New polythiophene‐based hybrid conjugated polymers (P2 and P3) containing different amounts of hexamolybdate clusters, which are covalently embedded in the main chain, were successfully synthesized by using the Stille coupling reaction. These soluble hybrid polymers show absorptions in the 400–550 nm range in dilute solutions, which extend beyond 700 nm in thin films. The hybrid polymers are moderately fluorescent in dilute solutions, and the embedded polyoxometalates only partially quench the backbone fluorescence. Simple single‐layer photovoltaic cells with a device configuration of ITO/PEDOT:PSS/(P2 or P3)/Ca/Al were fabricated, and a power conversion efficiency of 0.24 % was obtained for P2, which is among the highest values reported for POM‐containing hybrid polymers including hybrid diblock copolymers.
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Wang et al. (2015) studied this question.
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