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Methods of Photoelectrode Characterization with High Spatial and Temporal Resolution

August 17, 2015

Author(s)

Thomas P. Moffat

Materials and photoelectrode architectures that are highly efficient, extremely stable, and made from low cost materials are required for commercially viable photoelectrochemical (PEC) water-splitting technology. A key challenge is the heterogeneous nature

Photovoltaic switching mechanism in lateral structure hybrid Perovskite solar cells

August 5, 2015

Author(s)

Yongbo Yuan, Jungseok Chae, Yuchuan Shao, Qi Wang, Zhengguo Xiao, Andrea Centrone, Jinsong Huang

Organometal trihalide perovskite solar cells with lateral device architecture recently attracted interest because of their switchable photovoltaic effect, which potentially could be leveraged to realize transparent-electrode-free solar cells. However, the

Thermochemical Characterization of Biodiesel Fuels using a Novel Laser-Heating Technique

August 4, 2015

Author(s)

Cary Presser, Ashot Nazarian, Thomas J. Bruno, Jacolin A. Murray, John L. Molloy

A state-of-the-art, rapid laser-heating technique, referred to as the laser-driven thermal reactor, was used to characterize National Institute of Standards and Technology Standard Reference Material (SRM) diesel and biodiesel fuels. Also described are the

Kinetics of the Reactions of H and CH3 with n-Alkanes: Experiments with n-Butane and a Reevaluation Based on a Combustion Model Reaction Network Analysis

July 16, 2015

Author(s)

Jeffrey A. Manion, David A. Sheen, Iftikhar A. Awan

Presented is a combined experimental and modeling study of the kinetics of the reactions of H and CH3 with n-butane, a representative aliphatic fuel. Abstraction of H from n-alkane fuels creates alkyl radicals that rapidly decompose at high temperatures to

Formic Acid oxidation on platinum- a simple mechanistic study

July 15, 2015

Author(s)

Kathleen A. Schwarz, Ravishankar Sundararaman, Thomas P. Moffat, Thomas C. Allison

The oxidation of organic acids on noble metal sur-faces is of importance for industrial processes and of academic interest, but the basic reaction mechanisms continue to be a matter of debate. Historically, mechanisms involving the formic acid molecule

Tuning Open-Circuit Voltage in Organic Solar Cells with Molecular Orientation

June 24, 2015

Author(s)

Brent Kitchen, Omar Awartani, Regis J. Kline, Terry McAfee, Harald Ade, Brendan T. O'Connor

The role of molecular orientation of a polar conjugated polymer in a polymer-fullerene organic photovoltaic (OPV) cells is investigated. A planar heterojunction (PHJ) OPV cell composed of poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid

Methodology and Calculator for High Precision Regression Fits of Pyranometer Angular Responsivities and the Associated Uncertainties

June 23, 2015

Author(s)

Matthew T. Boyd

An easy to implement method for accurately utilizing pyranometer incidence angle dependent calibration factors, or responsivities (uV/W/m2), along with the associated uncertainties has been developed. This method uses algorithms for creating single

A high-concentration programmable solar simulator for testing multi-junction concentrator photovoltaics

June 19, 2015

Author(s)

Tasshi Dennis, Brent Fisher, Matt Meitl, John Wilson

We describe the design and operation of a spectrally programmable solar simulator capable of being concentrated to very high irradiance for the testing of multi-junction concentrator solar cells. The simulator utilizes a spatially coherent, super-continuum

Economic impact of applying high strength steels in hydrogen gas pipelines

June 17, 2015

Author(s)

Jeffrey W. Sowards, James R. Fekete, Robert L. Amaro

Pipeline steel will likely be employed extensively to transport gaseous hydrogen in support of a future clean energy economy. To date, a hydrogen-specific cost analysis of pipeline installation has not been produced. This paper performs several cost

Real-time x-ray scattering studies of film formation in high performing small-molecule organic solar cells

May 23, 2015

Author(s)

Sebastian Engmann, Felicia A. Bokel, Andrew Herzing, Hyun W. Ro, Dean DeLongchamp, Lee J. Richter, Claudio Girotto, Bruno Caputo

We have studied the influence of the additive diiodoctane on the formation dynamics of high performance bulk heterojunction (BHJ) films based the small molecule donor 7,7'-(4,4bis(2- ethylhexyl)-4H-silolo[3,2-b:4,5-b']dithiophene-2,6-diyl)bis(6-fluoro-5-(5

Beyond Fullerene Acceptors: Comparison of Exciton Dissociation at Pc/C60 and Pc/PTCDA Interfaces

May 22, 2015

Author(s)

Steven W. Robey, Gregory J. Dutton

The development of organic photovoltaic technologies would benefit from the introduction of non-fullerene materials to replace the dominant fullerene acceptors. However, efforts to replace fullerenes with non-fullerene polymers or small molecules have

Findings and Recommendations the NIST Workshop on Alternative Fuels and Materials: Biocorrosion

May 4, 2015

Author(s)

Elisabeth Mansfield, Jeffrey W. Sowards, Wendy J. Crookes-Goodson

The Applied Chemicals and Materials Division of the National Institute of Standards and Technology (NIST) hosted a workshop to identify and prioritize testing and data challenges in the area of biocorrosion. Materials used to store and distribute

The Nature of Record Efficiency Fluid-Processed Nanotube-Silicon Heterojunctions

April 20, 2015

Author(s)

Jeffrey A. Fagan, Erik K. Hobbie, John M. Harris, Matthew R. Semler

The dark transport characteristics of heterojunctions assembled from type, chirality and length-purified single-wall carbon nanotubes (SWCNTs) are used to clarify the nature of nanotube-silicon diodes and solar cells. The freestanding films show remarkable