Journal ArticleDOI
Effect of interchain interactions on the absorption and emission of poly(3-hexylthiophene)
Peter J. Brown,D. Steve Thomas,Anna Köhler,Joanne S. Wilson,Ji-Seon Kim,Catherine Ramsdale,Henning Sirringhaus,Richard H. Friend +7 more
TLDR
In this article, it was shown that the lowest energy feature in the region of the absorption spectrum is associated with an interchain absorption, the intensity of which is correlated with the degree of order in the polymer.Abstract:
The absorption spectrum of polythiophene and its derivative poly(3-hexylthiophene) (P3HT) is usually described in terms of an intrachain exciton coupled to a single phonon mode. We show that this model is too simplistic for highly ordered, regioregular P3HT and that, analogous to the case of charged polarons in this material, interchain interactions must be taken into account to correctly describe the absorption spectrum. We show that the lowest energy feature in the $\ensuremath{\pi}\ensuremath{-}{\ensuremath{\pi}}^{*}$ region of the absorption spectrum is associated with an interchain absorption, the intensity of which is correlated with the degree of order in the polymer. Correspondingly, we show that the emission from P3HT also exhibits contributions from both interchain and intrachain states, in a manner similar to that recently shown for poly(phenylenevinylene). Having reinterpreted the physical origin of the features in the absorption and emission spectra of P3HT, we then model these spectra and show how they evolve as the degree of order in the polymer is changed by varying several physical parameters including temperature and regioregularity of the polymer.read more
Citations
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Journal ArticleDOI
Conjugated polymer-based organic solar cells
TL;DR: This review gives a general introduction to the materials, production techniques, working principles, critical parameters, and stability of the organic solar cells, and discusses the alternative approaches such as polymer/polymer solar cells and organic/inorganic hybrid solar cells.
Journal ArticleDOI
Polymer–Fullerene Composite Solar Cells
TL;DR: Polymer-based organic photovoltaic systems hold the promise for a cost-effective, lightweight solar energy conversion platform, which could benefit from simple solution processing of the active layer.
Journal ArticleDOI
A strong regioregularity effect in self-organizing conjugated polymer films and high-efficiency polythiophene:fullerene solar cells
Youngkyoo Kim,Steffan Cook,Sachetan M. Tuladhar,Stelios A. Choulis,Jenny Nelson,James R. Durrant,Donal D. C. Bradley,Mark Giles,Iain McCulloch,Chang-Sik Ha,Moonhor Ree +10 more
TL;DR: In this article, the influence of polymer regioregularity (RR) on the molecular nanostructure, and hence on the resulting material properties and device performance has been investigated, which can be attributed to enhanced optical absorption and transport resulting from the organization of P3HT chains and domains.
Journal ArticleDOI
Extraordinary Sunlight Absorption and One Nanometer Thick Photovoltaics Using Two-Dimensional Monolayer Materials
TL;DR: This work shows that two-dimensional monolayer materials hold yet untapped potential for solar energy absorption and conversion at the nanoscale and demonstrates that 1 nm thick active layers can attain power conversion efficiencies of up to ~1%, corresponding to approximately 1-3 orders of magnitude higher power densities than the best existing ultrathin solar cells.
Journal ArticleDOI
Morphology of polymer/fullerene bulk heterojunction solar cells
TL;DR: In this article, the authors combined and summarized the experimental findings on this nanomorphology-efficiency relationship and proposed a bicontinuous interpenetrating phase structures within these blend films.
References
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Book
Introduction to Quantum Mechanics
TL;DR: A new chapter on symmetries, new problems and examples, improved explanations, more numerical problems to be worked on a computer, new applications to solid state physics, and consolidated treatment of time-dependent potentials as discussed by the authors.
Book
Molecular Quantum Mechanics
Peter Atkins,Ronald S. Friedman +1 more
TL;DR: In this paper, the Schrodinger equation has been used to describe the properties of the Schröter equation for electronic structure calculations and its application in the field of molecular mechanics.
Book
Introduction to Quantum Mechanics
B. H. Bransden,C. J. Joachain +1 more
TL;DR: The Schrodinger equation and the Ehrenfest theorem as mentioned in this paper have been applied to quantum physics, as well as the van der Waals interaction and the wave function of quantum systems.