Journal ArticleDOI
Triphenylamine-Thienylenevinylene Hybrid Systems with Internal Charge Transfer as Donor Materials for Heterojunction Solar Cells
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TLDR
Star-shaped molecules based on a triphenylamine core derivatized with various combinations of thienylenevinylene conjugated branches and electron-withdrawing indanedione or dicyanovinyl groups have been synthesized, showing that the introduction of the electron-acceptor groups induces an intramolecular charge transfer that results in a shift of the absorption onset toward longer wavelengths and a quenching of photoluminescence.Abstract:
Star-shaped molecules based on a triphenylamine core derivatized with various combinations of thienylenevinylene conjugated branches and electron-withdrawing indanedione or dicyanovinyl groups have been synthesized. UV−vis absorption and fluorescence emission data show that the introduction of the electron-acceptor groups induces an intramolecular charge transfer that results in a shift of the absorption onset toward longer wavelengths and a quenching of photoluminescence. Cyclic voltammetry shows that all compounds present a reversible first oxidation process whose potential increases with the number of electron-withdrawing groups in the structure. Prototype bulk and bilayer heterojunction solar cells have been realized using fullerene C60 derivatives as acceptor material. The results obtained with both kinds of devices show that the introduction of electron-acceptor groups in the donor structure induces an extension of the photoresponse in the visible spectral region, an increase of the maximum external...read more
Citations
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Small molecule organic semiconductors on the move: promises for future solar energy technology.
Amaresh Mishra,Peter Bäuerle +1 more
TL;DR: On the eve of commercialization of organic solar cells, this review provides an overview over efficiencies attained with small molecules/oligomers in OSCs and reflects materials and device concepts developed over the last decade.
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Small molecule semiconductors for high-efficiency organic photovoltaics
TL;DR: This review summarizes the developments in small molecular donors, acceptors, and donor-acceptor dyad systems for high-performance multilayer, bulk heterojunction, and single-component OPVs and focuses on correlations of molecular chemical structures with properties, such as absorption, energy levels, charge mobilities, and photovoltaic performances.
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Functional oligothiophenes: molecular design for multidimensional nanoarchitectures and their applications.
TL;DR: Dithieno[3,2-b:2′3′-d]thiophene-4,4-dioxides 1221 3.3.1.
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The energy of charge-transfer states in electron donor-acceptor blends : insight into the energy losses in organic solar cells
TL;DR: In this article, a general experimental method to determine the energy ECT of intermolecular charge transfer (CT) states in electron donor-acceptor (D-A) blends from ground state absorption and electrochemical measurements is proposed.
Journal ArticleDOI
Small Molecule Solution-Processed Bulk Heterojunction Solar Cells†
TL;DR: The major classes of molecular donors have been reported in the literature in the past several years and highlights some of key considerations in molecular heterojunction design compared to polymer-based bulk heterojunctions as mentioned in this paper.
References
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Thermally stable, efficient polymer solar cells with nanoscale control of the interpenetrating network morphology
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Journal ArticleDOI
Photoinduced electron transfer from a conducting polymer to buckminsterfullerene.
TL;DR: Because the photoluminescence in the conducting polymer is quenched by interaction with C60, the data imply that charge transfer from the excited state occurs on a picosecond time scale.
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Plastic Solar Cells
TL;DR: In this article, the photo-induced electron transfer leads to a number of potentially interesting applications, which include sensitization of the photoconductivity and photovoltaic phenomena, and their potential in terrestrial solar energy conversion discussed.