Roll coated large area ITO- and vacuum-free all organic solar cells from diketopyrrolopyrrole based non-fullerene acceptors with molecular geometry effects [PDF]
, 2016 In this paper, we investigate three diketopyrrolopyrrole (DPP) based small molecular non-fullerene acceptors, namely Ph(DPP)₃, Ph(DPP)₂, and PhDMe(DPP)₂, focusing on molecular geometry effects on the frontier orbital level, light absorption, molecular ...
Andersen, Thomas Rieks +8 more
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Use of side-chain for rational design of n-type diketopyrrolopyrrole-based conjugated polymers: what did we fing out? [PDF]
, 2014 Cataloged from PDF version of article.The primary role of substituted side chains in organic semiconductors is to increase their solubility in common organic solvents. In the recent past, many literature reports have suggested that the side chains play a
Anthopoulos, T. D. +6 more
core +1 more source
Direct arylation polycondensation for the synthesis of bithiophene-based alternating copolymers [PDF]
, 2013 Direct arylation polycondensation reactions using a simple catalytic system gave eight kinds of bithiophene-based alternating copolymers. The conditions for the reactions of 3,3′,4,4′-tetramethylbithiophene with dibromoarylenes were optimized to obtain ...
Choi Seong Jib +10 more
core +1 more source
Near‐Infrared Dyes and Fluorophores Based on Diketopyrrolopyrroles [PDF]
Angewandte Chemie International Edition, 2007 Our research activities over the last few decades have concerned correlations between molecular structure and fluorescence. 2] A central theme of the research has been the synthesis and spectroscopic investigations of near-infrared (NIR) dyes to get insights into what degree the obtainable fluorescence quantum yields are restricted by the S0$S1 energy ...
Fischer, Georg +3 more
openaire +4 more sources
Exploring the origin of high optical absorption in conjugated polymers [PDF]
, 2016 The specific optical absorption of an organic semiconductor is critical to the performance of organic optoelectronic devices. For example, higher light-harvesting efficiency can lead to higher photocurrent in solar cells that are limited by sub-optimal ...
Ashraf, RS +11 more
core +3 more sources
Parallel triplet formation pathways in a singlet fission material
Nature Communications, 2022 The singlet fission mechanism is still not relatively well understood, except for polyacenes. Here, the authors demonstrate that in diketopyrrolopyrrole supramolecular assemblies, both singlet fission and intersystem crossing can simultaneously happen.
Nilabja Maity +11 more
doaj +1 more source
Singlet Fission within Diketopyrrolopyrrole Nanoparticles in Water [PDF]
Chemistry of Materials, 2017 Nanoparticles (NPs) of the singlet fission chromophore 3,6-bis(5-phenylthiophen-2-yl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione (PhTDPP) having average hydrodynamic diameters of 63–193 nm were prepared by rapidly injecting variable concentrations of PhTDPP solutions in tetrahydrofuran into water. These PhTDPP NPs are stable over months in water and exhibit
Catherine M. Mauck +5 more
openaire +1 more source
Molecular Electronic Coupling Controls Charge Recombination Kinetics in Organic Solar Cells of Low Bandgap Diketopyrrolopyrrole, Carbazole, and Thiophene Polymers [PDF]
, 2013 Low-bandgap diketopyrrolopyrrole- and carbazole-based polymer bulk-heterojunction, solar cells exhibit much faster charge carrier recombination kinetics than that encountered for less-recombining poly(3-hexylthiophene).
Bisquert, Juan +6 more
core +2 more sources
Solvatofluorochromic, non-centrosymmetric π-expanded diketopyrrolopyrrole
Organic & Biomolecular Chemistry, 2016 A donor–acceptor type π-expanded diketopyrrolopyrrole behaves as non-centrosymmetric as far as linear optical properties are concerned but as ‘pseudo-symmetric’ for two-photon absorption.
Grzybowski, Marek +8 more
openaire +4 more sources
Molecules, 2022 The search for accurate and sensitive methods to detect chemical substances, namely cations and anions, is urgent and widely sought due to the enormous impact that some of these chemical species have on human health and on the environment.
Carla Queirós +5 more
doaj +1 more source