Index Catalog // ScholarsArchive@OSU

Charge carrier dynamics in organic semiconductors and their donor-acceptor composites: Numerical modeling of time-resolved photocurrent

Creator:: Johnson, Brian, Kendrick, Mark J., and Ostroverkhova, Oksana
Abstract:: We present a model that describes nanosecond (ns) time-scale photocurrent dynamics in functionalized anthradithiophene (ADT) films and ADT-based donor-acceptor (D/A) composites. By fitting numerically simulated photocurrents to experimental data, we quantify contributions of multiple pathways of charge carrier photogeneration to the photocurrent, as well as extract parameters that characterize charge...
Resource Type:: Article
Full Text:: -acceptor composites: Numerical modeling of time-resolved photocurrent Brian Johnson, Mark J. Kendrick, and

Design of organic ternary blends and small-molecule bulk heterojunctions: photophysical considerations

Creator:: Rajesh, Kallarakkal Ramakrishnan, Paudel, Keshab, Johnson, Brian, Hallani, Rawad, Anthony, John, and Ostroverkhova, Oksana
Abstract:: We explored relationships between photophysical processes and solar cell characteristics in solution-processable bulk heterojunctions (BHJs), in particular: (1) polymer donor:fullerene acceptor:small-molecule (SM) nonfullerene acceptor, (2) polymer donor:SM donor:SM nonfullerene acceptor, and (3) SM donor:SM nonfullerene or fullerene acceptor. Addition of a nonfullerene SM acceptor to “efficient” polymer:fullerene BHJs led to...
Resource Type:: Article
Full Text:: ,a Keshab Paudel,a Brian Johnson,a Rawad Hallani,b John Anthony,b and Oksana Ostroverkhovaa

Turbulence in Sparse, Organized Vegetative Canopies: A Large-Eddy Simulation Study

Creator:: Bailey, Brian N. and Stoll, Rob
Abstract:: A large-eddy simulation study was performed to characterize turbulence in sparse, row-oriented canopies. This was accomplished by simulating a set of heterogeneous row-oriented canopies with varying row vegetation density and spacing. To determine the effects of heterogeneity, results were compared to horizontally homogeneous canopies with an equivalent ‘effective’ leaf area...
Resource Type:: Article
Full Text:: , organized vegetative canopies: A large-eddy simulation study. Brian N. Bailey · Rob Stoll Received: 7

Enhanced charge photogeneration promoted by crystallinity in small-molecule donor-acceptor bulk heterojunctions

Creator:: Paudel, Keshab, Johnson, Brian, Thieme, Mattson, Haley, Michael M., Payne, Marcia M., Anthony, John E., and Ostroverkhova, Oksana
Abstract:: We examined sub-nanosecond time-scale charge carrier dynamics in crystalline films of a functionalized anthradithiophene (ADT) donor (D) with three different acceptor (A) molecules. A four-fold enhancement in ultrafast charge carrier separation efficiency was observed in D/A blends with a fullerene acceptor added at 7–10 wt. % concentrations, whereas a gradual...
Resource Type:: Article
Full Text:: Brian Johnson,1 Mattson Thieme,1 Michael M. Haley,2 Marcia M. Payne,3 John E. Anthony,3 and Oksana

An Exploratory Multilevel Analysis of Non-Prescription Stimulant Use in a Sample of College Students

Creator:: Bavarian, Niloofar, Flay, Brian R., and Smit, Ellen
Abstract:: Non-prescription stimulant use is a high-risk behavior prevalent in the college population. To date, research on this substance use behavior lacks a comprehensive theoretical lens, as well as geographical diversity. Guided by the Theory of Triadic Influence (TTI), multilevel (i.e. students within schools) modeling was used to analyze survey data...
Resource Type:: Article
Full Text:: Phone: (510) 883-5755 Fax: (510) 644-0594 Email: NBavarian@berkeley.org Brian R. Flay, DPhil

Diversity and distribution of Frankia strains symbiotic with Ceanothus in California

Creator:: Oakley, Brian, North, Malcolm, Franklin, Jerry F., Hedlund, Brian P., and Staley, James T.
Abstract:: Frankia strains symbiotic with Ceanothus present an interesting opportunity to study the patterns and causes of Frankia diversity and distribution within a particular host infectivity group. We intensively sampled Frankia from nodules on Ceanothus plants along an elevational gradient in the southern Sierra Nevada of California, and we also collected...
Resource Type:: Article
Full Text:: Symbiotic with Ceanothus in California Brian Oakley,1* Malcolm North,2 Jerry F. Franklin,1 Brian P. Hedlund

Facilitative and competive effects of a N-fixing shrub on white fir saplings

Creator:: Oakley, Brian B., North, Malcolm P., and Franklin, Jerry F.
Abstract:: In Sierra Nevada forests, shrubs are considered strong soil moisture competitors with regenerating trees, reducing seedling establishment, and slowing growth. Recent studies, however, suggest that in some circumstances shrubs can facilitate tree establishment and growth by modifying harsh microclimate conditions; increasing acquisition of water, carbon, and/or nutrients via shared mycorrhizal...
Resource Type:: Article
Full Text:: effects of a N-fixing shrub on white fir saplings Brian B. Oakley a,*, Malcolm P. North b, Jerry F

Facilitative and competitive effecs of a N-fixing shrub on white fir saplings

Creator:: Oakley, Brian B., North, Malcolm P., and Franklin, Jerry F.
Abstract:: In Sierra Nevada forests, shrubs are considered strong soil moisture competitors with regenerating trees, reducing seedling establishment, and slowing growth. Recent studies, however, suggest that in some circumstances shrubs can facilitate tree establishment and growth by modifying harsh microclimate conditions; increasing acquisition of water, carbon, and/or nutrients via shared mycorrhizal...
Resource Type:: Article
Full Text:: effects of a N-fixing shrub on white fir saplings Brian B. Oakley a,*, Malcolm P. North b, Jerry F

Stocking Rate and Fuels Reduction Effects on Beef Cattle Diet Composition and Quality

Creator:: Clark, Abe, DelCurto, Tim, Vavra, Martin, and Dick, Brian L.
Abstract:: An experiment was conducted to evaluate the influence of forest fuels reduction on diet quality, botanical composition, relative preference, and foraging efficiency of beef cattle grazing at different stocking rates. A split plot factorial design was used, with whole plots (3 ha) being fuel reduced or no treatment (control), and...
Resource Type:: Article
Full Text:: Brian L. Dick4 Authors are 1Research Associate and 2Program Head & Director, Eastern Oregon Agriculture

Home Range and Habitat Selection by Northern Spotted Owls on the Eastern Slope of the Cascade Mountains, Washington

Creator:: Forsman, Eric D., Sovern, Stan G., Taylor, Margaret, and Biswell, Brian L.
Abstract:: We used radiotelemetry to study space use and habitat selection of 16 Northern Spotted Owls (Strix occidentalis caurina) on the eastern slope of the Cascade Mountains, Washington, U.S.A., in 1989–1990. We used a geographical information system (GIS) and aerial photo interpretation of digital orthophotos to assign owl locations a value...
Resource Type:: Article
Full Text:: U.S.A. BRIAN L. BISWELL U.S.D.A. Forest Service, Forestry Sciences Laboratory, 3625 93rd Avenue SW

ScholarsArchive@OSU

Charge carrier dynamics in organic semiconductors and their donor-acceptor composites: Numerical modeling of time-resolved photocurrent

Design of organic ternary blends and small-molecule bulk heterojunctions: photophysical considerations

Turbulence in Sparse, Organized Vegetative Canopies: A Large-Eddy Simulation Study

Enhanced charge photogeneration promoted by crystallinity in small-molecule donor-acceptor bulk heterojunctions

An Exploratory Multilevel Analysis of Non-Prescription Stimulant Use in a Sample of College Students

Diversity and distribution of Frankia strains symbiotic with Ceanothus in California

Facilitative and competive effects of a N-fixing shrub on white fir saplings

Facilitative and competitive effecs of a N-fixing shrub on white fir saplings

Stocking Rate and Fuels Reduction Effects on Beef Cattle Diet Composition and Quality

Home Range and Habitat Selection by Northern Spotted Owls on the Eastern Slope of the Cascade Mountains, Washington

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