Nan Wei , Lu Hao , Dawei Li , Ziqing Bian , Shuyue Song , Jiaxin He , Cuihong Li , Andong Zhang , Yahui Liu , Zhishan Bo
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Conjugated polymers with thiazolothiazole as the acceptor unit for high performance organic solar cells
In this study, we used a simple, cost-effective, and high-yield synthetic route to successfully synthesize two thiazolothiazole-based wide-bandgap donor polymers, namely TTZ and ANTTZ. We systematically investigated how the solubility, absorption and photoelectric properties of the materials were influenced by the position of ester group at the thiophene unit as π-bridge. Theoretical calculations, UV–vis spectroscopy and GIWAXS results revealed that TTZ possesses planar molecular backbone and higher crystallinity. Ultimately, with BTP-ec9-4F as the acceptor, the TTZ based devices can achieve an impressive power conversion efficiency (PCE) of 13.96%; whereas the ANTTZ based devices can give a PCE of only 3.07%. This research underscores the effectiveness of a cost-efficient donor material synthesis route and highlights the crucial influence of the side chain position on crystallinity of the polymer, offering a new direction for designing low-cost, high-efficiency photovoltaic materials.
期刊介绍:
Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied.
Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media.
The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.