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Displays have become ubiquitous in our modern and highly interconnected lives. Complex vacuum processed multi‐stacks are widely integrated into high tech, high value products such as smart phones, while solution processed large area single‐layer OLEDs appear more adequate for basic applications focusing on recyclability such as packaging, road signage, advertising, and single‐use health care products. In this context, we report herein the design, synthesis, and characterization of an accessible series of oligothiophenes end‐capped triphenylamines that were preprepared by atom‐economical direct (hetero)arylation reactions and successfully used as emitter in solution processed devices, from lab scale to large area printed and flexible demonstrator. [ABSTRACT FROM AUTHOR]

Produced at ton scale, vat dyes are major environmental pollutants generated by the textile industry. However, they represent ideal and accessible candidates for chemical upcycling since they are usually composed of large π‐conjugated scaffolds. Based on the valorization of "old" products, waste or even contaminant into high‐added value goods, this concept can be easily transposed to the laboratories. As a contribution to the current environmental and ecological transition, we demonstrate herein the valorization/upcycling of wastewaters generated during the dyeing procedure. To do so, the reduced (leuco) form of vat violet 10, also known as isoviolanthrone, was functionalized to afford a readily soluble derivative that was subsequently and successfully used as active material in operating solution processed light‐emitting electrochemical cells, that is, from textile dyeing to high‐tech application. [ABSTRACT FROM AUTHOR]

Benzothioxanthene imide (BTI) has recently emerged as an interesting and promising block for organic electronics. In this contribution, we report on the impact of the N-annulation of the latter dye on the optoelectronic of π-extended molecular structures. To do so, the thiophene-diketopyrrolopyrrole was selected, as central π-conjugated core, and either end-capped with two BTIs or its N-annulated version, namely the TCI. While almost similar band gaps were measured for individual rylene imide dyes, significant differences were highlighted, and rationalized, on their π-extended counterparts. [ABSTRACT FROM AUTHOR]

Hence, as a contribution to the current ecological transition, we demonstrate the valorization/upcycling of wastewaters, generated during the staining process, through the functionalization and use of the reduced ( I leuco i ) form of a vat dye, namely, violet 10, also known as isoviolanthrone. Keywords: vat dyes; upcycling; organic electronics; waste valorization; light emitting electrochemical cells EN vat dyes upcycling organic electronics waste valorization light emitting electrochemical cells 1 1 1 03/17/23 20230314 NES 230314 B Produced at a ton scale b for textile industries, vat dyes have a significant environmental impact as they are considered major water contaminants. Vat dyes, upcycling, organic electronics, waste valorization, light emitting electrochemical cells. [Extracted from the article]