John K. Grey
University of New Mexico
81 Papers
748 Citations
John K. Grey is an academic researcher from University of New Mexico. The author has contributed to research in topics: Raman spectroscopy & Excited state. The author has an hindex of 24, co-authored 78 publications. Previous affiliations of John K. Grey include University of Texas at Austin & McGill University.
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Papers
J-Aggregate Behavior in Poly-3-hexylthiophene Nanofibers
Edwards T. Niles,John D. Roehling,Hajime Yamagata,Adam J. Wise,Frank C. Spano,Adam J. Moulé,John K. Grey +6 more
TL;DR: In this article, a delicate interplay exists between intrachain order and inter-chain coupling as revealed through the emission 0−0/0−1 vibronic intensity ratios of poly-3-hexylthiophene (P3HT) assembled in toluene.
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Resonance chemical imaging of polythiophene/fullerene photovoltaic thin films: mapping morphology-dependent aggregated and unaggregated C=C Species.
Yongqian Gao,John K. Grey +1 more
TL;DR: It is proposed that R values report on the relative densities of states (DOS) of aggregated and unaggregated species, and resonance Raman imaging is used to spatially map morphology-dependent variations of R values and uncover subclassifications of these species.
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Charging and discharging of single conjugated-polymer nanoparticles
TL;DR: Good agreement between experimental data and simulations strongly supports the presence ofDeep traps in the studied nanoparticles and highlights the ability of SMS-EC to study energetics and dynamics of deep traps in organic materials at the nanoscale.
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Enhanced Charge Transfer Doping Efficiency in J-Aggregate Poly(3-hexylthiophene) Nanofibers
Jian Gao,Benjamin W. Stein,Alan K. Thomas,Jose A. Garcia,Jing Yang,Martin L. Kirk,John K. Grey +6 more
TL;DR: In this article, the charge transfer doping efficiencies of π-stacked poly(3-hexylthiophene) (P3HT) aggregate nanofibers are studied using spectroscopic and electron microscopy probes.
Resonance Raman Spectroscopic- and Photocurrent Imaging of Polythiophene/Fullerene Solar Cells
TL;DR: In this article, the morphology-dependent polymer aggregation state is spatially mapped to local photocurrent generation efficiency in poly-(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) blend thin film photovoltaic devices.
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