Search Results - "Heeger, A. J"

Strain and Hückel Aromaticity: Driving Forces for a Promising New Generation of Electron Acceptors in Organic Electronics by Brunetti, F.G, Gong, X, Tong, M, Heeger, A.J, Wudl, Fred

“…Straining at the leash: The main features of electron‐accepting materials with a 9,9′‐bifluorenylidene backbone are strain relief and a gain in aromaticity…”
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Efficiency enhancement in low-bandgap polymer solar cells by processing with alkane dithiols by Heeger, A. J, Bazan, G. C, Peet, J, Kim, J. Y, Coates, N. E, Ma, W. L, Moses, D

“…High charge-separation efficiency combined with the reduced fabrication costs associated with solution processing and the potential for implementation on…”
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Metallic transport in polyaniline by Heum Park, Sung, Heeger, A. J, Lee, Kwanghee, Cho, Shinuk, Lee, Suck-Hyun, Lee, Chan-Woo

“…Despite nearly three decades of materials development, the transport properties in the ‘metallic state’ of the so-called conducting polymers are still not…”
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New Architecture for High-Efficiency Polymer Photovoltaic Cells Using Solution-Based Titanium Oxide as an Optical Spacer by Kim, J. Y., Kim, S. H., Lee, H.-H., Lee, K., Ma, W., Gong, X., Heeger, A. J.

“…Polymer photovoltaic cells with power conversion efficiencies approaching 5 % have been fabricated using titanium oxide (TiOx) as an optical spacer (see…”
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Thermally Stable, Efficient Polymer Solar Cells with Nanoscale Control of the Interpenetrating Network Morphology by Ma, W., Yang, C., Gong, X., Lee, K., Heeger, A. J.

“…By applying the specific fabrication conditions summarized in the Experimental section and post‐production annealing at 150 °C, polymer solar cells with…”
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Photoconductivity of a Low-Bandgap Conjugated Polymer by Soci, C., Hwang, I.-W., Moses, D., Zhu, Z., Waller, D., Gaudiana, R., Brabec, C. J., Heeger, A. J.

“…The photoconductive properties of a novel low‐bandgap conjugated polymer,…”
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Water/Methanol-Soluble Conjugated Copolymer as an Electron-Transport Layer in Polymer Light-Emitting Diodes by Ma, W., Iyer, P. K., Gong, X., Liu, B., Moses, D., Bazan, G. C., Heeger, A. J.

“…Multilayer polymer light‐emitting diodes are made using semiconducting polymers. An emissive polymer layer is cast from solution in an organic solvent, and a…”
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Spatial Fourier-Transform Analysis of the Morphology of Bulk Heterojunction Materials Used in "Plastic" Solar Cells by Ma, W., Yang, C., Heeger, A. J.

“…Spatial Fourier transforms and power spectral density were used to analyze digital TEM images of bulk heterojunction material based on poly(3‐hexylthiophene)…”
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Ultrafast Electron Transfer and Decay Dynamics in a Small Band Gap Bulk Heterojunction Material by Hwang, I.-W., Soci, C., Moses, D., Zhu, Z., Waller, D., Gaudiana, R., Brabec, C. J., Heeger, A. J.

“…Photoinduced electron transfer in a small band gap bulk heterojunction material (see figure) is studied by ultrafast spectroscopic methods. In this composite,…”
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Polymer Photovoltaic Cells: Enhanced Efficiencies via a Network of Internal Donor-Acceptor Heterojunctions by Yu, G., Gao, J., Hummelen, J. C., Wudl, F., Heeger, A. J.

“…The carrier collection efficiency ($\eta_c$) and energy conversion efficiency ($\eta_e$) of polymer photovoltaic cells were improved by blending of the…”
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Multilayer Polymer Light-Emitting Diodes: White-Light Emission with High Efficiency by Gong, X., Wang, S., Moses, D., Bazan, G. C., Heeger, A. J.

“…White‐light‐emitting polymer diodes containing hole‐injection/transport and electron‐injection/transport layers have been fabricated by solution processing…”
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Semiconducting (Conjugated) Polymers as Materials for Solid-State Lasers by McGehee, M. D., Heeger, A. J.

“…Light‐emissive polymers are outstanding laser materials because they are intrinsically “4‐level” systems, they have luminescence efficiencies higher than 60 %…”
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Nanostructure of the Interpenetrating Networks in Poly(3-hexylthiophene)/fullerene Bulk Heterojunction Materials: Implications for Charge Transport by Ma, W., Gopinathan, A., Heeger, A. J.

“…The fractal dimension, chemical distance, and finally the effect of an applied electric field on the transport within the interpenetrating network of…”
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Voltage-induced metal-insulator transition in polythiophene field-effect transistors by Dhoot, A S, Wang, G M, Moses, D, Heeger, A J

“…We have extensively studied the carrier transport in regio-regular polythiophene field-effect transistors (FETs) from room temperature to 4.2 K. At low…”
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Visible light emission from semiconducting polymer diodes by BRAUN, D, HEEGER, A. J

“…We report visible light emission from Shottky diodes made from semiconducting polymers, confirming the discovery by the Cambridge group [Nature 347, 539…”
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Photoinduced Electron Transfer from a Conducting Polymer to Buckminsterfullerene by Sariciftci, N. S., Smilowitz, L., Heeger, A. J., Wudl, F.

“…Evidence for photoinduced electron transfer from the excited state of a conducting polymer onto buckminsterfullerene, C$_{60}$, is reported. After…”
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Infrared Imaging of the Nanometer-Thick Accumulation Layer in Organic Field-Effect Transistors by Li, Z. Q, Wang, G. M, Sai, N, Moses, D, Martin, M. C, Di Ventra, M, Heeger, A. J, Basov, D. N

“…We report on infrared (IR) spectromicroscopy of the electronic excitations in nanometer-thick accumulation layers in field-effect transistor (FET) devices…”
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White Electrophosphorescence from Semiconducting Polymer Blends by Gong, X., Ma, W., Ostrowski, J. C., Bazan, G. C., Moses, D., Heeger, A. J.

“…White emission from polymer light‐emitting diodes (PLEDs) is demonstrated using semiconducting polymers blended with organometallic emitters and spin‐cast from…”
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Bulk Heterojunction Materials Composed of Poly(2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene): Ultrafast Electron Transfer and Carrier Recombination by Hwang, In-Wook, Young Kim, Jin, Cho, Shinuk, Yuen, Jonathan, Coates, Nelson, Lee, Kwanghee, Heeney, Martin, McCulloch, Iain, Moses, Daniel, Heeger, A. J

“…The results of time-resolved spectroscopic studies of the structurally ordered liquid-crystalline polymer,…”
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Spiro-Functionalized Polyfluorene Derivatives as Blue Light-Emitting Materials by Yu, W.-L., Pei, J., Huang, W., Heeger, A. J.

“…Novel spiro‐functionalized polyfluorene derivatives (see Figure) are synthesized here. The absorbance and photoluminescence properties of these compounds are…”
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