Emissive, high charge transport polymers
First Claim
1. An aggregate composition comprising:
- a plurality of polymer molecules, each polymer molecule, prior to aggregation, comprising at least 7 monomer units or having a molecular weight of at least 7000 g/mol, having a fluorescence quantum yield of at least 2%, being electrically conductive or semiconductive, and having electrical properties such that electronic interactions extend at least 2 monomer units from their source such that a spectral comparison of one of the monomer units to the polymer molecule comprising such unit demonstrates a change in gap between the highest filled molecular or electronic orbital and the lowest unfilled molecular or electronic orbital of the monomer unit versus the polymer molecule of at least 0.1 eV, the aggregate comprising the polymer molecules arranged in a non-aligned, electronically-communicative manner providing a fluorescence quantum yield for the aggregate at least 0.05 times that of the individual quantum yields of the polymer molecules, an absorption spectrum having a unique, red-shifted absorption relative to an absorption spectrum of a random dispersion of the polymer molecules, and being stable in the absence of solvent for at least one minute in air at no less than 50 degrees Celsius, as indicated by a change in quantum yield of no greater than 5% and a change in wavelength of the unique absorption of no more than 5%.
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Accused Products
Abstract
The present invention generally relates to stable emissive aggregates of polymers. The aggregates are composed of various polymer molecules arranged in such a way as to allow extended electronic couplings between nearby polymer molecules, enhancing exciton transport, while minimizing the effects of quenching due to interchain interactions. For example, the polymer molecules may be arranged in a non-aligned, electronically-communicative manner (for example, at an oblique angle), stabilized by various methods such as chemical linkages or physical interactions. Within the aggregate, electronic interactions along the polymer molecule may extend to nearby polymer molecules, which may be observed as a shift in the absorption spectra relative to a random dispersion. Light emitted from the aggregate may be polarized in some cases, for example, linearly or circularly, which may be caused by chiral arrangements of polymers within the aggregate (the polymers themselves may or may not be chiral). These aggregates may find widespread use, for example, in enantiomeric detectors, electrochemical devices, photodetectors, organic diodes, sensors, light sources, or photovoltaic devices.
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Citations
103 Claims
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1. An aggregate composition comprising:
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a plurality of polymer molecules, each polymer molecule, prior to aggregation, comprising at least 7 monomer units or having a molecular weight of at least 7000 g/mol, having a fluorescence quantum yield of at least 2%, being electrically conductive or semiconductive, and having electrical properties such that electronic interactions extend at least 2 monomer units from their source such that a spectral comparison of one of the monomer units to the polymer molecule comprising such unit demonstrates a change in gap between the highest filled molecular or electronic orbital and the lowest unfilled molecular or electronic orbital of the monomer unit versus the polymer molecule of at least 0.1 eV, the aggregate comprising the polymer molecules arranged in a non-aligned, electronically-communicative manner providing a fluorescence quantum yield for the aggregate at least 0.05 times that of the individual quantum yields of the polymer molecules, an absorption spectrum having a unique, red-shifted absorption relative to an absorption spectrum of a random dispersion of the polymer molecules, and being stable in the absence of solvent for at least one minute in air at no less than 50 degrees Celsius, as indicated by a change in quantum yield of no greater than 5% and a change in wavelength of the unique absorption of no more than 5%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103)
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Specification
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- Resources
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Current AssigneeMassachusetts Institute of Technology
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Original AssigneeMassachusetts Institute of Technology
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InventorsSwager, Timothy M., Zahn, Steffen
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current528/396
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CPC Class CodesC08G 61/02 Macromolecular compounds co...C09K 11/06 containing organic luminesc...C09K 2211/1416 Condensed systemsC09K 2211/1425 Non-condensed systemsC09K 9/02 Organic tenebrescent materialsH10K 30/00 Organic devices sensitive t...H10K 30/50 Photovoltaic [PV] devicesH10K 50/00 Organic light-emitting devi...H10K 50/10 OLEDs or polymer light-emit...H10K 85/111 comprising aromatic, hetero...H10K 85/151 CopolymersH10K 85/615 Polycyclic condensed aromat...Y02E 10/549 Organic PV cells
