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Article Dans Une Revue Journal of Materials Chemistry C Année : 2016

Thiazole-based scaffolding for high performance solar cells

Stéphane Mery

Résumé

An interesting way of decreasing both HOMO and LUMO energy levels simultaneously while keeping the band-gap constant in soluble electron-donor small molecules for photovoltaic applications is presented. This consists in the replacement of thiophene rings by thiazole units in small molecules based on the alternation of electron-rich and electron-deficient moieties. A new diketopyrrolopyrrole-based dumbbell-shaped electron-donor soluble molecule for organic photovoltaic applications has been synthesized and characterized. It includes thiazole units as linkers between the bis-lactam core and the triazatruxene moieties used as π-stacking platforms. A power conversion efficiency of 6.3% has been attained with this thiazole derivative and in particular with an increase of the open-circuit voltage of 0.15 V with respect to the thiophene-based organic semiconducting counterpart. This open-circuit voltage increase is due to the lowering of the HOMO level of the thiazole derivative while its LUMO level has also been stabilized as highlighted by the similar band-gap measured for the thiazole and thiophene derivatives.

Domaines

Matériaux
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Dates et versions

hal-03146243 , version 1 (18-02-2021)

Identifiants

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Ibrahim Bulut, Patricia Chavez Vasquez, Antoine Mirloup, Quentin Huaulmé, Anne Hebraud, et al.. Thiazole-based scaffolding for high performance solar cells. Journal of Materials Chemistry C, 2016, 4 (19), pp.4296-4303. ⟨10.1039/C6TC00531D⟩. ⟨hal-03146243⟩
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