research grant (117F286).

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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by K. K. U. and S. S. The first draft of the manuscript was written by K. K. U., and K. K. U. contributed to the previous versions of the manuscript. All authors read and approved the final version of the manuscript.

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Correspondence to Kübra Karaoğlu Uzun.

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Uzun, K.K., Sayın, S. & Çevik, U. Electronic structure and photophysical properties of some promising organic molecules for organic solar cells. J Mol Model 29, 323 (2023). https://doi.org/10.1007/s00894-023-05728-9

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