Filters








19 Hits in 11.2 sec

Advanced Sensors for Accurate, Broadband AC Voltage Metrology

Thomas E Lipe, Joseph R Kinard, Donald B Novotny, June E Sims
2013 Journal of Physics, Conference Series  
-Novel multijunction thermal converter in planar technique for AC current, voltage, power and optical radiation measurement M Klonz and T Weimann -Fabrication of Low-Frequency AC-DC Thermal Converter with  ...  We report on advances in ac voltage metrology made possible by a new generation of Multijunction Thermal Converters (MJTCs).  ...  voltage converters [1] - [4] , a technique known as ac-dc transfer.  ... 
doi:10.1088/1742-6596/450/1/012036 fatcat:per36bl3mfdrpf26betqqduiry

News briefs

1993 Journal of Research of the National Institute of Standards and Technology  
As part of a cooperative research and development agreement, a new version of a NIST-developed computer model called LES (Large-Eddy Simulation) will predict smoke concentrations up to 30 km downwind of  ...  NIST, ALASKA EVALUATE IMPACT OF BURNING OIL SPILLS To state of Alaska officials, "burning the midnight oil" may soon take on a whole new meaning.  ...  successfully a "production" run of thin-film multijunction thermal converter chips and tested them to show that they have accuracies approaching those of the best conventional standards, with very low  ... 
doi:10.6028/jres.098.050 fatcat:h45ke7batnd4tmi4gkruye4stq

Superconducting detectors and mixers for millimeter and submillimeter astrophysics

J. Zmuidzinas, P.L. Richards
2004 Proceedings of the IEEE  
This paper describes the scientific opportunities, the basic physics of these devices, the techniques for radiation coupling, and reviews the recent progress in direct detectors, such as transition-edge  ...  As shown in Fig. 1 , the TES is transformer coupled to the SQUID by an input coil. A current-biased shunt resistor is used to provide a constant voltage bias to the TES.  ...  The current through the TES is coupled to a superconducting quantum interference device (SQUID) which acts as a low noise current amplifier.  ... 
doi:10.1109/jproc.2004.833670 fatcat:4lxpstexefformmcjgja2pzo5y

Understanding Smart Sensors

Randy Frank
2000 Measurement science and technology  
MEMS Beyond Sensors Heating Elements Multijunction thermal converters (MJTC) have been fabricated using a standard CMOS process and bulk micromachining [23] .  ...  Some amplifiers work with either ac or dc excitation, and others are designed specifically for ac or dc operation.  ...  the external electrical voltage and/or current applied to a sensor for its proper operation (often referred to as the supply circuit or voltage).  ... 
doi:10.1088/0957-0233/11/12/711 fatcat:inet5t3lzbecrczd2f5tdevkzq

Silicon as a mechanical material

1983 Microelectronics and reliability  
It is clear that silicon will continue to be aggressively exploited in a wide variety of mechanical applications complementary to its traditional role as an electronic material.  ...  This review describes the advantages of employing silicon as a mechanical material, the relevant mechanical characteristics of silicon, and the processing techniques which are specific to micromechanical  ...  When a dc control current is applied to one resistor, the silicon island experiences a temperature rise which is detected by the corresponding diode.  ... 
doi:10.1016/0026-2714(83)90459-6 fatcat:e4d42ituhrbshdwayu3zpw4fza

Silicon as a Mechanical Material

Kurt Petersen
1986 Materials Research Society Symposium Proceedings  
It is clear that silicon will continue to be aggressively exploited in a wide variety of mechanical applications complementary to its traditional role as an electronic material.  ...  This review describes the advantages of employing silicon as a mechanical material, the relevant mechanical characteristics of silicon, and the processing techniques which are specific to micromechanical  ...  When a dc control current is applied to one resistor, the silicon island experiences a temperature rise which is detected by the corresponding diode.  ... 
doi:10.1557/proc-76-99 fatcat:vanluwpanjg2voggjk7ou466bq

Silicon as a mechanical material

K.E. Petersen
1982 Proceedings of the IEEE  
It is clear that silicon will continue to be aggressively exploited in a wide variety of mechanical applications complementary to its traditional role as an electronic material.  ...  This review describes the advantages of employing silicon as a mechanical material, the relevant mechanical characteristics of silicon, and the processing techniques which are specific to micromechanical  ...  When a dc control current is applied to one resistor, the silicon island experiences a temperature rise which is detected by the corresponding diode.  ... 
doi:10.1109/proc.1982.12331 fatcat:sqcuaowthrhv7i73flsslezcfy

2021 Index IEEE Transactions on Instrumentation and Measurement Vol. 70

2021 IEEE Transactions on Instrumentation and Measurement  
Departments and other items may also be covered if they have been judged to have archival value. The Author Index contains the primary entry for each item, listed under the first author's name.  ...  Chen, J., +, TIM 2021 9510511 Converters Comparison of a Thermal AC Voltage Standard in the 1-30-MHz Frequency Range.  ...  R-Smith, N.A., +, TIM 2021 2006109 Multiusing a TVC Toward Development of TVM-Based Phase Measurement System up to 1 MHz.  ... 
doi:10.1109/tim.2022.3156705 fatcat:dmqderzenrcopoyipv3v4vh4ry

The Change We Must Make: Producing Clean Energy (Winter 2008)

2008 The Electrochemical Society Interface  
SnusTovA is a graduate student at Colorado State University working for Steven H. Strauss and Olga V. Boltalina.  ...  Areas of special interest include; (1.) aptamers; (2.) synthetic oligonucleotides; (3.) peptides; (4.) molecularly imprinted polymers; (5.) sol gels; (6.) apoenzymes; (7.) novel sensor concepts; (8.) sensor  ...  In contrast, the current industrial process from quartz to Si wafers relies heavily on thermal processes.  ... 
doi:10.1149/2.20084if fatcat:slk64lg5pnf6pnaqbj5n57ndri

Optical and electrical optimization by advanced characterization of monolithic perovskite/silicon tandem solar cells

Eike Köhnen, Technische Universität Berlin, Steve Albrecht
2021
These optimizations led to an improvement from 25.0% to 26.0% due to reduced reflection and better matching of the photogenerated current densities of the perovskite and silicon subcell. The [...]  ...  current density (JPh) that can be generated in both subcells.  ...  The authors acknowledge funding from HyPerCells (Hybrid Perovskite Solar Cells, http://www.perovskites.de) joint Graduate School, as well as from the German Federal Ministry for Economic Affairs and Energy  ... 
doi:10.14279/depositonce-12324 fatcat:qgjywm6pgfa5nb2i6qiftk3zz4

New organic semiconductors and crosslinking additives for enhanced device performance and stability

Joseph Rumer, Iain McCulloch
2015
The total paradigm is explored with a new class of benzodipyrrolidone-derived semiconductors in OPV and OFET applications.  ...  However, for organic photovoltaic (OPV) cells the current goal is now to stabilise commercially viable efficiencies of >10%, for >10 years.  ...  (DC) films.  ... 
doi:10.25560/25203 fatcat:ovwodjoqqvcmroqlcvwggtxqly

NIR sensitive organic dyes for tandem solar cells and transparent photodiodes

Hui Zhang
2015
It is my great honor to be a member of his group, and I have had a very wonderful experience at EM-PA in the past three and an half years. I am also very grateful to my co-supervisor Dr.  ...  NIR sensitive organic dyes for tandem solar cells and transparent photodiodes i | P a g e Acknowledgements Firstly I would like to express my sincere thanks to my dear supervisor Prof.  ...  frequencies up to 1 MHz.  ... 
doi:10.5075/epfl-thesis-6595 fatcat:xjy336hzprdk3m42snwtitx3jy

Eliminating interface losses in Perovskite single junctions for efficient tandem solar cells

Amran Al-Ashouri, Technische Universität Berlin, Steve Albrecht
2021
By using the SAM on rough CIGSe as hole-selective layer for the perovskite top cell, we have shown a certified 23.3%-efficient, monolithic perovskite/CIGSe tandem solar cell with 1 cm2 active [...]  ...  One of the studied SAMs, a carbazole unit attached to ethylphosphonic acid (2PACz), has shown optimal energetic alignment and minimal non-radiative recombination losses, rendering a "lossless" interface  ...  Alternatively, a solar cell can be seen as a thermodynamic machine that converts heat of the sun into extractable work.  ... 
doi:10.14279/depositonce-12472 fatcat:r3exvkxfhjaftkcswhvbybyfnq

Lead antimony sulfides as potential solar absorbers for thin-film solar cells

Matthieu Versavel
2007
The author has granted a non exclusive license allowing Library and Archives Canada to reproduce, publish, archive, preserve, conserve, communicate to the public by telecommunication or on the Internet  ...  AVIS: L'auteur a accorde une licence non exclusive permettant a la Bibliotheque et Archives Canada de reproduire, publier, archiver, sauvegarder, conserver, transmettre au public par telecommunication  ...  The other PV systems components, such as DC to AC inverters, were not improved as fast as the solar module technology.  ... 
doi:10.7939/r3-qbw9-m403 fatcat:sa7bahqkurfv3eimwikztlvy74

Stability and properties of methylammonium lead iodide solar cells [article]

Felix Christian Lang, Technische Universität Berlin, Technische Universität Berlin, Norbert H. Nickel
2017
The developed water-free transfer process paved the way for a defect free implementation.  ...  The combination forms a tandem solar cell, which has the potential to outperform the individual single junction solar cells.  ...  Hartmann, and A. Abate for helpful discussions. V.V.B. acknowledges financial support from the Alexander-von-Humboldt Foundation.  ... 
doi:10.14279/depositonce-6537 fatcat:ctopcgbsl5dotlvovpuklmcn3m
« Previous Showing results 1 — 15 out of 19 results