Journal ArticleDOI
Ultrafast Singlet Exciton Fission Dynamics in 9,10-Bis(phenylethynyl)anthracene Nanoaggregates and Thin Films
TLDR
In this article, the authors show that 9,10-bis(phenylethynyl)anthracene (BPEA), an ethynyl derivative of anthracene and a widely used fluorescence molecular probe, exhibits an efficient singlet exciton fission process.Abstract:
The possibility of overcoming the Shockley–Queisser limit of organic solar cell (OSC) efficiency by multiexciton generation through singlet exciton fission has recently attracted significant research interest. Herein we show that 9,10-bis(phenylethynyl)anthracene (BPEA), an ethynyl derivative of anthracene and a widely used fluorescence molecular probe, exhibits an efficient singlet exciton fission process in the solid state. Steady state and time-resolved emission experiments carried out on a nanoaggregate and thin film of BPEA reveals an orders-of-magnitude reduction in emission yields and the singlet lifetime as compared to the near-unity emission yield and long emission lifetime in solution. Femtosecond and nanosecond resolved transient absorption studies unraveled exciton–exciton annihilation (at high excitation fluence) and singlet exciton fission to be the dominant relaxation processes with a fission yield of about 74 ± 6%. A high singlet fission yield with a long triplet lifetime (of about 30 μs) ...read more
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Research data supporting "Identification of a triplet pair intermediate in singlet exciton fission in solution"
TL;DR: In this paper, a triplet pair intermediate in singlet exciton fission in solution was identified using transient absorption, UV-vis absorption and photoluminescence spectroscopic measurements taken on solutions of TIPS-tetracene.
Journal ArticleDOI
Singlet Fission in 9,10-Bis(phenylethynyl)anthracene Thin Films
Youn Jue Bae,Gyeongwon Kang,Christos D. Malliakas,Jordan N. Nelson,Jiawang Zhou,Ryan M. Young,Yi Lin Wu,Richard P. Van Duyne,George C. Schatz,Michael R. Wasielewski +9 more
TL;DR: The results described here show that efficient SF occurs in polycrystalline thin films of 9,10-bis(phenylethynyl)anthracene (BPEA), a commercial dye that has singlet and triplet energies of 2.40 and 1.11 eV, respectively, in the solid state.
Journal ArticleDOI
Nonlinear optoelectronic processes in organic optoelectronic devices: Triplet-triplet annihilation and singlet fission
Xianfeng Qiao,Dongge Ma +1 more
TL;DR: The triplet-triplet annihilation (TTA) and singlet fission (SF) processes as mentioned in this paper are two dynamic reversible processes, which link one high-lying energy singlet with two lowlying energy triplet excitons on two neighboring chromophores.
Journal ArticleDOI
Molecular Insights and Concepts to Engineer Singlet Fission Energy Conversion Devices
Rubén Casillas,Ilias Papadopoulos,Tobias Ullrich,Dominik Thiel,Andreas Kunzmann,Dirk M. Guldi +5 more
TL;DR: In this paper, the fundamental processes of intermolecular and intramolecular singlet fission (SF) are discussed, and a collection of SF-materials, as well as available photophysical and electrochemical data for energy conversion research are presented.
Journal ArticleDOI
Interplay of exciton-excimer dynamics in 9,10-diphenylanthracene nanoaggregates and thin films revealed by time-resolved spectroscopic studies
TL;DR: The exciton dynamics of a highly emissive anthracene derivative, namely, 9,10-diphenylanthracene (DPA) in nanoaggregate, thin film and crystalline forms is presented and it is shown that the ordered molecular packing of the DPA molecules in thethin film and crystal facilitates significantly faster singlet exciton diffusion.
References
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Journal ArticleDOI
Detailed Balance Limit of Efficiency of p‐n Junction Solar Cells
TL;DR: In this article, an upper theoretical limit for the efficiency of p−n junction solar energy converters, called the detailed balance limit of efficiency, has been calculated for an ideal case in which the only recombination mechanism of holeelectron pairs is radiative as required by the principle of detailed balance.
Journal ArticleDOI
Recent Advances in Bulk Heterojunction Polymer Solar Cells
Journal ArticleDOI
Organic Optoelectronic Materials: Mechanisms and Applications
TL;DR: The article reviews the current understanding of the physical mechanisms that determine the (opto)electronic properties of high-performance organic materials and highlights the capabilities of various experimental techniques for characterization, summarizes top-of-the-line device performance, and outlines recent trends in the further development of the field.
Journal ArticleDOI
The future of organic photovoltaics
TL;DR: This tutorial review discusses the relevance of organic photovoltaics beginning with some of the economic drivers for these technologies, and examines the basic properties of these devices, including operation and materials requirements, in addition to presenting the development of the field from a historical perspective.
Journal ArticleDOI
Light Harvesting for Organic Photovoltaics
TL;DR: The fundamental processes in photovoltaic devices are described, with the main emphasis on the characterization of energy transfer and its role in dictating device architecture, including multilayer planar heterojunctions, and on the factors that impact free carrier generation from dissociated excitons.