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80篇 您的检索式:作者名="Glaab"
    题名 作者 年代 出处 被引量
1Current-induced degradation and lifetime prediction of 310 nm ultraviolet light-emitting diodes显示文摘The impact of operation current on the degradation behavior of 310 nm UV LEDs is investigated over 1000 h of stress. It ranges from 50 to 300 mA and corresponds to current densities from 34 to 201 A/cm^2.To separate the impact of current from that of temperature, the junction temperature is kept constant by adjusting the heat sink temperature. Higher current was found to strongly accelerate the optical power reduction during operation. A mathematical model for lifetime prediction is introduced.It indicates that lifetime is inversely proportional to the cube of the current density, suggesting the involvement of Auger recombinati on.Jan Ruschel Johannes Glaab Batoul Beidoun Neysha Lobo Ploch Jens Rass Tim Kolbe Arne Knauer Markus Weyers Sven Einfeldt Michael Kneissl 2019Photonics Research2019,7,7:3
2Recombination mechanisms and thermal droop in AlGaN-based UV-B LEDs显示文摘This paper reports a comprehensive analysis of the origin of the electroluminescence(EL)peaks and of the thermal droop in UV-B AlGaN-based LEDs.By carrying out spectral measurements at several temperatures and currents,(i)we extract information on the physical origin of the various spectral bands,and(ii) we develop a novel closed-form model based on the Shockley–Read–Hall theory and on the ABC rate equation that is able to reproduce the experimental data on thermal droop caused by non-radiative recombination through deep levels.In the samples under test,the three EL bands are ascribed to the following processes:band-to-band recombination in the quantum wells(main EL peak),a parasitic intra-bandgap radiative transition in the quantum well barriers,and a second defect-related radiative process in the p-AlGaN superlattice.CARLO DE SANTI MATTEO MENEGHINI DESIREE MONTI JOHANNES GLAAB MARTIN GUTTMANN JENS RASS SVEN EINFELDT FRANK MEHNKE JOHANNES ENSLIN TIM WERNICKE MICHAEL KNEISSL GAUDENZIO MENEGHESSO ENRICO ZANONI 2017Photonics Research2017,5,2:2
3Chiral polymer helices with shape identical to previously reported helical calcium carbonate morphologies显示文摘Glaab F Kellermeier M Kunz W 2007Macromol Rapid Commun2007,28,9:1
4Tiotropium versus Salmeterol for the Prevention of Exacerbations of COPD显示文摘Vogelmeier C Hederer B Glaab T 2011N Eng J Med2011,364,12:1
5Tiotropium respimat improves physical functioning in chronic obstructive pul- monary disease显示文摘Rau - Berger H Mitfessel H Glaab T 2010Int J Chron Obstruct Pulmon Dis2010,5,:1
6Impact of salmeterol/fluticasonepropionate versus salmeterol on exacerbations in severe chronicobstructive pulmonary disease 显示文摘Kardos P Wencker M Glaab T 2007Am J Respir Crit Care Med2007,175,2:1
7Tiotropium versus salmeterol for the prevention of exacerbations of COPD 显示文摘Vogelmeier C Hederer B Glaab T 2011N Engl J Med2011,364,12:1
8Increased nitrate reductase activity in leaf tissue after application of the fungicide Kresoxim-methyl显示文摘Glaab J Kaiser W M 1999Planta1999,207,3:1
9Tiotropium versus salmeterol for the prevention of exacerbations of COPD 显示文摘Vogelmeier C Hederer B Glaab T 2011N Engl J Med2011,364,12:1
10Effect of anti-nerve growth factor on early and late airway responses in allergic rats显示文摘GLAAB T HOYMANN H G HECHT M 2003Allergy2003,58,:1
11Impact of Salmeterol/Fluticasone Propionate versus Salmeterol on Exacerbations in Severe Chronic Obstructive Pulmonary Disease显示文摘KARDOS P WENCKER M GLAAB T 2007Am J Respir Crit Care Med2007,,175:1
12Impact of salmeter- ol/fluticasone propionate versus salmeterol on exacerba- tions in severe chronic obstructive pulmonary disease显示文摘Kardos P Wencker M Glaab T 2007Am J Respir Crit Care Med2007,175,2:1
13Impact of salmeterol fluticasone propionate versus salmeterol on exacerbations in severe chronic obstructive pulmonary disease显示文摘Kardos P Wencker M Glaab T 0,,:1
14Invasive and noninvasive methods for studying pulmonary function in mice显示文摘Glaab T Taube C Braun A Mitzner W 0,,:1
15Impact of salmeterol/fluticas- one propionate versus salmeterol on exacerbations in severe chronic obstructive pulmonary disease显示文摘Kardos P Wencker M Glaab T 2007Am J Respir Crit Care Med2007,175,:1
16Totropium versus Salmeterol for the prevention of exacerbations of COPD显示文摘Vogelmeier C Hederer B Glaab T 2011N Engl J Med2011,364,12:1
17A novel assay for allelic discrimination that combines the fluorogenic 5' nuclease polymerase chain reaction (TaqMan) and mismatch amplification mutation assay显示文摘Glaab WE Skopek TR 1999Mutat Res1999,430,1:1
185-Hydroxymethyl fur-fural:assessment of mutagencity,DNA-damaging potential and reacti-vity towards cellular glutathione显示文摘JANZOWSHI C GLAAB V SAMMIMI E 2002Food Chemical Toxicology2002,,38:1
19Analysis of sequence alterations in a defined DNA region: comparison of temperature-modulated heteroduplex analysis and denaturing gradient gelelectrophoresis显示文摘Skopek T R Glaab W E Monroe J J 1999Murat Res1999,430,1:1
20Terahertz imaging detectors in CMOS technology 显示文摘OJEFORS E LISAUSKAS A GLAAB D 2009J Infrared Milli TerahzWaves2009,30,12:1
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