Modulating chemical composition of the D-π-D-A-D type copolymers to obtain soluble Neutral-state green or dark Yellowish-black films with Multi-color electrochromism
Source abstract
Abstract
Novel high-performance D-π-D-A-D type polymeric electrochromic materials consisting of phenylene π-bridged core alternated with the donor cyclopentadithiophene derivatives and the D-A-D moiety thiophene-diketopyrrolo[3,4-c]pyrrole-thiophene (TDPPT), differing by the ratio of donor to acceptor units incorporated, were achieved by Suzuki cross-coupling reaction. The polymer films displayed intense dual visible absorptions in their neutral states, which were modulated both in the positions and relative intensities by regulating the chemical composition as well as the donor-to-acceptor ratio in the polymer backbone, allowing the facile manipulation of the neutral-state colors. The polymer PBDC-1 exhibited a deep green neutral-state color. PBDC-2 and PBDC-3 also demonstrated two strong and broad absorptions, but a relative small gap of transmission in the orange-yellow region, giving the films dark yellowish-black color. In situ optical monitoring revealed that all the polymers underwent surprising multi-color variations upon the redox cycling, simultaneous with fast switching speeds, high coloration efficiencies, and large optical contrasts.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Conducting polymers and applications · Transition Metal Oxide Nanomaterials · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (62)
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