Effect of Poly(3-Hexylthiophene):Mixed Fullerene Indene-C60 Multi-Adducts Ratios on the Performance of Organic Solar Cells

Tarikhum, Hassan; A Abdullah, Basil; Almyahi, Furqan; Mahdi, Mazin

doi:10.22068/ijmse.3147

Volume 20, Issue 2 (June 2023) IJMSE 2023, 20(2): 1-14 | Back to browse issues page

‎ 10.22068/ijmse.3147

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Tarikhum H, A Abdullah B, Almyahi F, Mahdi M. Effect of Poly(3-Hexylthiophene):Mixed Fullerene Indene-C60 Multi-Adducts Ratios on the Performance of Organic Solar Cells. IJMSE 2023; 20 (2) :1-14
URL: http://ijmse.iust.ac.ir/article-1-3147-en.html

Effect of Poly(3-Hexylthiophene):Mixed Fullerene Indene-C60 Multi-Adducts Ratios on the Performance of Organic Solar Cells

Hassan Tarikhum

, Basil A Abdullah

, Furqan Almyahi

, Mazin Mahdi

Abstract: (8041 Views)

In this study, poly(3-hexylthiophene) (P3HT) and fullerene Indene-C₆₀ multi-adducts (ICxA) were blended to create a formulation as a solution and thin films, which were prepared under ambient conditions. The optical properties of various compositional ratios were studied using UV-Visible absorbance and photoluminescence (Pl) measurements. The energy gaps of the prepared thin films and solutions were determined, and their values increased with increasing fullerene ratio because of the isolation of P3HT chains from their neighbors. Intensity ratio (I_C=C/I_C-C) with a small value in addition to a low value of full width at high maximum (FWHM) of Raman spectra are associated with increased conformation and high aggregation of composition. Furthermore, according to X-ray diffraction (XRD) results the 1:0.8 and 1:0.6 ratios have the largest crystallite sizes in comparison to the other ratios. The highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) levels for blends by electrochemical measurements were determined, which are sandwiched between those of the pure materials. In ambient conditions, binary organic photovoltaic cells (OPVs) at different ratios of the photoactive layer were evaluated. The device with a ratio of 1:0.6 had the best performance, with power conversion efficiency (PCE) of 1.21 %, open circuit voltage (V_OC) of 0.53 V, short circuit current density (J_SC) of 5.71 mA.cm^-2, and fill factor (FF) of 39.5 % at a small V_loss of 1.39 V.

Keywords: Organic photovoltaics, Photoluminescence, X-ray diffraction, Raman spectrum, Cyclic Voltammetry.