Efficient 3D charge transport in planar triazatruxene-based dumbbell-shaped molecules forming a bridged columnar phase
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status: published
Design of narrow bandgap non-fullerene acceptors for photovoltaic applications and investigation of non-geminate recombi...
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A new narrow bandgap non-fullerene electron acceptor was designed, synthesized, and characterized for near-infrared organic photovoltaics.
Ring fusion in tetrathienylethene cored perylene diimide tetramers affords acceptors with strong and broad absorption in...
In this work, we designed and synthesized two novel perylene diimide (PDI) tetramers based on a tetrathienylethene core, named TTE-PDI4 and FTTE-PDI4, and investigated their application as non-fullerene acceptors for organic photovoltaics. The free rotation of PDIs and adjacent thiophene units renders TTE-PDI4 with a highly twisted molecular geomet...
Core fluorination enhances solubility and ambient stability of an IDT‐based n‐type semiconductor in transistor devices
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The synthesis of a novel fluorinated n‐type small molecule based on an indacenodithiophene core is reported. Fluorination is found to have a significant impact on the physical properties, including a surprisingly dramatic improvement in solubility, in addition to effectively stabilizing the lowest‐unoccupied molecular orbital energy (−4.24 eV). Sin...
Naphthalene flanked diketopyrrolopyrrole: A new DPP family member and its comparative optoelectronic properties with thi...
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Diketopyrrolopyrrole (DPP) has been one of the most promising building blocks for constructing organic semiconducting materials used in organic field-effect transistors (OFET). As we have known, extended p-conjugated structure can facilitate intermolecular orbital coupling which determines the magnitude of the charge transfer integral and thus the ...
Control of donor-acceptor photophysics through structural modification of a “twisting” push-pull molecule
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In contemporary organic solar cell (OSC) research, small A-D-A molecules comprising electron donor (D) and acceptor (A) units are increasingly used as a means to control the optoelectronic properties of photovoltaic blends. Slight structural variations to these A-D-A molecules can result in profound changes to the performance of the OSCs. Herein, w...
Spectroscopic investigation of the effect of microstructure and energetic offset on the nature of interfacial charge tra...
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Despite performance improvements of organic photovoltaics, the mechanism of photoinduced electron-hole separation at organic donor-acceptor interfaces remains poorly understood. Inconclusive experimental and theoretical results have produced contradictory models for electron-hole separation in which the role of interfacial charge-transfer (CT) stat...
Suppression of trap assisted non-geminate recombination by incorporation of multilayer graphene in P3HT:PCBM for stable ...
In the present work, multilayer graphene (MLG) has been demonstrated to be a promising material for improvement in power conversion efficiency (PCE) as well as stability of the polymer based photovoltaic (PV) devices. MLG, when incorporated into the active layer of the P3HT:PCBM based PV device provides additional 2D pathways for long distance elec...
X-ray crystal structure, Hirshfeld surface analysis, thermal stability and photophysical properties of some symmetrical ...
Universal selection rule for surfactants used in miniemulsion processes for eco-friendly and high performance polymer se...
Commercial interest in the environmentally friendly processing of polymer semiconductors is on the rise. To reduce noxious solvent use and to realize water-borne colloids of polymer semiconductors, we developed a universal and eco-friendly miniemulsion process to satisfy four essential criteria: (1) efficient emulsification for synthesizing small a...
