Optical absorption of poly(3-alkylthiophenes) at low temperatures
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Cited by (123)
Synthesis and properties of a P3HT-based ABA triblock copolymer containing a perfluoropolyether central segment
2019, Synthetic MetalsCitation Excerpt :The UV–vis absorption spectrum of the P3HT-b-PFPE-b-P3HT films prepared by drop-casting a 0.5 mg mL−1 polymer solution exhibits a similar absorption profile to that of pure P3HT, with an absorption maximum at 558 nm as well as a shoulder at 605 nm (Figure S8 in the Supporting Information) [59]. The presence of this shoulder is attributed to the vibronic progression of the CC stretching mode (ΔE = 0.15 eV) [60]. This vibronic structure also supports the formation of the P3HT crystalline domains in the film.
Targeting ideal acceptor-donor materials based on hexabenzocoronene
2018, Journal of Molecular StructureCitation Excerpt :Over the last fifteen years or so, polymer-based organic photovoltaic (OPV) devices have relied on the blend of poly(3-hexylthiophene):[6,6]-phenyl C61 butyric acid methyl ester (P3HT:PC61BM) as a benchmark for the transformation of visible light into electricity. P3HT was one of the first polymers to show acceptable yields in this type of device [1–3], whereas fullerene C60 derivatives have been used as n-type materials since the discovery of ultrafast electron transfer at the beginning of the 90s [4]. Fullerene based materials, such as PC61BM, are still by far the most commonly used n-type materials in OPVs [5–7], regardless of the p-type material.
Self-assembly of regioregular poly (3,3‴-didodecylquarterthiophene) in chloroform and study of its junction properties
2017, Materials Science and Engineering: BCitation Excerpt :The maximum absorption peak at 473 nm in the isolated rr-PQT-12 appeared due to π-π∗ transition in either concentration. However, upon ageing, one additional shoulder peak at 603 nm was appeared due to coupling of π-π∗ transition to the CC in the thiophene ring as also reported for P3HT (cf. Fig. 1Ia, Ib and Ic with that of Ia′, Ib′ and Ic′) [31,32]. This shoulder peak goes on increasing with increase in concentration as well as with passage of time due to self-assembly of polymer causes change in optical density.