2018
DOI: 10.1002/adfm.201804858
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Conjugated Block Copolymers as Model Systems to Examine Mechanisms of Charge Generation in Donor–Acceptor Materials

Abstract: Fully conjugated donor–acceptor block copolymers are established as model systems to elucidate fundamental mechanisms of photocurrent generation in organic photovoltaics. Using analysis of steady‐state photoluminescence quenching, exciton dissociation to a charge transfer state within individual block copolymer chains is quantified. By making a small adjustment to the conjugated backbone, the electronic properties are altered enough to disrupt charge transfer almost entirely. Strong intermolecular coupling of … Show more

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Cited by 17 publications
(21 citation statements)
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“…Over the past two decades, several research groups, including our own, have been studying new materials that covalently anchor the electron donor (D) and acceptor (A) moieties . PSCs bearing above‐mentioned materials have recently been studied in two main forms.…”
Section: Introductionmentioning
confidence: 99%
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“…Over the past two decades, several research groups, including our own, have been studying new materials that covalently anchor the electron donor (D) and acceptor (A) moieties . PSCs bearing above‐mentioned materials have recently been studied in two main forms.…”
Section: Introductionmentioning
confidence: 99%
“…One is a double‐cabled polymer composed mainly of a small conjugated molecular acceptor bound to the side chains of a main chain conjugated polymer donor . The other is a conjugated block copolymer (CBCP) combining the donor block (DB) and the acceptor block (AB) in a polymer chain . Among them, studies on CBCP have attracted significant attention because they are relatively simple to synthesize and can lead to the design of various types of CBCPs.…”
Section: Introductionmentioning
confidence: 99%
“…Single‐component organic solar cells (SCOSCs) are under investigation due to their advantage in minimizing procedures for preparing ready‐to‐coat organic conductive ink and photoactive layer, as well as their remarkably stable morphology. [ 1–5 ] In general, SCOSCs can be classified into three main categories according to the molecular structure of the photovoltaic materials, which are block conjugated polymers, [ 6–8 ] organic–fullerene molecular dyads, [ 4,9–12 ] and recently emerged “double‐cable” conjugated polymers. [ 1–3,13 ] It is worth noting that SCOSCs have already exhibited superiority in simplifying device fabrication, improving device stability, and more.…”
Section: Introductionmentioning
confidence: 99%
“…Apart from the “double‐cable” conjugated polymers, there are barely any other types of SCOSCs with the PCE exceeding 7%. We believe that a promising path toward higher efficiency SCOSCs is to develop narrow‐bandgap materials with absorbance extended to the near‐infrared (NIR) region, [ 8,22 ] which is most straightforward to enhance the photocurrent.…”
Section: Introductionmentioning
confidence: 99%
“…Conjugated materials for SCOSCs mainly contain diblock conjugated polymers, double-cable conjugated polymers, and molecular dyads. Among them, diblock conjugated polymers, including rod–rod and rod–coil structures, have been widely studied due to their tendency to form donor/acceptor lamellar structures, which are recognized as the ideal morphology for charge separation and transport in OSCs. The PCEs of SCOSCs based on diblock conjugated polymers have been close to 4% . Molecular dyads containing electron donor and acceptor have also been explored for SCOSCs with PCEs around 3%. Double-cable conjugated polymers with conjugated backbone as donor and aromatic side units as acceptor have also received much attention in the last twenty years, in which the PCEs of double-cable polymer-based SCOSCs could reach more than 5% .…”
Section: Introductionmentioning
confidence: 99%